Path prediction of I + III mixed mode fatigue crack propagation |
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Authors: | H. F. LI C. F. QIAN |
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Affiliation: | Beijing University of Chemical Technology, Beijing 100029, China |
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Abstract: | In this paper, compact tension specimens with tilted cracks under monotonic fatigue loading were tested to investigate I + III mixed mode fatigue crack propagation in the material of No. 45 steel with the emphasis on the propagation rate expression and the path prediction. It is found that during the mode transformation process, the crack propagation rate is still controlled by the mode I stress intensity factor; and Paris equation also holds for the relationship between and ΔKI . Crack propagation path can be predicted only when both the crack mode transformation rate and propagation rate are available. |
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Keywords: | crack path prediction crack propagation rate fatigue crack propagation mixed mode crack |
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