Numerical Analysis for the Characteristics of Stress Distribution on Lap Laser Welding Joint of Stainless Sheet Steel

Abstract:

It gave a better strength that taking lap laser welding (llw) instead of resistant spot welding (rsw) to assemble the framework and the flankwall of stainless steel car body structure, and the fracture situations of fatigue test were different in the two welding methods. That was chiefly connected to the stress distribution and concentration of welding joint. The analyses on stress distributions and concentration factors of the two joints in different external loadings were made in this paper. The results indicate that the stress concentration factor of llw joint on the flankwall is 73.4% lower than that of rsw and the value on the framework is 81.6%. The crack initiation site of fatigue test appears at the place with the highest stress concentration, which is agreed well with the theoretical analysis.

• Periodical: Advanced Materials Research (Volumes 472-475)
• Pages: 1192-1196
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.472-475.1192
• Online since: February 2012
• Authors: Chun Yuan Shi, Lei Li, Hong Xiao Wang, Yu Xin Yao
• Keywords: Lap Laser Welding, Numerical Analysis, Stainless Sheet Steel, Stress Distribution

References

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