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Roughness-and plasticity-induced fatigue crack closure under single overloads: finite element modelling

Roughness-and plasticity-induced fatigue crack closure under single overloads: finite element modelling
Roughness-and plasticity-induced fatigue crack closure under single overloads: finite element modelling
Results from finite element modelling of plasticity-induced crack closure (PICC) and roughness-induced crack closure (RICC) of fatigue cracks subjected to single overloads are presented. Effects of L/r(p) ratios on RICC, where L and r(p) represent crack asperity length and plastic zone size, respectively, are seen to be functionally similar to results presented previously for constant amplitude fatigue loading [Kamp N.. Parry MR, Singh KD, Sinclair I. Acta Mater 2004;52:343-53], particularly in the saturation of the influence of RICC for L/r(p(OL)) >= I, where r(p(OL)) is the overload plastic zone size. The present work is seen to map out overload regimes where RICC and PICC effects may be expected to influence crack growth transients. Comparisons of modelled and experimental closure levels, and growth rate studies are presented, with the accompanying paper [Singh KD, Khor KH, Sinclair I. Acta Mater (in press)] considering a simplified analytical representation of the effects presented here.
1359-6454
4393-4403
Singh, Konjengbam Darunkumar
f946962b-ebc4-438e-9042-de8baf2245f3
Kohr, Kern Hauw
b1f53b2a-2464-4dc7-bac7-59a06b358668
Sinclair, Ian
6005f6c1-f478-434e-a52d-d310c18ade0d
Singh, Konjengbam Darunkumar, Kohr, Kern Hauw and Sinclair, Ian (2006) Roughness-and plasticity-induced fatigue crack closure under single overloads: finite element modelling Acta Materialia, 54, (17), pp. 4393-4403. (doi:10.1016/j.actamat.2006.04.017).

Singh, Konjengbam Darunkumar, Kohr, Kern Hauw and Sinclair, Ian (2006) Roughness-and plasticity-induced fatigue crack closure under single overloads: finite element modelling Acta Materialia, 54, (17), pp. 4393-4403. (doi:10.1016/j.actamat.2006.04.017).

Record type: Article

Abstract

Results from finite element modelling of plasticity-induced crack closure (PICC) and roughness-induced crack closure (RICC) of fatigue cracks subjected to single overloads are presented. Effects of L/r(p) ratios on RICC, where L and r(p) represent crack asperity length and plastic zone size, respectively, are seen to be functionally similar to results presented previously for constant amplitude fatigue loading [Kamp N.. Parry MR, Singh KD, Sinclair I. Acta Mater 2004;52:343-53], particularly in the saturation of the influence of RICC for L/r(p(OL)) >= I, where r(p(OL)) is the overload plastic zone size. The present work is seen to map out overload regimes where RICC and PICC effects may be expected to influence crack growth transients. Comparisons of modelled and experimental closure levels, and growth rate studies are presented, with the accompanying paper [Singh KD, Khor KH, Sinclair I. Acta Mater (in press)] considering a simplified analytical representation of the effects presented here.

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More information

Published date: October 2006
Organisations: Engineering Mats & Surface Engineerg Gp

Identifiers

Local EPrints ID: 43940
URI: http://eprints.soton.ac.uk/id/eprint/43940
ISSN: 1359-6454
PURE UUID: e1ed90c2-f065-4dd8-8458-bd929e9879a4

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Date deposited: 02 Feb 2007
Last modified: 17 Jul 2017 15:16

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Contributors

Author: Konjengbam Darunkumar Singh
Author: Kern Hauw Kohr
Author: Ian Sinclair

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