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Systematic assessment and validation of compliance-based crack closure measurements in fatigue

Record type: Article

Different methods of closure measurement and issues related to the identification of closure points are examined. Based on compliance curves obtained from crack mouth clip gauges and near-tip strain gauges, a systematic assessment of closure measurements has been made by a variety of non-subjective methods. Closure results obtained from compliance curves are also compared with direct crack tip observations. For results obtained on a commercial Al alloy, AA2024-T351 plate, it is shown that curve fitting methods based on a combination of linear and quadratic functions provide particularly sensitive and consistent closure measurements. The potential separation of plane stress and plane strain closure effects that arise in real, three-dimensional specimens is demonstrated via a combination of global compliance measurements and the use of side-grooved specimens

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Citation

Xu, Y., Gregson, P.J. and Sinclair, I. (2000) Systematic assessment and validation of compliance-based crack closure measurements in fatigue Materials Science and Engineering: A, 284, (1-2), pp. 114-125. (doi:10.1016/S0921-5093(00)00758-9).

More information

Published date: 2000
Keywords: al alloy, fatigue, crack growth, closure measurements, shielding
Organisations: Engineering Sciences

Identifiers

Local EPrints ID: 21594
URI: http://eprints.soton.ac.uk/id/eprint/21594
ISSN: 0921-5093
PURE UUID: 23528066-ec5e-4d47-9862-7bcb80b4ea53

Catalogue record

Date deposited: 08 Feb 2007
Last modified: 17 Jul 2017 16:25

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Contributors

Author: Y. Xu
Author: P.J. Gregson
Author: I. Sinclair

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