The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 21, 2021
Filed:
Feb. 22, 2016
Kobe Steel, Ltd., Hyogo, JP;
Kobe Steel, Ltd., Hyogo, JP;
Abstract
Provided are a residual stress estimation method and a residual stress estimation device capable of estimating residual stress suitable for a structure in which inherent strain occupied mainly by plastic strain occurs. A constraint condition is introduced to a distribution function used in the residual stress estimation method based on an inherent strain method, the constraint condition being that a plastic-worked structure does not undergo volume change before and after working. Residual stress or elastic strain is measured from a T piece collected from the structure, and a parameter of the distribution function is optimized so as to approximate the inherent strain at each measurement point obtained from the measured value of the residual stress or elastic strain. An estimated value of the residual stress in the structure is calculated using the obtained parameter.