Assessment of fatigue life by FEMFAT on the weld configuration of spot welding

초록

The stability of plate structure is a very critical problem. The spot welding is practically designed by experiential decisions; so, it is inefficient and risks fatigue fracture. In real structure, multi-spot welded 'joints are more frequently used than single-spot welded joint. The fatigue behavior of multi-spot welded joints :is different from that of single-spot welded joints. The fatigue lives of spot-welding specimen and multi points spot-welding struCtUre are predicted using a FEMFAT 4.4c based on the linear finite element analysis. It is necessary to establish a reasonable and systematic design criterion for the long life design of the s:)ot-welding body structure. In this study, relative location of spot welding was chosen as parameter and the stress distribution around the spot-welding joints' subjected tensile load was numerically analyzed.

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