Paper Title:
Measuring and Predicting the Effects of Residual Stresses on Crack Propagation
  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.

  Info
Periodical
Materials Science Forum (Volumes 524-525)
Edited by
W. Reimers and S. Quander
Pages
77-82
DOI
10.4028/www.scientific.net/MSF.524-525.77
Citation
A. Shterenlikht, D. Stefanescu, M. E. Fox, K. Taylor, J. Q. da Fonseca, A. H. Sherry, P. J. Withers, "Measuring and Predicting the Effects of Residual Stresses on Crack Propagation ", Materials Science Forum, Vols. 524-525, pp. 77-82, 2006
Online since
September 2006
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Price
$32.00
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