High performance computation of residual stress and distortion in laser welded 301L stainless sheets
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Osaka Univ., Mihogaoka, Ibaraki, Osaka (Japan). Joining and Welding Research Inst.
- Harbin Inst. of Technology, Harbin (China). State Key Lab. of Advanced Welding and Joining
Transient thermo-mechanical simulation of stainless plate laser welding process was performed by a highly efficient and accurate approach-hybrid iterative substructure and adaptive mesh method. Especially, residual stress prediction was enhanced by considering various heat effects in the numerical model. The influence of laser welding heat input on residual stress and welding distortion of stainless thin sheets were investigated by experiment and simulation. X-ray diffraction (XRD) and contour method were used to measure the surficial and internal residual stress respectively. Effect of strain hardening, annealing and melting on residual stress prediction was clarified through a parametric study. It was shown that these heat effects must be taken into account for accurate prediction of residual stresses in laser welded stainless sheets. Reasonable agreement among residual stresses by numerical method, XRD and contour method was obtained. Buckling type welding distortion was also well reproduced by the developed thermo-mechanical FEM.
- Research Organization:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Sponsoring Organization:
- USDOE
- Grant/Contract Number:
- AC05-00OR22725
- OSTI ID:
- 1427665
- Journal Information:
- Finite Elements in Analysis and Design, Vol. 135, Issue C; ISSN 0168-874X
- Publisher:
- ElsevierCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
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