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Modelling fatigue crack propagation of a cracked metallic member reinforced by composite patches

✍ Scribed by Rong Wang; A. Nussbaumer

Publisher: Elsevier Science
Year: 2009
Tongue: English
Weight: 449 KB
Volume: 76
Category: Article
ISSN: 0013-7944
DOI: 10.1016/j.engfracmech.2009.02.004

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✦ Synopsis

The concept of fracture for material elements at front of a crack for fatigue crack propagation was extended to the fatigue crack propagation of a cracked metallic member reinforced with a composite patch in this paper. From static mechanics and linear elastic fracture mechanics, force transfer on a cracked member through a composite patch was analyzed and a formula connecting the stress intensity factor with crack length was obtained. Thereafter, a fracture model for fatigue crack propagation of a repaired cracked metallic member was proposed. A new expression for the fatigue crack propagation rate has thus been derived. The expression was verified objectively by the test data. It is in good agreement with the test results.

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