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

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

237 Downloads (Pure)


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 languageEnglish
Title of host publicationProcedia Structural Integrity
Subtitle of host publication21st European Conference on Fracture, ECF21
Number of pages8
Publication statusPublished - 2016
Event21st European Conference on Fracture - Catania, Italy
Duration: 20 Jun 201624 Jun 2016

Publication series

NameProcedia Structural Integrity
ISSN (Print)2452-3216


Conference21st European Conference on Fracture
Abbreviated titleECF21


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


Dive into the research topics of 'Obtaining the J-integral by diffraction-based strain mapping'. Together they form a unique fingerprint.

Cite this