METHOD OF ASSESSING FRACTURES, FRACTURE ASSESSMENT DEVICE, PROGRAM AND COMPUTER READABLE RECORDING MEDIUM

摘要

In a method of assessing fractures in a metal structure, when the portion for fracture assessment has been returned from a plastic state to an elastic state, if the stress when the portion for fracture assessment is returned to the elastic state is defined as (x, y) = (s2, s1) (maximum principal stress: s1, minimum principal stress: s2) in the (x, y) coordinate plane, the fracture assessment is performed by using a re-yield stress (R) which is determined by the intersection between a straight line that satisfies the relationship y = (s1 / s2) x and the yield curve obtained from the plastic state of the portion for fracture assessment. Even when the portion for fracture assessment has been returned from a plastic state to an elastic state, the fracture assessment can be performed with great accuracy.