Measuring and predicting the effects of residual stresses on crack propagation

A. Shterenlikht*, D. Stefanescu, M. Fox, K. Taylor, J. Quinta Da Fonseca, A. H. Sherry, P. J. Withers

*Corresponding author for this work

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

3 Citations (Scopus)

Abstract

This article presents the first part of a study on the interaction between residual stresses and crack driving force. Blunt notched CT specimens were pre-strained to introduce residual stresses at the notch, where a crack is subsequently introduced. FE modelling is used to model the specimen preload and pre-cracking. Modelling predictions are validated by two different methods. The total predicted surface residual strains are compared to image correlation measurements. The predicted residual strains were measured using neutron diffraction, both before and after fatigue cracking. The residual strain profiles show good agreement with the 3D FE model in the far field but the peak strains measured near the notch are smaller those predicted. This is a result of the low spatial resolution of the technique.

Original languageEnglish
Title of host publicationResidual Stresses VII - Proceedings of the 7th European Conference on Residual Stresses, ECRS 7
Pages77-82
Number of pages6
Publication statusPublished - 1 Dec 2006
Event7th European Conference on Residual Stresses, ECRS 7 - Berlin, Germany
Duration: 13 Sep 200615 Sep 2006

Publication series

NameMaterials Science Forum
Volume524-525
ISSN (Print)0255-5476

Conference

Conference7th European Conference on Residual Stresses, ECRS 7
CountryGermany
CityBerlin
Period13/09/0615/09/06

Keywords

  • Crack driving force
  • Finite element
  • Image correlation
  • J-integral
  • Neutron diffraction
  • Pre-loading, blunt notched CT

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