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Boundary element simulation of fatigue crack growth in multi-site damage.

Price, R.J. and Trevelyan, J. (2014) 'Boundary element simulation of fatigue crack growth in multi-site damage.', Engineering analysis with boundary elements., 43 . pp. 67-75.

Abstract

This paper presents an efficient and automatic scheme for modelling the growth of multiple cracks through a two-dimensional domain under fatigue loading based on linear elastic fracture mechanics. The dual boundary element method is applied to perform an analysis of the cracked domain and the J-integral technique is used to compute stress intensity factors. Incremental crack propagation directions are evaluated using the maximum principal stress criterion and a combined predictor–corrector algorithm implemented for propagation angle and increment length. Criteria are presented to control the mesh used on the slower growing cracks in the domain, improving computational efficiency and accuracy by the use of virtual crack tips to avoid the need for severe mesh grading. Results are presented for several geometries with multi-site damage, and sensitivity to incremental crack length is investigated. The scheme demonstrates considerable advantages over the finite element method for this application due to simplicity of meshing, and over other boundary element formulations for modelling domains with large ranges of crack growth rates.

Item Type:Article
Keywords:Dual BEM, Fracture, Fatigue, Multi-site damage.
Full text:(AM) Accepted Manuscript
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Status:Peer-reviewed
Publisher Web site:http://dx.doi.org/10.1016/j.enganabound.2014.03.002
Publisher statement:NOTICE: this is the author’s version of a work that was accepted for publication in Engineering Analysis with Boundary Elements. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Engineering Analysis with Boundary Elements, 43, 2014, 10.1016/j.enganabound.2014.03.002.
Date accepted:No date available
Date deposited:29 May 2014
Date of first online publication:June 2014
Date first made open access:No date available

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