Residual stress estimation device, residual stress estimation method, program and quality control method

摘要

PROBLEM TO BE SOLVED: To provide a residual stress estimation device, a residual stress estimation method and a program capable of appropriately estimating the residual stress on the inner surface of a cylindrical member after autofrettage processing, and a quality control method using the residual stress estimation device. provide. An estimation device (10) includes an acquisition unit (12) and an estimation unit (14). The acquisition unit 12 acquires the measured value of the residual stress on the outer surface of the cylindrical member after the autofrettage treatment, the measured value of the residual stress on the outer surface of the half-split sample, and the measured value of the residual stress on the inner surface of the half-split sample. The estimation unit 14 determines the residual stress on the outer surface of the cylindrical member after the autofrettage treatment, the residual stress on the inner surface of the cylindrical member after the autofrettage treatment, and the half-split sample, which are obtained in advance using the analysis model of the cylindrical member. Based on the relationship between the residual stress on the outer surface and the residual stress on the inner surface of the half-split sample, and the measured values of each residual stress acquired by the acquisition unit 12, the residual stress on the inner surface of the cylindrical member after autofrettage treatment is determined. presume. [Selection diagram] Fig. 1