Breaking judging device, breakage judging program and method

摘要

The fracture judgment device (1) comprises an element extraction part (22) for extracting elements included in a heat affected part formed around a spot welded part of a steel material, A reference forming limit value generating unit 23 for generating a reference forming limit value according to the reference temperature and a reference temperature, and a reference forming limit value generating unit 23 for estimating a forming limit value in the element size by changing the reference forming limit value using the element size and the tensile strength of the steel, A simulation execution unit 25 for executing deformation SIM using the input information and outputting deformation information including the maximum main deformation and the minimum main deformation of each of the elements, A main strain determination unit 26 for determining a maximum main strain and a minimum main strain of each element included in the deformation information, And it has a fracture determining section 27 that the determination whether the breaking element, each operation in the modified SIM based on the heat affected zone forming limit.