FRACTURE PREDICTING DEVICE FOR SPOT WELDING PART, METHOD THEREOF, COMPUTER PROGRAM, AND COMPUTER-READABLE RECORDING MEDIUM

摘要

A fracture predicting device for a spot welding part comprising an inputting means for inputting, in a spot welding joint, a material strength, a plate thickness, a spot welding nugget diameter, a joint plate thickness, and a joint rotation angle in a tension test based on a cross tension test and/or a shear tension test, an computing means for calculating the fracture strength parameters of a spot welding part from the above material strength, the plate thickness, the spot welding nugget diameter, the joint plate thickness, and the joint rotation angle in a tension test, a parameter storing means for storing fracture strength parameters by the above types of steel, and an operating means for substituting, by a finite element method, fracture strength parameters stored in the parameter storing means into a fracture predicting expression in which deformation around a spot weld is modeled to determine a spot welding part fracture.