ESTIMATION METHOD OF DUCTILE FRACTURE LIMIT, ITS PROGRAM, RECORDING MEDIUM AND FRACTURE TESTING MACHINE

摘要

PROBLEM TO BE SOLVED: To provide an estimation method of a ductile fracture limit applicable to a used material in recent years when receiving a tensile load from one axial direction or when estimating a ductile fracture limit of a product or a structure receiving a tensile load and a compressive load in the different load directions, having excellent efficiency, and capable of reducing the number of tests.;SOLUTION: The critical interference stress at a fracture limit of a used material measured by performing a fracture test of the used material receiving the tensile load from one axial direction or the tensile load and the compressive load in the different load directions and the maximum interference stress at the fracture time of the used material acquired by a numerical simulation executed based on a processing condition of the used material are determined, and the maximum interference stress at the fracture time is compared with the critical interference stress at the fracture limit. Then, a processing condition wherein the maximum interference stress becomes smaller than the critical interference stress is derived, and thereby the processing condition of the same used material is derived.;COPYRIGHT: (C)2006,JPO&NCIPI