Digital Twin-based Cyber-Physical Quality System (DT-CPQS) concept involves automated quality che... more Digital Twin-based Cyber-Physical Quality System (DT-CPQS) concept involves automated quality checking, simulation, and prediction of manufacturing operations to improve production efficiency and flexibility as part of Industrie4.0 initiatives. DT-CPQS will provide the basis for the manufacturing process to march towards an autonomous quality platform for zero defect manufacturing in the future. Analysing sensor data from the CNC machine and vision monitoring system it was concluded that there was enough signal data to detect quality issues in a part being machined in advance using statistical/mathematical models (Smart PLS) and using machine learning algorithms. This allows the operator to take corrective actions before the resultant part ends in a quality failure and reduces the inspection time. The proposed approach forms the basis in expanding this concept to a large machine shop wherein by monitoring various parameters of the machines and state variables of the tools we can detect quality issues and develop an automated quality system using machine learning techniques.
Present work deals with the numerical investigation of a cantilever beam having I cross section m... more Present work deals with the numerical investigation of a cantilever beam having I cross section made up of piezoelectric material for its actuation capability. The beam is modeled under the assumption of Euler's Bernoulli equation. Eight cases are considered for different electrode locations. The beam was subjected to voltage loads at different locations. It was noticed that tip deflection increases with increasing applied voltage across the electrodes. Maximum tip deflection was achieved with the increase in voltage with particular electrode arrangement. In this report we have also demonstrated that for downward tip deflection, there are two values of thickness ratio of flange and web for a given tip deflection at a given applied voltage.
During LVI in fiber/epoxy composites, the dominant damage mechanisms are: matrix cracking (crack ... more During LVI in fiber/epoxy composites, the dominant damage mechanisms are: matrix cracking (crack generation), delaminating (interface failure) and fiber fracture [18]. Matrix modification using MWCNTs provides better load transfer [19] and improved
In this research work, the effect of Xenon poisoning in a Canadian Deuterium Uranium (CANDU) reac... more In this research work, the effect of Xenon poisoning in a Canadian Deuterium Uranium (CANDU) reactor for different load cycles has been examined. The three load cycles that have been analyzed are 100%-70% full power, 100%-60% Full Power (FP), and 100%-50% FP. It is considered that the CANDU reactor has operated for a full week on a particular load cycle and the maximum excess of Xenon reactivity that accumulated in the reactor during the load cycle has been estimated. After calculating the excess Xenon reactivity in a load cycle, it has been analyzed whether it is within given reactivity limit (-18 to +7 mk) provided by devices which include liquid zone controllers, absorbers and adjusters in a CANDU reactor. Further it has been also mentioned as to what are options of controlling the reactor power if this excess reactivity exceeds the limit supplied by adjusters, absorbers and liquid zone controllers. With the results of the mathematical analysis of Xenon and Iodine concentration the optimized load cycle on which the CANDU reactor should be operated has been estimated. The impact of all the three power cycles on the uranium fuel is also studied.
This research work investigates the energy absorption, and damage tolerance behavior of three pha... more This research work investigates the energy absorption, and damage tolerance behavior of three phased (carbon woven/epoxy/ multiwall carbon nanotubes) polymer composites. Five doping weight fractions of multi-wall carbon nanotubes (MWCNTs) are considered as 0, 1, 2, 3 and 4 wt.% of thermosetting epoxy resins. Low-velocity impact (LVI) tests are conducted on drop tower setup with three different velocities, 3.5, 4.5 and 5.5 m/s. Damage caused by a 10 kg, hemispherical headed cylindrical impactor is analyzed and compared. The experimental results showed an increase in the energy absorption up to 3 wt.% of the MWCNT doping. However, reinforcing above this percentage, the energy absorption is reduced due to the formation of MWCNT agglomerations. Therefore, this work proposed an optimized doping percentage for CFRP laminates. The maximum improvement of 51.83% in energy absorption was found at 3 wt.% of MWCNT reinforcement in epoxy resins.
Energy harvesters that extract energy from vibrating system with the help of piezoelectric cantil... more Energy harvesters that extract energy from vibrating system with the help of piezoelectric cantilever beam show strong potential for powering wireless devices. This paper presents numerical characterization of piezoelectric cantilever beam having rectangular cross-section to enhance the power of energy harvesters. The beam was modeled based upon Euler Bernoulli's beam theory. In this work, piezoelectric cantilever beam with 31 effects was developed to analyze the dynamic behavior of this system with the help of finite element method. It was noticed that the highest tip displacement of cantilever beam was in the second mode at 25 mm length. It was further indicated that second mode of resonant frequency provided higher voltage as compared to first mode of cantilever beam without any proof mass. But when proof mass was added at free end the voltage dropped in the second mode and increased in first mode under a proof mass of 0.40 g.
Digital Twin-based Cyber-Physical Quality System (DT-CPQS) concept involves automated quality che... more Digital Twin-based Cyber-Physical Quality System (DT-CPQS) concept involves automated quality checking, simulation, and prediction of manufacturing operations to improve production efficiency and flexibility as part of Industrie4.0 initiatives. DT-CPQS will provide the basis for the manufacturing process to march towards an autonomous quality platform for zero defect manufacturing in the future. Analysing sensor data from the CNC machine and vision monitoring system it was concluded that there was enough signal data to detect quality issues in a part being machined in advance using statistical/mathematical models (Smart PLS) and using machine learning algorithms. This allows the operator to take corrective actions before the resultant part ends in a quality failure and reduces the inspection time. The proposed approach forms the basis in expanding this concept to a large machine shop wherein by monitoring various parameters of the machines and state variables of the tools we can detect quality issues and develop an automated quality system using machine learning techniques.
Present work deals with the numerical investigation of a cantilever beam having I cross section m... more Present work deals with the numerical investigation of a cantilever beam having I cross section made up of piezoelectric material for its actuation capability. The beam is modeled under the assumption of Euler's Bernoulli equation. Eight cases are considered for different electrode locations. The beam was subjected to voltage loads at different locations. It was noticed that tip deflection increases with increasing applied voltage across the electrodes. Maximum tip deflection was achieved with the increase in voltage with particular electrode arrangement. In this report we have also demonstrated that for downward tip deflection, there are two values of thickness ratio of flange and web for a given tip deflection at a given applied voltage.
During LVI in fiber/epoxy composites, the dominant damage mechanisms are: matrix cracking (crack ... more During LVI in fiber/epoxy composites, the dominant damage mechanisms are: matrix cracking (crack generation), delaminating (interface failure) and fiber fracture [18]. Matrix modification using MWCNTs provides better load transfer [19] and improved
In this research work, the effect of Xenon poisoning in a Canadian Deuterium Uranium (CANDU) reac... more In this research work, the effect of Xenon poisoning in a Canadian Deuterium Uranium (CANDU) reactor for different load cycles has been examined. The three load cycles that have been analyzed are 100%-70% full power, 100%-60% Full Power (FP), and 100%-50% FP. It is considered that the CANDU reactor has operated for a full week on a particular load cycle and the maximum excess of Xenon reactivity that accumulated in the reactor during the load cycle has been estimated. After calculating the excess Xenon reactivity in a load cycle, it has been analyzed whether it is within given reactivity limit (-18 to +7 mk) provided by devices which include liquid zone controllers, absorbers and adjusters in a CANDU reactor. Further it has been also mentioned as to what are options of controlling the reactor power if this excess reactivity exceeds the limit supplied by adjusters, absorbers and liquid zone controllers. With the results of the mathematical analysis of Xenon and Iodine concentration the optimized load cycle on which the CANDU reactor should be operated has been estimated. The impact of all the three power cycles on the uranium fuel is also studied.
This research work investigates the energy absorption, and damage tolerance behavior of three pha... more This research work investigates the energy absorption, and damage tolerance behavior of three phased (carbon woven/epoxy/ multiwall carbon nanotubes) polymer composites. Five doping weight fractions of multi-wall carbon nanotubes (MWCNTs) are considered as 0, 1, 2, 3 and 4 wt.% of thermosetting epoxy resins. Low-velocity impact (LVI) tests are conducted on drop tower setup with three different velocities, 3.5, 4.5 and 5.5 m/s. Damage caused by a 10 kg, hemispherical headed cylindrical impactor is analyzed and compared. The experimental results showed an increase in the energy absorption up to 3 wt.% of the MWCNT doping. However, reinforcing above this percentage, the energy absorption is reduced due to the formation of MWCNT agglomerations. Therefore, this work proposed an optimized doping percentage for CFRP laminates. The maximum improvement of 51.83% in energy absorption was found at 3 wt.% of MWCNT reinforcement in epoxy resins.
Energy harvesters that extract energy from vibrating system with the help of piezoelectric cantil... more Energy harvesters that extract energy from vibrating system with the help of piezoelectric cantilever beam show strong potential for powering wireless devices. This paper presents numerical characterization of piezoelectric cantilever beam having rectangular cross-section to enhance the power of energy harvesters. The beam was modeled based upon Euler Bernoulli's beam theory. In this work, piezoelectric cantilever beam with 31 effects was developed to analyze the dynamic behavior of this system with the help of finite element method. It was noticed that the highest tip displacement of cantilever beam was in the second mode at 25 mm length. It was further indicated that second mode of resonant frequency provided higher voltage as compared to first mode of cantilever beam without any proof mass. But when proof mass was added at free end the voltage dropped in the second mode and increased in first mode under a proof mass of 0.40 g.
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