A phenomenological model for predicting crack growth in fiber-reinforced metal laminates under constant-amplitude loading

On the basis of the experimental observation that crack growth in fiber-reinforced-metal laminates (FRMLs) under fatigue loading tends to reach a steady state, a material constant, the equivalent crack length ( l 0) of FRMLs, is proposed. The stress intensity factor equation for FRMLs during fatigue...

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Bibliographic Details
Published in:Composites science and technology 1999-09, Vol.59 (12), p.1825-1831
Main Authors: Guo, Ya-Jun, Wu, Xue-Ren
Format: Article
Language:English
Subjects:
Applied sciences
B. Fatigue
Crack growth
D. Life predictions
Exact sciences and technology
Fiber reinforced metal laminates
Fibre reinforced metals
Metals. Metallurgy
Powder metallurgy. Composite materials
Production techniques
Stress intensity factor
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Summary:On the basis of the experimental observation that crack growth in fiber-reinforced-metal laminates (FRMLs) under fatigue loading tends to reach a steady state, a material constant, the equivalent crack length ( l 0) of FRMLs, is proposed. The stress intensity factor equation for FRMLs during fatigue is derived, and a phenomenological model for predicting crack growth in FRMLs developed. Very good agreement was achieved between the predicted fatigue lives from the phenomenological model and the test results. The present phenomenological model can be applied to both center-cracked-tension (CCT) and single-edge-notched-tension (SENT) specimens, requires no knowledge of the bridging traction and the delamination growth in FRMLs, and thus will greatly facilitate engineering application.
ISSN:0266-3538
1879-1050
DOI:10.1016/S0266-3538(99)00042-1