Determination of Residual Stresses in Laser Spot Welding by Finite Element Method
Publish place: 13th Annual Conference of Mechanical Engineering
Publish Year: 1384
نوع سند: مقاله کنفرانسی
زبان: English
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شناسه ملی سند علمی:
ISME13_570
تاریخ نمایه سازی: 21 اسفند 1385
Abstract:
An axisymmetric finite element model is developed to predict residual stresses- both in depth and on the surface- induced by laser spot welding of 304 stainless steel. A decoupled thermo-mechanical procedure is implemented with all material properties temperature-dependant. Distribution of residual stresses fairly agrees with empirical observations. Effect of preheating on the resultant residual stresses is investigated. One of the challenges in welding simulation is determination of absorption coefficient. In this work effect of absorptivity on the residual stresses induced by laser spot welding is also inspected.
Keywords:
Finite Element – Laser Spot Welding – Residual Stress – Preheating – Absorptivity
Authors
Shahrokh Azari
Mechanical Engineering Faculty, Iran University of Science and Technology, Tehran, Iran
Parisa Hosseini tehrani
Automotive Engineering Faculty, Iran University of Science and Technology, Tehran, Iran
Mohammad Hagh Panahi
Mechanical Engineering Faculty, Iran University of Science and Technology, Tehran, Iran
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