Crack length evaluation method and crack length evaluation device

摘要

Problem to be solved: to provide a crack length evaluation method and a crack length evaluation device capable of evaluating the length of an internal crack by a simple apparatus configuration.Crack length evaluation method according to the present inventionA crack length evaluation method for evaluating the length of an internal crack formed in a continuous bodyThe step of applying tensile load to the normal direction of an internal crack in an elastic deformation region without an internal crack.The step of measuring the amount of displacement on the back surface of which the internal crack of the continuum exposed with the tensile load is exposed and the inner crack is not exposed, andMagnitude of tensile loadDisplacement on the surfaceInformation about the amount of displacement on the back side and theCalculate the length of an internal crack and.Diagram