Obtaining the J-integral by diffraction-based strain mapping

S. M. Barhli; L Saucedo-Mora; C. Simpson; T. Becker; Mahmoud Mostafavi; Philip Withers; T. J. Marrow

Obtaining the J-integral by diffraction-based strain mapping

S. M. Barhli, L Saucedo-Mora, C. Simpson, T. Becker, Mahmoud Mostafavi, Philip Withers, T. J. Marrow

Department of Mechanical Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference Contribution (Conference Proceeding)

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Abstract

The analysis by diffraction of crystalline materials can determine the full tensor of the elastic strains within them. Point-by-point maps of elastic strain can thus be obtained in engineering alloys, typically using synchrotron X-rays or neutrons. In this paper, a novel approach is presented to calculate the elastic strain energy release rate of a loaded crack from two-dimensional strain maps
that are obtained by diffraction. The method is based on a Finite Element approach, which uses diffraction data to obtain the parameters required to calculate the J-integral via the contour integral method. A validation of the technique is presented using a synthetic dataset from a finite element model. Its experimental application is demonstrated in an analysis of a synchrotron X-ray diffraction strain map for a loaded fatigue crack in a bainitic steel.

Original language	English
Title of host publication	Procedia Structural Integrity
Subtitle of host publication	21st European Conference on Fracture, ECF21
Pages	2519-2526
Number of pages	8
Volume	2
Publication status	Published - 2016
Event	21st European Conference on Fracture - Catania, Italy Duration: 20 Jun 2016 → 24 Jun 2016

Publication series

Name	Procedia Structural Integrity
Publisher	Elsevier
Volume	2
ISSN (Print)	2452-3216

Conference

Conference	21st European Conference on Fracture
Abbreviated title	ECF21
Country/Territory	Italy
City	Catania
Period	20/06/16 → 24/06/16

Keywords

J-integral
XRD
diffraction
EDXD
Stress-Intensity Factor
strain mapping

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@inproceedings{638451c3eb764c1d84b15471e94dea24,

title = "Obtaining the J-integral by diffraction-based strain mapping",

abstract = "The analysis by diffraction of crystalline materials can determine the full tensor of the elastic strains within them. Point-by-point maps of elastic strain can thus be obtained in engineering alloys, typically using synchrotron X-rays or neutrons. In this paper, a novel approach is presented to calculate the elastic strain energy release rate of a loaded crack from two-dimensional strain mapsthat are obtained by diffraction. The method is based on a Finite Element approach, which uses diffraction data to obtain the parameters required to calculate the J-integral via the contour integral method. A validation of the technique is presented using a synthetic dataset from a finite element model. Its experimental application is demonstrated in an analysis of a synchrotron X-ray diffraction strain map for a loaded fatigue crack in a bainitic steel.",

keywords = "J-integral, XRD, diffraction, EDXD, Stress-Intensity Factor, strain mapping",

author = "Barhli, {S. M.} and L Saucedo-Mora and C. Simpson and T. Becker and Mahmoud Mostafavi and Philip Withers and Marrow, {T. J.}",

year = "2016",

language = "English",

volume = "2",

series = "Procedia Structural Integrity",

publisher = "Elsevier",

pages = "2519--2526",

booktitle = "Procedia Structural Integrity",

note = "21st European Conference on Fracture, ECF21 ; Conference date: 20-06-2016 Through 24-06-2016",

}

Obtaining the J-integral by diffraction-based strain mapping. / Barhli, S. M.; Saucedo-Mora, L; Simpson, C. et al.

Procedia Structural Integrity: 21st European Conference on Fracture, ECF21. Vol. 2 2016. p. 2519-2526 (Procedia Structural Integrity; Vol. 2).

Research output: Chapter in Book/Report/Conference proceeding › Conference Contribution (Conference Proceeding)

TY - GEN

T1 - Obtaining the J-integral by diffraction-based strain mapping

AU - Barhli, S. M.

AU - Saucedo-Mora, L

AU - Simpson, C.

AU - Becker, T.

AU - Mostafavi, Mahmoud

AU - Withers, Philip

AU - Marrow, T. J.

PY - 2016

Y1 - 2016

N2 - The analysis by diffraction of crystalline materials can determine the full tensor of the elastic strains within them. Point-by-point maps of elastic strain can thus be obtained in engineering alloys, typically using synchrotron X-rays or neutrons. In this paper, a novel approach is presented to calculate the elastic strain energy release rate of a loaded crack from two-dimensional strain mapsthat are obtained by diffraction. The method is based on a Finite Element approach, which uses diffraction data to obtain the parameters required to calculate the J-integral via the contour integral method. A validation of the technique is presented using a synthetic dataset from a finite element model. Its experimental application is demonstrated in an analysis of a synchrotron X-ray diffraction strain map for a loaded fatigue crack in a bainitic steel.

AB - The analysis by diffraction of crystalline materials can determine the full tensor of the elastic strains within them. Point-by-point maps of elastic strain can thus be obtained in engineering alloys, typically using synchrotron X-rays or neutrons. In this paper, a novel approach is presented to calculate the elastic strain energy release rate of a loaded crack from two-dimensional strain mapsthat are obtained by diffraction. The method is based on a Finite Element approach, which uses diffraction data to obtain the parameters required to calculate the J-integral via the contour integral method. A validation of the technique is presented using a synthetic dataset from a finite element model. Its experimental application is demonstrated in an analysis of a synchrotron X-ray diffraction strain map for a loaded fatigue crack in a bainitic steel.

KW - J-integral

KW - XRD

KW - diffraction

KW - EDXD

KW - Stress-Intensity Factor

KW - strain mapping

UR - http://10.1016/j.prostr.2016.06.315

M3 - Conference Contribution (Conference Proceeding)

VL - 2

T3 - Procedia Structural Integrity

SP - 2519

EP - 2526

BT - Procedia Structural Integrity

T2 - 21st European Conference on Fracture

Y2 - 20 June 2016 through 24 June 2016

ER -

Obtaining the J-integral by diffraction-based strain mapping

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