Fracture prediction method, break prediction device, program and recording medium, and fracture determination criterion calculation method

摘要

The fracture prediction method of the present invention is a method for predicting a fracture of a joint portion in an analysis object composed of a pair of members joined to each other using a finite element method, and is set in the element model of the analysis object. A first step of obtaining at least an element size of the base material portion among the parameters; a second step of calculating, as a fracture criterion, a fracture limit moment defined by a function including the element size of the base material portion as one of variables Determining whether or not the moment applied to the joint exceeds the fracture limit moment in the deformation analysis of the element model of the analysis object, and outputting the discrimination result as a fracture prediction result of the joint And a process.