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Elastic strains around cracked cold-expanded fastener holes measured using the synchrotron X-ray diffraction technique

Stefanescu, D.; Steuwer, A.; Owen, R. A.; Nadri, B.; Edwards, L.; Fitzpatrick, M. E. and Withers, P. J. (2004). Elastic strains around cracked cold-expanded fastener holes measured using the synchrotron X-ray diffraction technique. Journal of Strain Analysis for Engineering Design, 39(5) pp. 459–469.

URL: http://pep.metapress.com/link.asp?id=f7qp60q462841...
DOI (Digital Object Identifier) Link: http://dx.doi.org/10.1243/0309324041896470
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Abstract

In this work, the capability of the synchrotron X-ray diffraction technique to measure changes in the residual strains caused by fatigue crack growth from cold-expanded holes in an aluminium alloy plate has been investigated. The measurement technique was validated by comparing the synchrotron measurements around uncracked holes with those obtained on similar specimens using the neutron diffraction and Sachs' techniques. Measurements were performed with and without superimposed tensile mechanical loading and the results compared with analytical results. The improved spatial resolution of the synchrotron technique relative to the other methods has allowed the strain fields around a fatigue crack growing from a cold-expanded hole to be evaluated in the unloaded state and at two loading levels. Only at the higher load does the crack appear to open along its full length.

Item Type: Journal Article
ISSN: 0309-3247
Academic Unit/Department: Mathematics, Computing and Technology > Engineering & Innovation
Item ID: 4741
Depositing User: Michael E. Fitzpatrick
Date Deposited: 11 Jul 2006
Last Modified: 02 Dec 2010 19:52
URI: http://oro.open.ac.uk/id/eprint/4741
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