43 research outputs found
Coupled Electromagnetic–Structural Simulation of Magnetic Pulse Welding
Get PDFThe present study deals with the coupled magnetic–structural analysis of magnetic pulse welding (MPW) process applied on a tubular workpiece. The study investigates the various criteria required for a successful weld between the mating members through a finite element model. The transient electromagnetic field phenomenon is coupled sequentially with mechanical phenomenon. The coupling between the magnetic field and the electrical circuit is formulated in the electromagnetic part of the model, whereas in the structural part, the impact velocities, the effective plastic strain and the shear stress induced in the workpiece are found from the numerical simulations. A viscoplastic material model with rate-dependent material properties is considered in the structural part. The effect of varying process parameters: input voltage and air gap between the two mating members on weld quality are computed through numerical simulations. Based on the results of the numerical simulations, an optimal weldability window is suggested
Multi-output response optimization for overall enhancement of mechanical characteristic using utility approach for AISI 316L austenitic stainless steel using microplasma arc welding
Get PDFThis paper presents multi-output advancement for microplasma arc welding (MPAW) process using utility methodology. It is an advanced unconventional welding process in which very thin (usually less than 1 mm) metal surfaces are joined using plasma arc. A successful trial has been made to weld 0.5-mm-thick 316L stainless steel sheet. An attempt has been made to optimize the MPAW parameters for a desired equal-weighted multi-output such as ultimate tensile strength, yield strength, percentage elongation, Young’s modulus, and weld hardness at fusion zone and heat-affected zone. The design of experiments L27 orthogonal matrix was conducted using levels of several visually successful trials. An analytical tool analysis of variance and interaction has been clubbed with utility approach to get desired aim of experimentation. As per different work application, the different preferable weight can be incorporated into the output. The confirmation test correlated with the best-desired aim of the output parameter. It was observed that overall utility for all mechanical properties and corresponding S/N ratio is enhanced with 0.28 and 0.42 values, respectively. It was found that welding speed with 49.01% and pulse time with 13.21% are the most significant parameters. The enhancement in the responses confirmed the approach of the feasibility of utility analysis which can help to enhance the product reliability for an industrial application
A brief history of mechanical engineering / Uday Shanker Dixit, Manjuri Hazarika, J. Paulo Davim
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