Isad Saric
University of Sarajevo, Faculty of Mechanical Engineering, Faculty Member
- Mechanical Engineering Design, Software, Gears, Catia V5, Finite Element Method (FEM), Interface, and 137 moreComputer-aided Design, Bevel Gears Parameter Modelling, Transmissions Gear Parameter Modelling, Belt Transmissions Parameter Modelling, Spur Gears Parameter Modelling, Worms Parameter Modelling, Mechanical Transmissions Parameter Modelling, Parameter Modelling, External and Internal Evaluation, 2D truss beams, Pre/post Processor, Mechanical Transmissions, Computer Aided Design, Academia.edu, Academic Social Networking, Product Development, Design and Optimization, Faculty Professional Development, Automobile Design, Information & Document Management, Razvoj Proizvoda, Životni Vijek Proizvoda, Faze razvoja proizvoda, Google Scholar, Mendeley, ResearchGate, Development Studies, Concrete Technology, Recycling, AutoCAD, Engineering, Research Methodology, Structural Engineering, Integrated CAD/CAM systems, 3d Modeling, Product Design, Prototyping, Industrial Design, Design Methods, Technology CAD, Integrated Cad/CAE Systems, CAD/CAM, CAD, Design, Auto Cad, CAM, Cad Cam Cae, CAx - Computer-Aided Technologies (CAD,CAM,CNC), Cad/Cam/Fem/Pdm/Plm, Mechanical design, Mechanical design and manufacturing process, Design & Analysis of Mechanical Engineering Components, Material Selection Techniques, Mechanical, Mechanical System Design, 3d Design, Catia, CATIA & PLM, CAD/CAM on Catia, conception of mechanism RRT in catia, CATIA V5 System, Software Eng, Softwares, Software Design, Software Testing, Cylindrical Gears, Product design and Finite Element Analysis, GEARS, Gears Modeling, Gears Conception, Industrial Gears, FEM, Finite Element Methods, Finite Elements methods, Finite element method, Finite element methods (Mathematics), Extended Finite Element Methods, Finite Elements, Finite Element, Finite Element Analysis, Finite Element Modeling, Finite element modelling, Finite Element Analysis (FEA), Finite Elements Analysis, Finite Element Simulations, Finite Element Analysis (Engineering), Computer Aided Geometric Design, Computer aided designing and automation, Computer Aided Design and Manufacturing, Computer Aided Enginneering, Computer Aided Design (CAD), Computer Aided Manufacturing, Gearbox, Gear Design, Gear, Modelling, 4D Modelling, Worms, Mechanical Engineering, Design Engineering, Design (Engineering), Engineering Design, Engineering Product Design, Reverse Engineering of Mechanical Parts, Mechanical Eng, Mechanical System, Mechanical Engg, mECHANICAL eNGINEEERING, Mechanical Testing, Mechanical properties, Mechanical Engineerign, Mechanical Enginering, Mechanical Engginering, Mechanical Enginnering, TOOL DESIGN, Car Design, CNC Design, Free Software, Computer Aided Conceptual Design, CADD, CAE, CAD/CAM/CAE, 3d Modelling, Mechanical Engineer, New Product Development, APPROPRIATE TECHNOLOGY PRODUCT DEVELOPMENT, Product Development Management, Engineering product development process, Production, Product, PLM, Product Lifecycle Management, PLM, PLM solutions, Learning about PLM, PLM, Remanufacturing, Product life cycle management, PLM, Design Innovation, Design thinking, and Interaction Designedit
- Red. prof. dr. sc. / Full Professoredit
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Research Interests: Industrial Design, Industrial Designs, Industrial design education, History of Industrial Design, Industrial Product Design, and 13 moreIndustrial Design Engineering, Commercialisation of Industrial / Product Design Student Projects, Computer Aided Industrial Design, Design of industrial parts, Industrial Design Theory, Product & Industrial Design. Use of new technologies (RP), Design industrial, Industrial Design and Interaction Design, Industrial Process Design, Industrial Design Methods, Industrial Design Research, Industrial Design Methods and Processes, and Engeenering on industrial design
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(1) Background: With the ever-increasing number of polymer materials and limited data on polymer gear calculations, designers are often required to perform extensive experimental testing in order to establish reliable operational data for... more
(1) Background: With the ever-increasing number of polymer materials and limited data on polymer gear calculations, designers are often required to perform extensive experimental testing in order to establish reliable operational data for specific gear applications. This research investigates the potential of a Polyvinyldene fluoride (PVDF) polymer material in gear applications, considering various loading conditions and different types of gear transmission configurations, including both self-mated mesh and steel/PVDF mesh. (2) Methods: PVDF gear samples were tested on a specially designed test rig that enables active torque control and temperature monitoring in order to obtain the necessary design parameters and failure modes. Each test for certain load conditions was repeated five times, and to fully investigate the potential of PVDF gear samples, comparative testing was performed for Polyoxymethylene (POM) gear. (3) Results: Tribological compatibility, tooth load capacity, and lifespan assessment, along with the types of failure, which, for some configurations, include several types of failures, such as wear and melting, were determined. Temperature monitoring data were used to estimate the coefficient of friction at the tooth contact of analyzed gear pairs, while optical methods were used to determine a wear coefficient. (4) Conclusions: The tribological compatibility of polymer gear pairs needs to be established in order to design a gear pair for a specific application. PVDF gear samples mated with steel gear showed similar lifespan properties compared to POM samples. Temperature monitoring and optical methods serve as a basis for the determination of the design parameters. PVDF is an appropriate material to use in gear applications, considering its comparable properties with POM. The particular significance of this research is reflected in the establishment of the design parameters of PVDF gear, as well as in the analysis of the potential of the PVDF material in gear applications, which gives exceptional significance to the current knowledge on polymer gears, considering that the PVDF material has not previously been analyzed in gear applications.
Research Interests: Gears, Lifespan, Tribology and tribological design of mechanical systems, Failure modes and effects analysis, Tribological Properties, and 11 moreCoefficient of Friction, Tribological Behaviour, Wear Coefficient, Tribological Performance, Mechanical and Tribological Properties, Tribological Characteristics, Coefficients of Friction, Failure Modes, Failure Modes Effects Tests, polyvinylidene fluoride (PVDF) polymer, and pvdf polymer
Modern technologies are essential parts of Industry 4.0. From automation, robotics, digitalization and additive manufacturing (3D printing) up to 3D scanning and reverse engineering. 3D scanning has a wide range of usage in today product... more
Modern technologies are essential parts of Industry 4.0. From automation, robotics, digitalization and additive manufacturing (3D printing) up to 3D scanning and reverse engineering. 3D scanning has a wide range of usage in today product development and design processes. This paper will present several real case studies of 3D scanning in reverse engineering and new product development and design processes. Paper explores importance of 3D scanning technology, as integral part of Industry 4.0. Seven case studies are explored in more detail. Five of these case studies are realized in Laboratory for Product development and design at University of Sarajevo – Faculty of mechanical engineering as a parts of the projects realized in cooperation with several companies from Bosnia and Herzegovina, while two of them are realized in Protodevs company in Sarajevo. Artec Eva 3D scanner and Artec Studio software was used for most of the presented case studies.
Research Interests: Reverse Engineering of Mechanical Parts, New Product Development, Reverse Engineering, Engineering product development process, Product Development, and 11 more3D Laser scanning, Reverse Engineering Software, 3D scanning, New Product/Process Development, Software reverse engineering, Reverse Engineering, Rapid Prototyping, CAD inspection, Types of Reverse Engineering, Papers on Reverse Engineering, Industry 4.0, 3D Laser Scanning Technology, and Industry 4.0 Technologies
Air pollution is one of the main environmental problems today. It is a problem which cannot be solved in many cities around the world. Sarajevo, as main capital of Bosnia and Herzegovina, is one of those cities. Few times during every... more
Air pollution is one of the main environmental problems today. It is a problem which cannot be solved in many cities around the world. Sarajevo, as main capital of Bosnia and Herzegovina, is one of those cities. Few times during every year, Sarajevo is the most polluted city in the world, especially during winter season. Taking in consideration that air pollution cannot be solved on global level for one town or country, engineers are started to work on the devices that can improve air quality in small closed spaces like offices, schools or homes. This paper is focused on the design and development of an air purification device intended for indoor use, full development process is presented, from initial design to prototype manufacturing using additive manufacturing (3D printing).
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Building information modeling (BIM) is a process based on so called intelligent three dimensional (3D) models. These models incorporate not only dimensional properties of the product. They incorporate all information’s about functional or... more
Building information modeling (BIM) is a process based on so called intelligent three dimensional (3D) models. These models incorporate not only dimensional properties of the product. They incorporate all information’s about functional or descriptive properties. There is significant difference between computer aided design (CAD) modeling and BIM modeling. Goal of this paper is to describe and highlight that differences. Through the paper it is described when, where and why BIM modeling needs to be used. Idea behind BIM modeling principles is described in detail. In addition, advantages and disadvantages of BIM modeling is highlighted. Potential possibilities of using BIM modeling in the field of mechanical engineering have been presented.
Research Interests: Mechanical Engineering, Computer Aided Design, Building Information Modeling, Computer aided designing and automation, Computer Aided Design Applications, and 9 moreMechanical Engineering Design, Computer-aided Design, Building Information Modeling Implementation, Computer Aided Design (CAD), CAD tools, Mechanical Design engineering, Building Information Modeling (BIM), BIM - Building Information Modeling, and Building Information Modeling(BIM)
This paper presents the development and implementation of integrated intelligent CAD (computer aided design) system for design, analysis and prototyping of the compression and torsion springs. The article shows a structure of the... more
This paper presents the development and implementation of integrated intelligent CAD (computer aided design) system for design, analysis and prototyping of the compression and torsion springs. The article shows a structure of the developed system named Springs IICAD (integrated intelligent computer aided design). The system bounds synthesis and analysis design phases by means of the utilization of parametric 3D (three-dimensional) modeling, FEM (finite element method) analysis and prototyping. The development of the module for spring calculation and system integration was performed in the C# (C Sharp) programming language. Three-dimensional geometric modeling and structural analysis were performed in the CATIA (computer aided three-dimensional interactive application) software, while prototyping is performed with the Ultimaker 3.0 3D printer with support of Cura software. The developed Springs IICAD system interlinks computation module with the basic parametric models in such a way that spring calculation, shaping, FEM analysis and prototype preparation are performed instantly.
Research Interests: C#, Rapid Prototyping, Prototyping, Virtual Prototyping, Fast Prototyping, and 11 moreSprings, Fdm Process in Rapid Prototyping, FEM analysis, Programacion en C Sharp, Numerical Modeling and FEM Analysis In Structural Mechanics, Modelling and Prototyping, Computer Aided Design / Manufacturing / Engineering (CAD-CAM-CAE) Product Data Management / Product Lifecycle Management (PDM/PLM) Lean Production (Kaizen, 5S, Six sigma) Rapid Prototyping / Manufacturing (3D printing), numerical analysis by the finite element method – FEM, Integrated Intelligent Cad (IICAD) System, integrated intelligent CAD system, and parametric 3D modelling
In this paper we displayed the problematic of spring design, with usage of CAD/CAE (Computer Aided Design/Computer Aided Engineering) methods. Spring 3D (Three-dimensional) parametric modeling is performed in CATIA (Computer Aided... more
In this paper we displayed the problematic of spring design, with usage of CAD/CAE (Computer Aided Design/Computer Aided Engineering) methods. Spring 3D (Three-dimensional) parametric modeling is performed in CATIA (Computer Aided Three-dimensional Interactive Application) software for purposes of achieving fast manipulation of spring geometry, so various spring variants can be made. Using the same software, FEM (Finite Element Method) analysis is used to determine maximum stresses and deflections. Utility of developed parametrized spring system is best reflected for cases of new spring design, where new geometric and FEM models are created with simple parameter application and update feature. This research resulted in spring prototyping with utilization of 3D printing techniques and spring manufacturing.
Research Interests: Design, Integrated Cad/CAE Systems, 3d Modeling, Cad Cam Cae, SPRING, and 14 more3d -Modeling, Prototypes, CAD/CAM/CAE, Springs, Parametric 3D Modeling, CAD/CAM/CAE Systems, CAD/CAM/CAE System, FEM analysis, Numerical Modeling and FEM Analysis In Structural Mechanics, Prototype, numerical analysis by the finite element method – FEM, CAD-CAE systems, CAD/CAE, and Parametrized system
Goal of this research was to develop and manufacture planetary gearbox prototype using rapid prototyping technology (additive manufacturing). Developed prototype was used to visually analyse the design of the planetary gearbox. Also, it... more
Goal of this research was to develop and manufacture planetary gearbox prototype using rapid prototyping technology (additive manufacturing). Developed prototype was used to visually analyse the design of the planetary gearbox. Also, it was used to improve and innovate education of students on several courses at Mechanical Design study program at Faculty of Mechanical Engineering. It is shown that low cost rapid prototyping technology can be used to manufacture prototypes of complex machines and machine elements. Prototypes manufactured using this technology have same functionality like the real one. Main limitation is the fact that they cannot sustain real world loads and stresses. This paper shows opportunities which low cost rapid prototyping technology is offering in improvement and innovation of education process at engineering schools and faculties. All complex and heavy machines can be manufactured using this type of technology and on that way more precisely presented to the students.
Research Interests: Education, Teacher Education, Higher Education, Rapid Prototyping, Mechanical System Design, and 11 moreMechanical Engineering Design, Drawing and mechanical design, Mechanical design, Planetary Gearbox, Mechanical design and manufacturing process, Development of Design and Analysis of Mechanical Systems, Designing of Mechanical Systems, Mechanical Design and Engineering of Materials, Mechanical and Design Engineering, Mechanical Design engineering, and design of mechanical elements
This paper presents the methodology for development and design of a machine for rapid prototyping with integrated hybrid manufacturing technology. Hybrid manufacturing technology is technology which can manufacture parts by adding and... more
This paper presents the methodology for development and design of a machine for rapid prototyping with integrated hybrid manufacturing technology. Hybrid manufacturing technology is technology which can manufacture parts by adding and removing materials during the same manufacturing process. Methodology includes all phases of product development and design. From initial concept development, selecting optimal solution, development of 3D CAD models, up to technical documentation and manufacturing of a machine. At the end of a paper comparison between developed machine and other similar machines are carried out. Advantages and disadvantages of developed machine are highlighted. Also, most important properties of developed machine for manufacturing of prototypes and final parts are presented.
Research Interests: Rapid Prototyping, Design and Product Development, Rapid-prototyping, Fdm Process in Rapid Prototyping, Product Design and Development, and 12 moreReverse Engineering, Rapid Prototyping, CAD inspection, Computer Aided Design (CAD), Product Design and Development Mechanical Engineering, Computer Aided Design / Manufacturing / Engineering (CAD-CAM-CAE) Product Data Management / Product Lifecycle Management (PDM/PLM) Lean Production (Kaizen, 5S, Six sigma) Rapid Prototyping / Manufacturing (3D printing), Hybrid manufacturing, Computer Aided Design (CAD), Computer Aided Engineering (CAE, Innovation, product development, design, and manufactruing, Experience Design and Product Development, : design thinking, computer aided design (CAD),design education, Hybrid additive manufacturing, Joint Product Design and Development, and Product development and design
Throughout the history, technical solutions were formed due to necessity of solving specific problem with usage of tools, mechanisms and similar devices. All of the solutions need to satisfy certain requirements so that final product is... more
Throughout the history, technical solutions were formed due to necessity of solving specific problem with usage of tools, mechanisms and similar devices. All of the solutions need to satisfy certain requirements so that final product is technologically and economically acceptable and relative to user requirements, at the same time. For that reason, with development of diode technology, LED (Light Emitting Diode) lightning solution imposed as an eligible method for surface lightening. In recent period, it is noticed that LED diodes can triple their light-emitting power. This property is one of the primary reasons that have led to modern light sources which use LED solutions. Main goal of this research is to create high-efficeint LEDlamp that pleases lightning needsof public areas and has better economical features than existing HID (Hight-Intensity Dischare) solutions. Research features basic principles of new product design, along with necessary structural analysis and simulations that give insight of complete design performances and characteristics. Design process considers productivity of assembly elements with available technologies.
Research Interests: Technology, Engineering Product Design, Product Design, Modeling and Simulation, Numerical Analysis, and 14 moreStructural Analysis, Simulation, LED Lighting, Analysis, Industrial Product Design, Computer Simulation, LED, LED lighting design, Design and Production Technology, Finite Element Simulations, System Modeling and Simulation, Innovation and New Product Design, FEM Modelling and Numerical Simulation, and HID
Within the work, on the basis of previously obtained real components, the design, dimensioning and analysis of hexacopters were performed. The 3D virtual model was developed using the SolidWorks software package, and then the necessary... more
Within the work, on the basis of previously obtained real components, the design, dimensioning and analysis of hexacopters were performed. The 3D virtual model was developed using the SolidWorks software package, and then the necessary stress analysis by the finite element method was performed. After 3D modeling, an analytical load calculation was performed on the hexacopter landing and take-off mechanism. During the calculation, real loads were used during the landing and take-off of the hexacopter. After the analytical calculation, a numerical analysis was performed using the finite element method, where the mechanisms for landing and taking off hexacopters were observed separately. In FEM analysis, the principal stresses at characteristic places were observed, as well as displacements or deformations on the take - off mechanism. After that, a comparison of analytical calculation and numerical (FEM) analysis of the hexacopter structure was performed. On that occasion, a good match between the results of these two methodswas established, which verified the numerical method used.
Research Interests: Design, Composite Materials and Structures, Composite Materials, Stress analysis, Mechanical engineering- material science- composite materials, and 9 moreAdvanced Composite Materials Applications in Electronics Devices, Drones, Composite Materials Used in Aerospace Engineering, Drone, Stress Analysis, Design and Stress Analysis of Structures Using Finite Element Analysis Approach, Stresses Analysis, Hexacopter, and Hexacopter Modelling and Simulation
With the development of science and rapid growth of engineering needs for suitable structural analysis softwares, FEM (Finite Element Method) analysis has become one of themain tools for design process. Combination of hardware and... more
With the development of science and rapid growth of engineering needs for suitable structural analysis softwares, FEM (Finite Element Method) analysis has become one of themain tools for design process. Combination of hardware and software resources gives complete geometric model of any assemblywith accurate results for research field. At the same time, this approach enables effective realtime data manipulation that reduces design process time to minimum. Practical significance of this design system is reflected in more convenient, faster and safer task completion. Bridge cranes are one of the most widely used cranes for material transport in modern production and they represent complex systems, composed of many subsystems with different coupling characteristics. Empirical design is most often used for crane’s necessary structure calculations and other design parameters that have direct impact on production performance.Bridge girder, as a main component in special machinery equipment, requires accurate perfomance data results like bending stresses and deflections that meet the design requirements. The result of this research is analytical calculation of single girder bridge crane, with determined maximum bending stress and deflection on bridge girder. After calculation is performed, geometric 3D model of single girder bridge crane is created in CATIA (Computer Aided Three-dimensional Interactive Application) software. Geometric 3D model was than subjected to FEM analysis in same software, whereupon results comparison has been done.
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A novel method for indoor air quality monitoring is presented in this paper. It is based on the network of smart sensors permanently connected to the cloud. The prototype system, consisting of 10 smart sensors is evaluated in laboratory... more
A novel method for indoor air quality monitoring is presented in this paper. It is based on the network of smart sensors permanently connected to the cloud. The prototype system, consisting of 10 smart sensors is evaluated in laboratory and real use. Each smart sensor was able to measure air temperature, relative humidity, particulate matter concentration, and carbon dioxide concentration. The cloud-based architecture of the system is explained, followed by the calibration method and real scenario results. The system proved to be suitable for real-time monitoring of indoor air quality parameters for large buildings.
Research Interests: Indoor Air Quality, Carbon Dioxide, Wireless Sensor Networks, WSN (Wireless sensor network), Sensor networks, and 13 moreParticulate Matter Emissions, Sensor Network, Air pollution, particulate matter, health effects, Wireless Sensor Networks (WSNs), Thermal Comfort, Indoor Air Quality, Thermal Comfort,Indoor Air Quality, Particulate Matter, Wireless Sensor Network, Indoor air quality, Safety, environmental, Improve Indoor Air Quality, Thermal comfort and indoor air quality (IAQ), Low cost sensors, and Low-cost sensors
Main goal of this paper is to present the methodology for product development and design. A bicycle stand product is chosen as a case study. Presented methodology is a process with several steps which include definition of problem,... more
Main goal of this paper is to present the methodology for product development and design. A bicycle stand product is chosen as a case study. Presented methodology is a process with several steps which include definition of problem, generating several concept designs, analysis of generated designs, choosing the best concept design, development of virtual prototype and development of real prototype. Presented methodology can be used for development and design of any product. Process of development of virtual and real prototype is presented in more detail. Virtual prototype is developed using advanced computer aided design technologies. Real prototype is developed and manufactured using advanced additive manufacturing technology.
Research Interests: Research Methodology, Methodology, Case Study Research, Engineering Product Design, Product Design, and 12 moreNew Product Development, Industrial Product Design, Case Study, Engineering product development process, Product Development, Design and Production Technology, Design Methodology, Case Study Method, Product & Industrial Design. Use of new technologies (RP), Innovation and New Product Design, Virtual prototype, and Real prototype
The progress of additive manufacturing technology brings about many new questions and challenges. Additive manufacturing technology allows for designing machine elements with smaller mass, but at the same time with the same stiffness and... more
The progress of additive manufacturing technology brings about many new questions and challenges. Additive manufacturing technology allows for designing machine elements with smaller mass, but at the same time with the same stiffness and stress loading capacity. By using additive manufacturing it is possible to produce gears in the form of shell shape with infill inside. This study is carried out as an attempt to answer the question which type of infill, and with how much density, is optimal for a spur gear tooth to ensure the best stiffness and stress loading capacity. An analysis is performed using numerical finite element method. Two new infill structures are proposed: triangular infill with five different densities and topology infill designed according to the already known results for 2D cantilever topology optimization, known as Michell structures. The von Mises stress, displacements and bending stiffness are analyzed for full body gear tooth and for shell body gear tooth with above mentioned types of infill structure.
Research Interests: Product design and Finite Element Analysis, GEARS, Gears, Spurs, spur gear design with CAD model, CAD-modeling, spur gears, altitude modification, and 13 morecontact stresses; CAD, CAE simulation, spur gear modelling, Spur Gears Parameter Modelling, Tooth, Spur Gear, Infill, Helical Gear and Spur Gear, Spur gear loading, Static Analysis, Fatigue Analysis, Gear Parameters, Spur Gear, And CFD Analysis, Spurs Gear, Spur Gear Pair, Spur gear tooth, Spur and Helical Gears, and Composite spur gear
In this paper we displayed the problematic of modeling, analysis and simulating work process of specific tool used for punching and cutting operations on inner plate of the front car door. Basic principles of treating material with... more
In this paper we displayed the problematic of modeling, analysis and simulating work process of specific tool used for punching and cutting operations on inner plate of the front car door. Basic principles of treating material with deformations are displayed, to easily understand operations that are performed during the work of the tool. Principles of geometric modeling, application of Boolean operations, parametrized individual standard parts and databases are very important factors for tool modeling. Beside modeling it is very important to calculate the specific parts based on standards which are used in car industry. After geometrical modeling of tool, simulation and work analysis have been performed to control the movement speed of the tool during production. Simulation also enables faster design process for the tool, increases work safety etc.
Research Interests: Modeling, Modeling and Simulation, Structural Analysis, Simulation, Analysis, and 13 moreComputer Simulation, Parametric Modeling, Tools, Applied mathematics and Modelling, CATIA & PLM, Catia V5, Catia, Finite Element Simulations, FEM Modelling and Numerical Simulation, CATIA V5 System, Catia V5 R19, ANSYS, CATIA, FEA, Heat Flow, Static, Thermal Behavior, Temperature Distribution, And Transient Temperature, and Catia V5R20
This paper presents the methodology for integrated product development and design. Gears reduction drive was chosen as example. For design process, advance 3D methods and technologies were used, technologies such as: 3D geometric... more
This paper presents the methodology for integrated product development and design. Gears reduction drive was chosen as example. For design process, advance 3D methods and technologies were used, technologies such as: 3D geometric parametric modeling of virtual prototype, simulation of working principles, manufacturing of real prototype using additive manufacturing (3D printing) and usage of augmented reality. In conclusion part of the paper, using results from this research, advantages of integrated product development and design are highlighted, with special focus on influence of this methodology on students education at Faculty of Mechanical Engineering in the field ofmechanical power transmissions.
Research Interests: Augmented Reality, 3D printing, Gears, Additive Manufacturing, Additive Manufacturing and Technical Functional Analysis, and 15 moreAdditive Manufacturing and 3D printing, Additive manufacturing, digital fabrication, Augmented Reality Technology, Spur Gears Parameter Modelling, Cylindrical Gears, Gears Modeling, 3D Printing Process, Three dimensional Printing (3DP), Additive Manufacturing Process Planing and Simulation, Gears and Transmission systems, 3D Additive Manufacturing, Design and 3D printing, Design for Additive Manufacturing, Gears reduction drive, and Additive manufacturing (3D printing)
U radu su prikazani rezultati istraživanja mogućnosti geometrijskog parametarskog modeliranja realnih mašinskih dijelova koristeći trenutno najsavremeniji CAD/CAM/CAE softverski sistem CATIA V5. Popis slika, tabela i korištenih oznaka dat... more
U radu su prikazani rezultati istraživanja mogućnosti geometrijskog parametarskog modeliranja realnih mašinskih dijelova koristeći trenutno najsavremeniji CAD/CAM/CAE softverski sistem CATIA V5. Popis slika, tabela i korištenih oznaka dat je na početku a indeks pojmova na kraju rada. Rad se sastoji od sedam poglavlja i dodatka. U prvom poglavlju opisano je područje istraživanja sa jasno definisanim ciljem, metodom i sadržajem istraživanja, te opisom korištene laboratorijske opreme (radnih stanica i CATIA V5 sistema). Prednosti konstruisanja podržanog računarom u odnosu na konvencionalni pristup, opis pojedinih faza procesa konstruisanja i pregled novih metoda projektovanja i konstruisanja sadržaj su drugog poglavlja. Osnovne postavke računarske grafike i transformacije na kojima se temelji modeliranje mašinskih dijelova pomoću računara izložene su u trećem poglavlju. Središnje četvrto poglavlje sadrži opis metoda geometrijskog i parametarskog modeliranja mašinskih dijelova. Praktična primjena izloženih metoda prikazana je u petom poglavlju na primjerima geometrijskog parametarskog modeliranja različitih vrsta zupčanika CATIA V5 sistemom. Zaključna razmatranja šestog poglavlja, koja su obuhvatila i faze implementacije CAD/CAM/CAE sistema i posljedice njegovog uvođenja, pokazuju da se funkcionalnost parametarske asocijativnosti obavezno mora primjenjivati u interakciji sa dosadašnjim tradicionalnim geometrijskim pristupom modeliranja. U posljednjem sedmom poglavlju dati su literaturni navodi.
Research Interests: Cad Cam Cae, Catia V5, CAD/CAM/CAE, Sistem, CAD/CAM/CAE Systems, and 6 moreCAD/CAM/CAE System, CATIA V5 System, Computer Aided Design / Manufacturing / Engineering (CAD-CAM-CAE) Product Data Management / Product Lifecycle Management (PDM/PLM) Lean Production (Kaizen, 5S, Six sigma) Rapid Prototyping / Manufacturing (3D printing), Catia V5 R19, CAx software tools ( CAD/CAM/CAE/CAID/CARD/CARE/CASE/ PLM/ERP/DNC/CAQ), and geometrijsko i parametarsko modeliranje
U disertaciji je prikazana arhitektura integrisanog CAD sistema za konstruisanje mehaničkih prenosnika snage (ICADkmps). Sistem je razvijen u C# programskom okruženju sa ciljem automatizacije procesa konstruisanja mehaničkih prenosnika... more
U disertaciji je prikazana arhitektura integrisanog CAD sistema za konstruisanje mehaničkih prenosnika snage (ICADkmps). Sistem je razvijen u C# programskom okruženju sa ciljem automatizacije procesa konstruisanja mehaničkih prenosnika snage. Disertacija prikazuje savremeni automatizovani pristup konstruisanja. Opisani su razvijeni kmps moduli za proračun geometrijsko-konstruktivnih karakteristika mehaničkih prenosnika snage. 3D geometrijsko parametarsko modeliranje (oblikovanje) mehaničkih prenosnika snage vrši se u CAD/CAM/CAE sistemu CATIA V5. Veza između kmps modula za proračun i CATIA V5 sistema za oblikovanje ostvarena je preko baznih (inicijalnih) 3D modela – templates. Izlaz iz razvijenog ICADkmps sistema su generisani finalni 3D virtuelni prototipovi mehaničkih prenosnika snage. Testiranje razvijenog ICADkmps sistema vršeno je na zupčastim (cilindričnim i koničnim), remenim i kaišnim, frikcionim i lančanim prenosnicima. Sa ciljem dodatnog testiranja i verifikacije praktične primjene, vršeno je povezivanje razvijenog ICADkmps sistema s uređajem za brzu izradu prototipova i CNC mašinama. Izrađeni su fizički prototipovi konstruisanih karakterističnih elemenata mehaničkih prenosnika snage. Odabrani testni 3D virtuelni prototipovi, dobijeni kao izlaz iz razvijenog ICADkmps sistema, izrađeni su na uređaju za brzu izradu prototipova (3D kolor printer Spectrum Z510) i CNC mašinama. Na kraju disertacije su, na osnovu teorijskih i praktičnih rezultata istraživanja, izložena zaključna razmatranja i predloženi mogući pravci daljnjih istraživanja.
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During process of product development and design, it is important to keep production cost as small as possible. One way to reduce the production cost is by degrading the quality of the product, which is “worst-case” scenario and it should... more
During process of product development and design, it is important to keep production cost as small as possible. One way to reduce the production cost is by degrading the quality of the product, which is “worst-case” scenario and it should not be used. Another way is to turn to the application of new knowledge and insights, which enables better utilization of resources and processes. New knowledge may include new materials and/or new technologies, but may also include new ways and methods of product development and design. The increasing complexity of products, the use of new materials, methodologies and technologies, require increasing computer support for the design process. Because of this, there is a need for a better scientific approach and a better understanding of the design process using a number of software design tools, interaction between these tools and better collaboration between designers. This paper describes the process of developing the knowledge based intelligent integrated computer aided design (IICAD) system for the calculation, dimensioning and development of a bridge crane model with two main supports. This methodology of IICAD software development can be used to develop numerous other IICAD computer systems for various fields of engineering. Main contribution of this paper is above mentioned and presented methodology. Also, goal of this paper is to prove that standard computer aided design (CAD) systems, needs to be expanded with this knowledge based intelligent integrated systems to achieve higher levels of performance.
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Proportional–integral–derivative (PID) control is the most common control approach used to control active magnetic bearings system, especially in the case of supporting rigid rotors. In the case of flexible rotor support, the most common... more
Proportional–integral–derivative (PID) control is the most common control approach used to control active magnetic bearings system, especially in the case of supporting rigid rotors. In the case of flexible rotor support, the most common control is again PID control in combination with notch filters. Other control approaches, known as modern control theory, are still in development process and cannot be commonly found in real life industrial application. Right now, they are mostly used in research applications. In comparison to PID control, PI-D control implies that derivate element is in feedback loop instead in main branch of the system. In this paper, performances of flexible rotor/active magnetic bearing system were investigated in the case of PID and PI-D control, both in combination with notch filters. The performances of the system were analysed using an analysis in time domain by observing system response to step input and in frequency domain by observing a frequency response of sensitivity function.
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This paper demonstrates the process of designing tools for injection molding of ASA polymers, conducted based on 3D model of requested work piece that was used in auto-industry, by using CAD/CAE/CAM software packages (CATIA, VISI Vero,... more
This paper demonstrates the process of designing tools for injection molding of ASA polymers, conducted based on 3D model of requested work piece that was used in auto-industry, by using CAD/CAE/CAM software packages (CATIA, VISI Vero, Autodesk Mold flow and ANSYS). The focus of research was aimed at stages of synthesis and analysis during the process of tool design. During 3D geometric, modeling of tools was used available bases/catalogues of standard parts and subassemblies. Numerical analysis was performed of ASA polymer flow and numerical structural analysis of main plate of tools, and the results obtained by CFD and FEM methods of numerical analysis have been verified in relation to previously obtained results by analytical analysis. Final considerations confirm that methodology presented in this paper can be used during the design of similar tools for injection molding of ASA polymers in autoindustry, with noted benefits.
Research Interests: Numerical Analysis, Structural Analysis, Design Tools, Computational Fluid Dynamics (CFD) modelling and simulation, CFD Analysis, and 15 moreInjection Molding Process, FEA, Heat Transfer, CFD, Injection Molding, Parametric and Generative Design tools, Plastic Injection Molding, CFD FEM, CFD simulation, Computational Fluids Dynamics (CFD), Simulation of Injection Molding and Extrusion Processes, Press Tools Design, Injection Molding Mold Design, Injection Molding Simulation, Design of Injection Molding Mold, Optimisation of injection molding parameters, and ASA polymer
There is a lot of papers concerning gears topology optimization, but all of them are limited to the topology optimization of gear body. Gear tooth is not taken into consideration so far. Gear tooth was not optimized before because... more
There is a lot of papers concerning gears topology optimization, but all of them are limited to the topology optimization of gear body. Gear tooth is not taken into consideration so far. Gear tooth was not optimized before because optimised structure could not be produced. By advancing of additive manufacturing technology, now, gear tooth can be produced in a form of shell body with empty space inside. In this paper, mass of spur gear tooth is optimized in relation to Von-Misses stress on critical places on the gear tooth. Optimization goal is to find optimal shell thickness of shell body spur gear tooth.
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Difference between industrial designer and product designer is not precisely defined. There is a lot of discussions and misunderstandings about these two professions. What is the job of industrial designer and what is the job of product... more
Difference between industrial designer and product designer is not precisely defined. There is a lot of discussions and misunderstandings about these two professions. What is the job of industrial designer and what is the job of product designer? This question if often asked from people, which want to hire someone to design a new product for them. Through this research, same real-life design contest is given to group of students from Faculty of Mechanical Engineering, Department of Mechanical Design, at Industrial design course and to group of students from Academy of Fine Arts, Department of Product Design as product design project. Goal of the contest was to design an upholstered chair for indoor use with a modern and refined style. Goal of this research was to find some unique characteristic of designs from industrial designers and product designers. Resulted designs were evaluated analysing the fulfilment of the requirements criteria defined by contest and analysing additional criteria, which is important for new product design. Analysing the resulted designs some important conclusions are made. Most important conclusion is that industrial designer can be product designer but product designer cannot be industrial designer. For product design, engineering knowledge is not necessary, but for industrial design, it is most important.
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Intensive utilization of computers is especially emphasized in the field of industrial production, where use of computer applications achieves significant savings in regard to the time required for manufacturing of products. Shortening of... more
Intensive utilization of computers is especially emphasized in the field of industrial production, where use of computer applications achieves significant savings in regard to the time required for manufacturing of products. Shortening of the production time decreases the production costs and new products are faster introduced to the market, thus making the company more competitive. In addition to the shorter time for production, better precision and accuracy is also accomplished, resulting with better product quality at the end. Due to the fact that, for the reason of cost-effectiveness of manufacturing of tools, processing of sheet metal on presses is primarily performed in the course of serial production, this paper focuses on an analysis of the use of computers in the process of design of tools for punching and cutting of sheet metal on presses. The presented methodology encompasses all phases in the process of design of tools – from planning the work piece until the final design of the tool for punching and cutting, with an emphasis on the activities performed exclusively by computer applications. The result of this research is a 3D geometrical model of a tool for punching and cutting, with an explanation of characteristics of its construction parts, calculation of its executive parts, analysis and simulation of operation of the tool, and finally the conclusion on the representation and importance of the utilization of computer applications in the process of design of such tools.
Research Interests: Modeling, Sheet Metal Forming, Modeling and Simulation, TOOL DESIGN, MACHINE TOOL DESIGN, and 13 moreDesign Tools, Design Tool, CATIA & PLM, Catia V5, Sheet Metal, Analysis of Sheet Metal Forming Processes, Catia, Sheet metal forming process simulation and die design., Design of Tools and Manufacturing Process of Sheet Metal Forming, Drawing as a tool for design, CATIA V5 System, Press Tools Design, and Presses
In this paper we will observe the model of competitive types and it will be analyzed using the nullcline method. It will be shown that this model has four points of equilibria, which are stable or unstable depending on the parameters a... more
In this paper we will observe the model of competitive types and it will be analyzed using the nullcline method. It will be shown that this model has four points of equilibria, which are stable or unstable depending on the parameters a and b. The local stability of these points was investigated and global dynamics was determined using nullcline methods, that is, the bases of attraction of these points were shown.
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Integrated intelligent CAD systems (IICAD) can be developed for different purposes. The objective of this article is to emphasize the advantages of the use of IICAD systems in comparison with the classic systems. The article shows a... more
Integrated intelligent CAD systems (IICAD) can be developed for different purposes. The objective of this article is to emphasize the advantages of the use of IICAD systems in comparison with the classic systems. The article shows a structure of one such developed system, namely the IICADv system. This system is used for automatization of activities undertaken during the realization of certain phases of the process of designing of shafts, especially the synthesis phase. The development of a module for computation of the shaft and integration of the entire system was performed in the C# programming language, while shaping of the shaft was performed in the CATIA system. The interlinking was performed thanks to previously modelled basic 3D models. In such way, utilizing the advanced IICADv system, the computation and shaping of the shaft is done almost instantly. The results of the use of the IICADv systems are generated final 3D models of the shaft, ready for use by numerous other applications.
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The scope of research of this paper is designing, modelling and analysis of tools for cold forging of rolling bodies of roller bearings. Basic principles of metal processing using plastic deformation are presented for better understanding... more
The scope of research of this paper is designing, modelling and analysis of tools for cold forging of rolling bodies of roller bearings. Basic principles of metal processing using plastic deformation are presented for better understanding of the forging process. Geometric tool modelling required knowledge of interconnections between individual tool elements, and their role in the forging process. The paper presents geometric and mathematical modelling of tools, and simulations of their operation. This presented a complete overview of movements of individual tool elements, which improved its functionality. In order to minimise errors in tool making and its stability, stress analysis and material yield at forging were taken into consideration.
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The subject of this paper is conceptual design and stress analyses of the composite frame for a special mauntain bike. The existing solutions for frames of this type were analyzed, and the design was conceptualized, which was thoroughly... more
The subject of this paper is conceptual design and stress analyses of the composite frame for a special mauntain bike. The existing solutions for frames of this type were analyzed, and the design was conceptualized, which was thoroughly analyzed for extreme loads occurring on the Dirt Jump Mountain Bike Frames. By using the methodology of conceptual design, we have obtained a conceptual solution of the frame, which has been evaluated as optimal one based on a set of criteria. We later confirmed this hypothesis by the stress and other analyzes we carried out to validate the frame, and found that the chosen conceptual solution really meets all the criteria.
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This paper presents the process of developing an integrated intelligent CAD system (IICAD) for synthesis and stress-deformation analysis of pressure vessels. The name of the system is IICAD PP system. The goal of the paper is to present... more
This paper presents the process of developing an integrated intelligent CAD system (IICAD) for synthesis and stress-deformation analysis of pressure vessels. The name of the system is IICAD PP system. The goal of the paper is to present procedures and steps to develop IICAD system for specific type of products. These procedures and steps can be used to develop IICAD system for any type of specific products or family of products. IICAD PP system can help engineers during calculation and design of pressure vessels. The paper shows that IICAD PP system enables quick calculations of design parameters, automatic generations of 3D geometrical model and automatic conduction of numerical analysis for stress and deformation. All these design activities take a lot of time from engineers if they are done using conventional methods.
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This article presents architecture of integrated intelligent computer-aided design system for designing mechanical powertransmitting mechanisms (IICADkmps). The system has been developed in C# program environment with the aim of... more
This article presents architecture of integrated intelligent computer-aided design system for designing mechanical powertransmitting mechanisms (IICADkmps). The system has been developed in C# program environment with the aim of automatising the design process. This article presents a modern, automated approach to design. Developed kmps modules for calculation of geometrical and design characteristics of mechanical power-transmitting mechanisms are described. Three-dimensional geometrical parameter modelling of mechanical power-transmitting mechanisms was performed in the computer-aided design/computer-aided manufacturing/computer-aided engineering system CATIA V5. The connection between kmps calculation modules and CATIA V5 modelling system was established through initial threedimensional models – templates. The outputs from the developed IICADkmps system generated final three-dimensional virtual models of mechanical power-transmitting mechanisms. Testing of the developed IICADkmps system was performed on friction, belt, cogged (spur and bevel gears) and chain transmitting mechanisms. Also, connection of the developed IICADkmps system with a device for rapid prototyping and computer numerical control machines was made for the purpose of additional testing and verification of practical use. Physical prototypes of designed characteristic elements of mechanical power-transmitting mechanisms were manufactured. The selected test three-dimensional virtual prototypes, obtained as an output from the developed IICADkmps system, were manufactured on the device for rapid prototyping (three-dimensional colour printer Spectrum Z510) and computer numerical control machines. Finally, at the end of the article, conclusions and suggested possible directions of further research, based on theoretical and practical research results, are presented.
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The proven safe operation and the high availability of aerial ropeways is mainly thanks to their design. This is based on the manufacturer’s extensive experience as well as the strict application of the relevant rules and norms. In that... more
The proven safe operation and the high availability of aerial ropeways is mainly thanks to their design. This is based on the manufacturer’s extensive experience as well as the strict application of the relevant rules and norms. In that regard, this paper describes an analysis of the haulage ropes on ropeways in case of accidental loads. In solving this problem, analyzed ropeway system with sufficient accuracy was modeled as a system with three degrees of freedom. For solving differential equations we have used the software “Wolfram Mathematica”. At the end of the paper, we discuss the results of the dynamic forces in the haulage ropes in a certain time interval, and the results of the safety factors which in this case are sufficient to ensure reliable operation of the system.
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Small computer software for analysis of stress concentration factors was developed at Faculty of Mechanical Engineering Sarajevo. Software name is AlfaK. Developing process of the software was presented in previous papers of same authors,... more
Small computer software for analysis of stress concentration factors was developed at Faculty of Mechanical Engineering Sarajevo. Software name is AlfaK. Developing process of the software was presented in previous papers of same authors, in this paper testing of the software was done using numerical analysis. To test accuracy of AlfaK software, analysis of stress concentration factors was done numerically using {CATIA} {V5} commercial software for characteristic geometrical changes in form. Obtained data from numerical analysis are used for comparison with results from AlfaK, and on that way, accuracy of AlfaK software is investigated.
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In this paper simulation model which enables quick analysis of elastic rotor natural frequency modes is developed using Matlab. This simulation model enables users to get dependency diagram of natural frequency in relation to diameter and... more
In this paper simulation model which enables quick analysis of elastic rotor natural frequency modes is developed using Matlab. This simulation model enables users to get dependency diagram of natural frequency in relation to diameter and length of the rotor,density of the material or modulus of elasticity. Testing of the model is done using numerical analysis in SolidWorks software.
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The dissertation presents the architecture of integrated CAD system for design of mechanical power transmissions (ICADkmps). The system has been developed in C# program environment. The goal of the system is the mechanical power... more
The dissertation presents the architecture of integrated CAD system for design of mechanical power transmissions (ICADkmps). The system has been developed in C# program environment. The goal of the system is the mechanical power transmissions design process automatization. Dissertation presents a modern, automated approach to design. Described are the developed kmps modules for calculation of geometrical and constructional characteristics of mechanical power transmissions. 3D geometrical and parametrical mechanical power transmissions modelling is performed in CAD/CAM/CAE system CATIA V5. The connection between kmps calculation modules and CATIA V5 modelling system has been established through initial 3D models – templates. The output from developed ICADkmps system are generated, final 3D virtual mechanical power transmissions prototypes. The testing of developed ICADkmps system is performed on gear (spur gears and bevel gears), belt, friction and chain power transmissions. Also, connection of developed ICADkmps system with device for rapid prototyping and CNC machines has been performed with the goal of additional testing and verification of practical use. Physical prototypes of designed characteristic elements of mechanical power transmissions have been manufactured. The selected, test 3D virtual prototypes, achieved as output from developed ICADkmps system, have been manufactured on a device for rapid prototyping (3D color printer Spectrum Z510) and CNC machines. Finally, at the end of dissertation the conclusive considerations and suggested feasible directions of further research, based on theoretical and practical research results, have been presented.
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Computer software for analysis of stress concentration factors was developed at Faculty of Mechanical Engineering Sarajevo. The software name is AlfaK. To test AlfaK software, analysis of stress concentration factors was done by using... more
Computer software for analysis of stress concentration factors was developed at Faculty of Mechanical Engineering Sarajevo. The software name is AlfaK. To test AlfaK software, analysis of stress concentration factors was done by using various others computer software. In addition to AlfaK, analysis was performed using Microsoft Excel modules developed within the book [1]. The goal of this paper is to show that with a good knowledge of programming languages, small software applications can be developed for specific engineering problems, in order to avoid purchasing expensive software packages.
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The main goal of this paper is to give an example of how numerical FEM simulation in combination with parametric design features can be used very effectively in estimating stress in welded joints on pressure vessels. In order to achieve... more
The main goal of this paper is to give an example of how numerical FEM simulation in combination with parametric design features can be used very effectively in estimating stress in welded joints on pressure vessels. In order to achieve this goal, authors choose a specific pressure vessel design for compressed air in accordance with specialised literature. A complex analytical calculation was conducted followed by a numerical simulation in the CATIA V5 software. All parts of the pressure vessel were designed with the parametric design feature that the CATIA V5 software offers. In this way, quick design changes where possible. Authors choose 3 different versions of the same pressure vessel where the geometry was modified to find the best possible solution. Also, welded joints were simulated as a single part using the more common basic workbenches of the CATIA V5 software environment instead of specialised welding workbenches which cost extra. Finally, a summarize in form of a diagram is given where analytical and numerical results are compared. The paper concludes with a analyze of analytical and numerical results by estimating the error from the numerical simulation and giving guidlines for further investigation.
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This paper is based on the basic concept of ISO System of tolerance. We will discuss fundamental deviation, fundamental tolerance, and the calculation of tolerance according to the symbol used. The focuse of the paper is software for... more
This paper is based on the basic concept of ISO System of tolerance. We will discuss fundamental deviation, fundamental tolerance, and the calculation of tolerance according to the symbol used. The focuse of the paper is software for quick calculation and analysis of ISO system of tolerances, deviations and fits. Begining of the paper explanes the basic concepts of ISO system of tolerances and fits, after that, paper describes in detail the design and implementation of above mentioned software. The software is named ETolerances. Except the description of design and implementation proces, paper explains how to use E-Tolerance software. In the end it was said a few words about the possibilities of upgrading the software.
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In this paper, the results of the research of three-dimensional (3D) geometric parameter modelling of different types of standard catalogue gears: spur gears, bevel gears and worms using CATIA V5 software system (modules: Sketcher, Part... more
In this paper, the results of the research of three-dimensional (3D) geometric parameter modelling of different types of standard catalogue gears: spur gears, bevel gears and worms using CATIA V5 software system (modules: Sketcher, Part Design, Generative Shape Design). It is advisable to make the parameterisation of gears for the purpose of automatization of its designing. Parameter modelling application makes possible the control of created geometry of 3D gear model through parameters integrated in some relations (formulas, parameter rules and so on). Geometry of 3D gear model is changed by changes of these parameters values. Designer could generate more designing solutions by gear parameterisation. Final taking into consideration shows that functionality of parameter associatively must obligatory apply in interaction with previous traditional geometric modelling approach. Modelling methodology and functionality that is described by selected examples can be used in any category of industry and in any process.
Research Interests:
A frequently repeated machine element in almost every mechanical design, regardless of the field of use, is the power screw (leadscrew). It`s main purpose is to transform rotary motion into linear, and vice versa, whereat the last... more
A frequently repeated machine element in almost every mechanical design, regardless of the field of use, is the power screw (leadscrew). It`s main purpose is to transform rotary motion into linear, and vice versa, whereat the last mentioned option is rarely used since self-locking of the power screw is no longer provided. Every machine element has different advantages and disadvantages but all come together in one unique technical parameter which is valid for every machine, the degree of efficiency. Irrespective of many advantages power screws have, it`s wider use in other applications is restricted due to it`s low degree of efficiency. This paper should give some theoretical proposals on how to increase the degree of efficiency on power screws. Authors present several ways to increase the degree of efficiency by starting to increase the pitch, changing the thread geometry (profile), assuming a lower coefficient of drag, using multi-start screws and finally giving a suggestion which includes a combination of some mentioned solutions. It is important to emphasize that all mentioned suggestions are solutions through out the design of power screws, not considering tribological phenomenons like coefficient of drag or used material.
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Modern commercial integrated CAD/CAM/CAE systems have a module for analysis of deformity and stress condition of structures, and it is based on Finite Element Method (FEM). Use of FEM method for structures analysis is conditioned by... more
Modern commercial integrated CAD/CAM/CAE systems have a module for analysis of deformity and stress condition of structures, and it is based on Finite Element Method (FEM). Use of FEM method for structures analysis is conditioned by purchase of expensive CAD/CAM/CAE systems. This paper provides solutions that avoid need for purchase of these types of systems, thanks to the development of proper software for specific structures analysis. The possibilities of the developed software, named 2D-FEM, which is based on FEM method and intended for deformity and stress conditions analysis of the 2D truss beams, are described in this paper. Software 2D-FEM is developed in C# Key words: software, programming language, and its possibilities are demonstrated in the example of deformity and stress conditions of the selected 2D truss beam.
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New technologies which are mainly based on high speed and precision (robots, manipulators, machine tools, etc.) impose special requirements for gears. Other technologies such as telescopes, radar systems, antenna systems, etc., require... more
New technologies which are mainly based on high speed and precision (robots, manipulators, machine tools, etc.) impose special requirements for gears. Other technologies such as telescopes, radar systems, antenna systems, etc., require high accuracy and speed of positioning. Common for all these facilities and devices are transfer of information, energy and materials from one state to another without bringing their own faults in the system. So, it is important that gears do not have excessive internal backlash. Harmonic drive gears are one of the newer gears which in there is no internal backlash. Harmonic drive gears have other advantages such as high capacity output bearing, high torque capacity, excellent positioning accuracy and repeatability, compact design, high single stage ratios, high torsional stiffness, high efficiency, simple installation and assembly, etc. In this paper it is described some cases of using Harmonic drive gear in machine tools.
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A common feature of all engines with internal combustion is the need for a gearbox. This constructive requirement is justified with the practical fact that, if the torque and power characteristics of an engine would be geared directly to... more
A common feature of all engines with internal combustion is the need for a gearbox. This constructive requirement is justified with the practical fact that, if the torque and power characteristics of an engine would be geared directly to the working bodies of a consumer machine (such as road wheels) it could not ensure enough torque throughout the vehicles operational speed range. According to the operational task that the vehicle should manage, several solutions are used. Automatic (planetary) gearboxes and CVTs (Continuously Variable Transmission) allow gear ratio changes without power interruption. In other cases such as race car technology, multiple ratio gearboxes are caused by rules and regulations. In order to optimise gearbox performance, a wide range of analytical methods are used. One of the most frequently used, is the traditional straight line plot of road speed against engine rpm (rounds per minute) as a method of choosing ratios. Unlike this method, tractive effort curves include much more information and so they can publish how well ratios are suited to the engine`s characteristics as well as the fundamental track parameters that driven their choice. This paper should state out the benefits of tractive effort curves in gearbox analyse. In order to maintain this, an instance from the Formula 1 was taken. Based on onboard video records of different tracks (in this example the tracks in Monaco and Monza were chosen), authors could approximately determine points of gear change and top speeds achieved within a certain ratio. These information allow to set a group of tractive effort curves (as well as several road speed – engine rpm diagrams). A huge amount of data, related not just to the gearbox, can be obtain when comparing results of these two methods and using them together.
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The paper is based on the presentation of active magnetic bearings (AMB) which, in the world of technology, more and more overtake a leading position. AMB are increasingly used in all areas in which we have a rotation of one element in... more
The paper is based on the presentation of active magnetic bearings (AMB) which, in the world of technology, more and more overtake a leading position. AMB are increasingly used in all areas in which we have a rotation of one element in relation to others. Special emphasis is placed on integrating AMB in the production process, primarily the possibility of using these bearings on assembly lines and machine tools. Various manufacturing processes require very high accuracy and almost minimal vibration during transportation of products at production line. The automotive industry is such an example. Anywhere welding is performed, such as, during transportation of a car at assembly line, AMB can contribute to increase accuracy, reduce maintenance costs and increase lifetime of bearings. AMB have almost unlimited lifetime, which would mean that the manufacturing process can work almost without stopping. We know that we must stop the production when replacing the classic rotating bearings. From the main spindle bearings of machine tools is required less tolerance and vibration, but for classic roller bearings today is very difficult to fulfill that requirements. Therefore, designers are increasingly deciding to use AMB.
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For the purpose of the higher education integration into the European area, there is intensive work at the curriculum innovation at the universities in Bosnia and Herzegovina. To this end, within the framework of CDP+ (Course Development... more
For the purpose of the higher education integration into the European area, there is intensive work at the curriculum innovation at the universities in Bosnia and Herzegovina. To this end, within the framework of CDP+ (Course Development Program +) project of the WUS (World University Service) from Austria, the modification of the course „Computer-Aided Design” was done at the Faculty of Mechanical Engineering Sarajevo. Innovation was done in accordance with the similar courses which are taken at some other EU universities. The results of external and internal evaluation, which were reached after the end of the above mentioned course, are shown in this study. The course is attended by the students in the third year of the first cycle of the studying (BSc) in the fall semester.
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In this paper, the results of the research of three-dimensional (3D) parameter modelling of different types of standard catalogue gears using CATIA V5 software system. Gears modelling by computers are based on geometric and perspective... more
In this paper, the results of the research of three-dimensional (3D) parameter modelling of different types of standard catalogue gears using CATIA V5 software system. Gears modelling by computers are based on geometric and perspective transformation which is not more detail examined in the paper because of their large scope. Parameter modelling application makes possible the control of created 3D gear model through previous defined parameter which is based on relations and geometric constraints (parallelism, perpendicular, etc.). The final shape of gear changes by changing of values of characteristic independent changeable parameters, and that makes possible model creation in short time. Obtained 3D gear model from CATIA V5 system is used as the base for technical documentation making, analysis of stress and deformation by Finite Element Method (FEM), generating of NC/CNC programs for production of the parts on machine (CAM/NC), Rapid Prototyping (RP), etc. Final taking into consideration shows that functionality of parameter associatively must obligatory apply in interaction with traditional geometric modelling approach that appears until now. Modelling methodology and functionality that is described by selected examples can be used in any category of industry and in any process.
Research Interests:
In this paper, the result of the research of threedimensional (3D) geometric parameter modelling of the two frequently used types of mechanical transmissions, belt transmissions (belt pulley with cylindrical external surface, or more... more
In this paper, the result of the research of threedimensional (3D) geometric parameter modelling of the two frequently used types of mechanical transmissions, belt transmissions (belt pulley with cylindrical external surface, or more exactly, with pulley rim) and transmissions gear (bevel gears) using CATIA V5 software system, is shown. Parameter modelling application makes possible the control of created geometry of 3D model through parameters integrated in some relations (formulas, parameter rules and so on). All dimensions, or more exactly, geometric changeable parameter of belt pulley and gear, can be expressed through few characteristic fixed parameters. Geometry of 3D mechanical transmission model is changed by changes of these parameters values. Designer could generate more designing solutions by mechanical transmission parameterisation. Final taking into consideration shows that components parameterisation must obligatory apply in interaction with previous traditional geometric modelling approach.
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Growing consumer demand for high-quality and cheaper products requests implementation of new technology (Computer-Aided Design – CAD, Computer-Aided Manufacturing – CAM, Computer- Aided Engineering – CAE). Efficient implementation of... more
Growing consumer demand for high-quality and cheaper products requests implementation of new technology (Computer-Aided Design – CAD, Computer-Aided Manufacturing – CAM, Computer- Aided Engineering – CAE). Efficient implementation of CAD/CAM/CAE systems is based on basic principals of planning. Manufacturers who do the methodical implementation of CAD/CAM/CAE systems perceive quality growth of their own products, thereby keep the competitiveness in the market. Therefore it is very important to do the methodical implementation of CAD/CAM/CAE systems.
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This project presents results of research on possibilities of geometrical and parametric modelling of real mechanical parts, utilizing currently the most modern CAD/CAM/CAE software system CATIA V5. The list of pictures, tables and... more
This project presents results of research on possibilities of geometrical and parametric modelling of real mechanical parts, utilizing currently the most modern CAD/CAM/CAE software system CATIA V5. The list of pictures, tables and symbols is presented in the beginning of the project. The language index is presented in the end of the project. The project consists of seven chapters and appendices. The area of research with clearly defined goal, method and content of research is presented in the first chapter, as well as the laboratory equipment being used (working stations and CATIA V5 system). The second chapter contains description of advantages of computer-aided design versus the conventional approach. It also contains description of certain phases of design processes and review of new design methods. The third chapter consists of basic principles of computer graphics and transformations upon which the computer modelling of mechanical design is based. The fourth chapter contains description of geometrical and parametric modelling of mechanical parts. The practical use of displayed methods is presented in the fifth chapter by the examples of geometrical and parametric modelling of different kinds of gears in the CATIA V5 system. The final considerations in the sixth chapter consist of CAD/CAM/CAE system implementation phases, as well as the consequences of its implementation. The sixth chapter shows that the functionality of parametric association has to be used in interaction with the current, traditional geometrical approach of modelling. The final seventh chapter contains literary reference.