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Stress intensity factors for through-thickness cracks in a wide plate: Derivation and application to arbitrary weld residual stress fields

Tan, Jeffrey Meng-Lee; Fitzpatrick, Michael E. and Edwards, Lyndon (2007). Stress intensity factors for through-thickness cracks in a wide plate: Derivation and application to arbitrary weld residual stress fields. Engineering Fracture Mechanics, 74(13) pp. 2030–2054.

DOI (Digital Object Identifier) Link: https://doi.org/10.1016/j.engfracmech.2006.10.017
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Abstract

Exact closed-form stress intensity factor (SIF) solutions have been developed for mode-I, II and III through-thickness cracks in an infinite plate. Centre-crack problems have been analysed comprehensively in the literature, but the focus has been on the effect of simple loading about the crack centre. In the current work, the formula of Sih–Paris–Erdogan was extended to consider the difference in SIF on the left and right crack tips under an asymmetric stress field. Mathematical manipulations were performed to derive exact stress magnification factors for SIF computations and simultaneously circumvent the problem of crack-tip stress singularity. The solutions so obtained are applied to derive the residual SIFs that would act on a crack growing under the influence of the residual stress fields associated with VPPA (variable polarity plasma arc) and friction stir welds, using measured residual stress profiles.

Item Type: Journal Item
ISSN: 0013-7944
Keywords: Stress intensity factors; Through-thickness centre crack; Residual stress field; Local stress perturbations; Welded plate
Academic Unit/School: Faculty of Science, Technology, Engineering and Mathematics (STEM) > Engineering and Innovation
Faculty of Science, Technology, Engineering and Mathematics (STEM)
Item ID: 8551
Depositing User: Michael E. Fitzpatrick
Date Deposited: 12 Jul 2007
Last Modified: 08 May 2019 13:35
URI: http://oro.open.ac.uk/id/eprint/8551
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