Modelling fatigue crack propagation of a cracked metallic member reinforced by composite patches |
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| Authors: | Rong Wang A. Nussbaumer |
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| Affiliation: | a School of Materials Science and Engineering, Xi’an Shiyou University, 710065 Xi’an, China
b Swiss Federal Institute of Technology, EPFL, 1015 Lausanne, Switzerland |
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| Abstract: | 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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| Keywords: | Cracked metallic member Composite patch Fatigue crack propagation Fracture model Fatigue life |
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