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More and more automobile companies are going for weight reduction of their vehicles for fuel economy and pollution control. At elevated temperatures aluminum sheet alloys 6061 and 7075, the blank temperature effect on forming behavior and damage factor of these sheets is the objective of the present study. In automotive parts the aluminum alloys have good corrosion resistance, high strength to weight ratio and low formability of aluminum sheets limits in some products with complex shapes. The elevated forming process is intended to overcome this problem. An insight into such a study will throw light on the different temperatures required by the above materials when they are made into TWBs. Using ANSYS a series of simulations were carried out in the present investigation on the formability behaviour of deep drawing of aluminium alloys in the temperature range 200-500°C.
2010 •
Lightweight design is essential for an economic and environmentally friendly vehicle. Aluminium sheet metal is well known for its ability to improve the strength to weight ratio of lightweight structures. One disadvantage of aluminium is that it is less formable than steel. Therefore complex part geometries can only be realized by expensive multi-step production processes. One method for overcoming this
2010 •
A disadvantage of aluminium is that it is less formable than steel. One method for overcoming this disadvantage is deep drawing at elevated temperatures. In this way the formability of aluminium sheet metal can be improved significantly. This paper introduces deep drawing of aluminium sheet metal at elevated temperatures, a corresponding simulation method, a characteristic process and its optimization. The temperature and strain rate dependent material properties of a 5xxx series alloy and their modelling are discussed. A three dimensional thermomechanically coupled finite element deep drawing simulation model and its validation are presented. Based on the validated simulation model the process is optimized regarding formability and cycle time. The optimization focuses on the temperature distribution of the tooling and the blank, the punch velocity and the blank holder force.
Key Engineering Materials
Effects of Temperature on Deep Drawing of an Aluminum Alloy for Different Yield Criteria and Hardening ModelsIn this study, the influences of temperature variation in deep drawing process are investigatedby changing the temperatures of the whole blank, a part of the blank, the punch and die fordifferent yield criteria and hardening models. Von-Mises criterion with isotropic, kinematic and combinedhardening and, Hill48 and Yld2003 yield criteria with isotropic hardening are considered toform the constitutive relations. Circular, square and complex shaped parts made of AA5754 materialare used in the numerical analyses. The local heating simulations are conducted for circular blanksand the drawability of the parts are evaluated by using the Johnson-Cook failure criteria. Hot formingand quenching and local heating analyses are also carried out for a complex shaped part. The resultsobtained by the finite element analyses for different constitutive equations are compared with eachother and experimental results according to thickness strain distribution, punch force variation andrim shape of the ...
2020 •
Aluminum alloys have a high strength-to-weight ratio and proper anti-corrosion properties that are used in the automotive, shipbuilding and aerospace industries. The major problem with forming aluminum sheets is the low formability of aluminum sheets at room temperature. Therefore, in the present study, warm deep drawing (WDD) of AA5052-O aluminum alloy sheets with a thickness of 1mm was investigated at the different forming temperatures of 25, 80, 160, and 240°C (in the two isothermal and nonisothermal conditions) and punch speeds of 260, 560 and 1950 mm min-1 using experimental tests and finite elements simulation. The finite element simulation predictions show a good agreement with the experimental data. The results showed that an increase in forming temperature and a decrease in forming speed led to a decrease in forming force and an increase in cup height. Additionally, a microstructural and experimental investigation showed that the fracture of the cup corner radii occurs in th...
Applied Computer Science
FEM Simulation of Deep Drawing Process of Aluminium Alloys2015 •
This paper presents results of research with FEM simulation of sheet metal forming process. The two types of aluminium alloys from 5XXX and 6XXX series, which are used in automotive industry, were compared. The computer simulation and numerical analysis of deep drawing cup test were used to predict the ability of the forming of these alloys. The plasticity model Hill'90 was used for stamping simulations. The results of numerical simulation were validated by real experiment using sheet metal testing machine Erichsen 145-60. Both results were compared with regard to prediction accuracy in changes of thickness and ear profile.
IOP Conference Series: Materials Science and Engineering
Formability analysis of aluminum alloys through deep drawing process2016 •
2014 •
In this paper, the effects of lubricating conditions and blank holding force on deep drawing process for understanding the formability of AA 6061 aluminum alloy sheet of 2 mm thickness is studied. The numerical simulations are performed for deep drawing of square cups at three different lubricating conditions and blank holding forces. For numerical simulation PAM STAMP 2G a commercial FEM code in which Hollomon’s power law and Hills 1948 yield’s criterion is used. Two different strain paths (150x150 and 200x200) were simulated. Punch forces and dome heights are evaluated for all six conditions. Failure initiation and propagation is also observed. From the overall results, it has been noted that by increasing the lubricating conditions and blank holding forces, punch forces and dome height variations are observed by which one can predict the formability for different strain paths.
Deep drawing is an essential process used for producing cups from sheet metal in large quantities. So, understanding the mechanics of the cup drawing process helps in determining the general parameters that affect the deep drawing process. There are generally two methods of analysis: experimental and numerical. Experimental analysis can be useful in analyzing the process to determine the process variables that produce a defect free product. However, experimental work is usually very expensive and time consuming to perform. On the other hand, the numerical modeling can be used to model and analyze the process through all stages of deformation. This paper deals with the analysis of deep drawing of circular blanks into axi-symmetric cylindrical cups forming using finite element analysis. The present work emphasizes the formability of cylindrical cups using high temperature-high strain rate (HTHSR) super plastic forming process. A statistical approach based on Taguchi Techniques and finite element analysis were adopted to determine the formability of 5656 Al alloy cups. The process parameters were temperature, strain rate, coefficient of friction and blank holder velocity. The FEA results obtained using finite element software namely D-FORM were validated through the experimental results. For 6061 Al alloy, the HTHSR super plastic forming process has happened at strain rate 0.1 s-1 and temperature of 300 o C.
2018 •
Deep drawing of sheet metal is one of the most important transformation’s process in which a sheet metal blank is drawn into a forming die via a punch force. The conventional deep drawing of sheet metal techniques, known for their wide usage in several industry sectors, are experimental and expensive processes. Numerical simulation using Finite Element Methods (FEM) offers the ability of analyzing the feasibility of a process, allowing the benefit of saving time and considerably reducing costs by comparison with traditional methods. This virtual simulation requires the realization of the tools and their adjustment according to the resulting data till seizing a satisfactory adequacy of results. In this study, a Hill48 anisotropic yield criterion was adopted to express the mechanical material properties using ABAQUS/EXPLICIT software. A finite element model is developed for the 3D numerical simulation of sheet metal deep drawing process. Two aluminum alloys AA1050 and AA1100, were stu...
The International Journal of Advanced Manufacturing Technology
Modeling material behavior of AA5083 aluminum alloy sheet using biaxial tensile tests and its application in numerical simulation of deep drawing2019 •
Journal of Biological Inorganic Chemistry
Electronic structure contributions to electron transfer in blue Cu and Cu A2000 •
American Journal of Advanced Drug Delivery
Assessment of Antenatal Care Utilization and its Associated Factors Among 15 to 49 Years of Age Women in Ayder Kebelle, Mekelle City 2012/2013; A Cross Sectional StudyProcedia Engineering
Application of Loss Rates for Petroleum Products Due to Natural Wastage in Customs Procedures2017 •
arXiv (Cornell University)
A Dataset Perspective on Offline Reinforcement Learning2021 •
Revista Repertorio de Medicina y Cirugía
Conversión a hipotiroidismo en tratamiento con I131* por hipertiroidismo secundario a enfermedad de graves: Hospital de San José, Enero 2005 - Diciembre 20082009 •
Anuario De La Facultad De Derecho
La responsabilidad por el resultado en derecho penal1988 •
Matrik : Jurnal Manajemen dan Teknik Industri Produksi
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Dynamics and wave dispersion of strongly heterogeneous fluid-saturated porous media2017 •
2022 •
Molecular and Cellular Endocrinology
Adrenal hyperplasia and tumours in mice in connection with aberrant pituitary–gonadal function2009 •