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1. US20180045592 - Residual stress estimation method and residual stress estimation device

Office United States of America
Application Number 15553261
Application Date 22.02.2016
Publication Number 20180045592
Publication Date 15.02.2018
Grant Number 10551258
Grant Date 04.02.2020
Publication Kind B2
IPC
G06G 7/48
GPHYSICS
06COMPUTING; CALCULATING OR COUNTING
GANALOGUE COMPUTERS
7Devices in which the computing operation is performed by varying electric or magnetic quantities
48Analogue computers for specific processes, systems, or devices, e.g. simulators
G01L 5/00
GPHYSICS
01MEASURING; TESTING
LMEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
5Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
G01N 3/06
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
3Investigating strength properties of solid materials by application of mechanical stress
02Details
06Special adaptations of indicating or recording means
G01M 15/00
GPHYSICS
01MEASURING; TESTING
MTESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
15Testing of engines
CPC
G01N 3/066
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
3Investigating strength properties of solid materials by application of mechanical stress
02Details
06Special adaptations of indicating or recording means
066with electrical indicating or recording means
G01L 5/0047
GPHYSICS
01MEASURING; TESTING
LMEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
5Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
0047measuring forces due to residual stresses
G01M 15/00
GPHYSICS
01MEASURING; TESTING
MTESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
15Testing of engines
G01N 2203/0019
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
2203Investigating strength properties of solid materials by application of mechanical stress
0014Type of force applied
0016Tensile or compressive
0019Compressive
G01N 2203/0075
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
2203Investigating strength properties of solid materials by application of mechanical stress
0058Kind of property studied
0069Fatigue, creep, strain-stress relations or elastic constants
0075Strain-stress relations or elastic constants
Applicants KOBE STEEL, LTD.
Inventors Keisuke Okita
Tomokazu Nakagawa
Mariko Yamada
Agents Studebaker & Brackett PC
Priority Data 2015-043082 05.03.2015 JP
Title
(EN) Residual stress estimation method and residual stress estimation device
Abstract
(EN)

Provided is a residual stress estimation method and a residual stress estimation device capable of suppressing the number of cut pieces to be collected for measuring inherent strain without deteriorating residual stress estimation accuracy. In a case where it is assumed that the inherent strain is uniformly distributed in one direction in a structure, a user measures residual stress from a cut piece collected in a region in which the inherent strain is uniformly distributed and inputs the measured value to the residual stress estimation device. The residual stress estimation device estimates a two-dimensional inherent strain distribution on an analysis surface perpendicular to the one direction in the structure using the input residual stress measured value, transfers the estimated two-dimensional inherent strain distribution to the one direction, and estimates a three-dimensional inherent strain distribution in the structure.