Abstract
In the present study, the distortion induced in rectangular plate of AISI 304 SS during autogenous GTA welding process is measured experimentally and further validated using Finite element (FE) analysis. The thermal histories are measured at fixed locations over the surface of the plate and the results are compared with FE analysis. The Gaussian surface and Volumetric heat source models are simulated and transient heat transfer analysis is performed. The heat source models have been tested with two different speeds. The effectiveness of change in thermal histories of the heat sources have been studied and reported. In FE analysis, the sequentially coupled thermomechanical analysis is performed using the thermal histories as input and the distortion of the plates are predicted and compared with experimental measurements. The large and small displacement theories are employed for the above purpose and the effectiveness of the theories are reported. The edge deformation of the plates have been measured and validated for both the theories. The residual stress and distortion at the mid span are predicted and discussed. The results predicted using large displacement theory is in good agreement with measured values.
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D. Venkatkumar completed B.E. and M.E. from Madurai Kamaraj University in 1999 and 2002, respectively. He is doing Ph.D. in Anna University and also working as an Assistant Professor in National Engineering College, India. His current research includes modeling and finite element simulation of temperature distribution, residual stresses and distortion of welding process.
D. Ravindran is a Professor in the Department of Mechanical Engineering at National Engineering College, India. He received his Ph.D. degree in Manufacturing Engineering from Manonmaniam Sundaranar University, India in 2005. He has published 22 papers in peer reviewed journals. His research area includes Scheduling Optimization, Natural fiber composites, Diffusion bonding and Material characterization.
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Venkatkumar, D., Ravindran, D. 3D finite element simulation of temperature distribution, residual stress and distortion on 304 stainless steel plates using GTA welding. J Mech Sci Technol 30, 67–76 (2016). https://doi.org/10.1007/s12206-015-1208-5
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DOI: https://doi.org/10.1007/s12206-015-1208-5