J-Integral Calculation by Finite Element Processing of Measured Full-Field Surface Displacements

S. M. Barhli; Mahmoud Mostafavi; Ahmet Cinar; David Hollis; James Marrow

doi:10.1007/s11340-017-0275-1

J-Integral Calculation by Finite Element Processing of Measured Full-Field Surface Displacements

S. M. Barhli
, Mahmoud Mostafavi
, Ahmet Cinar
, David Hollis
, James Marrow

Research output: Contribution to journal › Article (Academic Journal) › peer-review

68 Citations (Scopus)

1059 Downloads (Pure)

Abstract

A novel method has been developed based on the conjoint use of digital image correlation to measure full field displacements and finite element simulations to extract the strain energy release rate of surface cracks. In this approach, a finite element model with imported full-field displacements measured by DIC is solved and the J-integral is calculated, without knowledge of the specimen geometry and applied loads. This can be done even in a specimen that develops crack tip plasticity, if the elastic and yield behaviour of the material are known. The application of the method is demonstrated in an analysis of a fatigue crack, introduced to an aluminium alloy compact tension specimen (Al 2024, T351 heat condition).

Original language	English
Pages (from-to)	997-1009
Number of pages	13
Journal	Experimental Mechanics
Volume	57
Issue number	6
Early online date	10 Apr 2017
DOIs	https://doi.org/10.1007/s11340-017-0275-1
Publication status	Published - Jul 2017

Keywords

J-integral
Digital image correlation
Finite element analysis
Stress-intensity factor

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10.1007/s11340-017-0275-1

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title = "J-Integral Calculation by Finite Element Processing of Measured Full-Field Surface Displacements",

abstract = "A novel method has been developed based on the conjoint use of digital image correlation to measure full field displacements and finite element simulations to extract the strain energy release rate of surface cracks. In this approach, a finite element model with imported full-field displacements measured by DIC is solved and the J-integral is calculated, without knowledge of the specimen geometry and applied loads. This can be done even in a specimen that develops crack tip plasticity, if the elastic and yield behaviour of the material are known. The application of the method is demonstrated in an analysis of a fatigue crack, introduced to an aluminium alloy compact tension specimen (Al 2024, T351 heat condition).",

keywords = "J-integral, Digital image correlation, Finite element analysis, Stress-intensity factor",

author = "Barhli, \{S. M.\} and Mahmoud Mostafavi and Ahmet Cinar and David Hollis and James Marrow",

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journal = "Experimental Mechanics",

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T1 - J-Integral Calculation by Finite Element Processing of Measured Full-Field Surface Displacements

AU - Barhli, S. M.

AU - Mostafavi, Mahmoud

AU - Cinar, Ahmet

AU - Hollis, David

AU - Marrow, James

PY - 2017/7

Y1 - 2017/7

N2 - A novel method has been developed based on the conjoint use of digital image correlation to measure full field displacements and finite element simulations to extract the strain energy release rate of surface cracks. In this approach, a finite element model with imported full-field displacements measured by DIC is solved and the J-integral is calculated, without knowledge of the specimen geometry and applied loads. This can be done even in a specimen that develops crack tip plasticity, if the elastic and yield behaviour of the material are known. The application of the method is demonstrated in an analysis of a fatigue crack, introduced to an aluminium alloy compact tension specimen (Al 2024, T351 heat condition).

AB - A novel method has been developed based on the conjoint use of digital image correlation to measure full field displacements and finite element simulations to extract the strain energy release rate of surface cracks. In this approach, a finite element model with imported full-field displacements measured by DIC is solved and the J-integral is calculated, without knowledge of the specimen geometry and applied loads. This can be done even in a specimen that develops crack tip plasticity, if the elastic and yield behaviour of the material are known. The application of the method is demonstrated in an analysis of a fatigue crack, introduced to an aluminium alloy compact tension specimen (Al 2024, T351 heat condition).

KW - J-integral

KW - Digital image correlation

KW - Finite element analysis

KW - Stress-intensity factor

U2 - 10.1007/s11340-017-0275-1

DO - 10.1007/s11340-017-0275-1

M3 - Article (Academic Journal)

SN - 0014-4851

VL - 57

SP - 997

EP - 1009

JO - Experimental Mechanics

JF - Experimental Mechanics

IS - 6

ER -

J-Integral Calculation by Finite Element Processing of Measured Full-Field Surface Displacements

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