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)

11 Citations (Scopus)
178 Downloads (Pure)

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 languageEnglish
Title of host publicationProcedia Structural Integrity
Subtitle of host publication21st European Conference on Fracture, ECF21
Pages2519-2526
Number of pages8
Volume2
DOIs
Publication statusPublished - 2016
Event21st European Conference on Fracture - Catania, Italy
Duration: 20 Jun 201624 Jun 2016

Publication series

NameProcedia Structural Integrity
PublisherElsevier
Volume2
ISSN (Print)2452-3216

Conference

Conference21st European Conference on Fracture
Abbreviated titleECF21
Country/TerritoryItaly
CityCatania
Period20/06/1624/06/16

Keywords

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

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