Finite element and analytical modelling of crack closure due to repeated overloads
Finite element and analytical modelling of crack closure due to repeated overloads
In this paper, investigations of crack closure due to repeated overloads are presented using finite element (FE) and simplified analytical modelling approaches. In particular, attempts are made to study the effects of overload spacing on closure levels and the underlying physical mechanisms involved. Overload closure behaviour is functionally similar for both FE and analytical approaches used and is seen to be in reasonable accord with relevant available experimental observations. In the first instance, it is noted that for double overload interactions, crack closure influence of an initial overload upon the unloading conditions of a second overload can explain much of the observed enhancement in crack growth retardation; however, for successive (repeated) overloads in plane strain, a critical influence of in-plane constraint arises to attenuate closure interactions.
crack closure, fracture, fatigue, finite element modelling, analytical modelling
835-851
Singh, Konjengbam Darankumar
cd3d76d8-16ac-4c85-89d0-ebac90e3411b
Khor, Kern Hauw
3f275928-615a-43b6-a07f-59c63b62f868
Sinclair, Ian
6005f6c1-f478-434e-a52d-d310c18ade0d
February 2008
Singh, Konjengbam Darankumar
cd3d76d8-16ac-4c85-89d0-ebac90e3411b
Khor, Kern Hauw
3f275928-615a-43b6-a07f-59c63b62f868
Sinclair, Ian
6005f6c1-f478-434e-a52d-d310c18ade0d
Singh, Konjengbam Darankumar, Khor, Kern Hauw and Sinclair, Ian
(2008)
Finite element and analytical modelling of crack closure due to repeated overloads.
Acta Materialia, 56 (4), .
(doi:10.1016/j.actamat.2007.10.046).
Abstract
In this paper, investigations of crack closure due to repeated overloads are presented using finite element (FE) and simplified analytical modelling approaches. In particular, attempts are made to study the effects of overload spacing on closure levels and the underlying physical mechanisms involved. Overload closure behaviour is functionally similar for both FE and analytical approaches used and is seen to be in reasonable accord with relevant available experimental observations. In the first instance, it is noted that for double overload interactions, crack closure influence of an initial overload upon the unloading conditions of a second overload can explain much of the observed enhancement in crack growth retardation; however, for successive (repeated) overloads in plane strain, a critical influence of in-plane constraint arises to attenuate closure interactions.
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Published date: February 2008
Keywords:
crack closure, fracture, fatigue, finite element modelling, analytical modelling
Organisations:
Engineering Mats & Surface Engineerg Gp
Identifiers
Local EPrints ID: 149093
URI: http://eprints.soton.ac.uk/id/eprint/149093
ISSN: 1359-6454
PURE UUID: 7ad2e8a8-5411-414c-90e2-947792e95681
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Date deposited: 29 Apr 2010 15:18
Last modified: 14 Mar 2024 01:05
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Author:
Konjengbam Darankumar Singh
Author:
Kern Hauw Khor
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