Abstract
A finite element analysis (FEA) model for predicting the weld fracture is developed using local equivalent plastic strain coupled with the stress triaxiality σm/σ (σm: hydrostatic stress, σ: equivalent stress) as a fracture criterion. In this report, this FEA model is applied to tension tests of laser welded joints. FEA results show good agreement with experimental results, such as joint strengths or fracture modes. This method enables clarification of the laser weld fracture phenomenon and the accurate fracture prediction under the varied load modes.
