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1. (WO2018190042) METHOD FOR MEASURING RESIDUAL STRESS

Pub. No.:    WO/2018/190042    International Application No.:    PCT/JP2018/008965
Publication Date: Fri Oct 19 01:59:59 CEST 2018 International Filing Date: Fri Mar 09 00:59:59 CET 2018
IPC: G01L 1/00
G01L 1/25
Applicants: KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL, LTD.)
株式会社神戸製鋼所
Inventors: FUKUI, Toshihide
福井 利英
TAKAMATSU, Hiroyuki
高枩 弘行
Title: METHOD FOR MEASURING RESIDUAL STRESS
Abstract:
A method for measuring residual stress, wherein the method includes: a residual stress value measurement step for measuring a residual stress value, which is a value of residual stress at a specific location on a specimen or test object, through an X-ray diffraction method; a conversion stress value measurement step for measuring a conversion stress value, which is a value of stress at the specific location and has a correlation with the residual stress value, through an acoustoelasticity method; a correction coefficient calculation step for calculating a correction coefficient for converting the conversion stress value to the residual stress value on the basis of the residual stress value measured in the residual stress value measurement step and the conversion stress value measured in the conversion stress value measurement step; and a correction step for correcting conversion stress values obtained by measuring a plurality of locations on the specimen through the acoustoelasticity method to respective residual stress values on the basis of the correction coefficient.