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1. EP3267166 - RESIDUAL STRESS ESTIMATION METHOD AND RESIDUAL STRESS ESTIMATION DEVICE

Office European Patent Office
Application Number 16758785
Application Date 22.02.2016
Publication Number 3267166
Publication Date 10.01.2018
Publication Kind A4
IPC
G01N 3/08
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
08by applying steady tensile or compressive forces
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
CPC
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
G01L 1/00
GPHYSICS
01MEASURING; TESTING
LMEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
1Measuring force or stress, in general
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 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
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 OKITA KEISUKE
NAKAGAWA TOMOKAZU
YAMADA MARIKO
Designated States
Priority Data 2015043082 05.03.2015 JP
2016055059 22.02.2016 JP
Title
(DE) VERFAHREN ZUR KALKULATION DER RESTSPANNUNG UND VORRICHTUNG ZUR KALKULATION DER RESTSPANNUNG
(EN) RESIDUAL STRESS ESTIMATION METHOD AND RESIDUAL STRESS ESTIMATION DEVICE
(FR) PROCÉDÉ ET DISPOSITIF D'ESTIMATION DE CONTRAINTE RÉSIDUELLE
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.

(FR)
L'invention concerne un procédé et un dispositif d'estimation de contrainte résiduelle, dans lesquels le nombre de pièces découpées collectées pour mesurer une contrainte inhérente peut être supprimé sans réduire la précision d'estimation de contrainte résiduelle. Lorsque la contrainte inhérente est supposée être uniformément distribuée dans une direction dans une structure, l'utilisateur mesure une contrainte résiduelle à partir de pièces découpées collectées à l'intérieur d'une zone dans laquelle la contrainte inhérente est distribuée uniformément, et entre la valeur de mesure dans le dispositif d'estimation de contrainte résiduelle. Le dispositif d'estimation de contrainte résiduelle utilise la valeur de mesure donnée pour la contrainte résiduelle, estime une distribution bidimensionnelle pour une contrainte inhérente dans une surface d'analyse orthogonale à la direction dans la structure, transfère la distribution bidimensionnelle estimée pour la contrainte inhérente à la direction, et estime une distribution tridimensionnelle pour une contrainte inhérente dans la structure.