Fatigue behavior of laminated composites with a circular hole under in-plane multiaxial loading |
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| Affiliation: | 1. School of Aeronautics, Northwestern Polytechnical University, Xi’an 710072, China;2. Shaanxi Key Laboratory of Impact Dynamics and its Engineering Applications, Northwestern Polytechnical University, Xi’an 710072, China;3. School of Civil Aviation, Northwestern Polytechnical University, Taicang 215400, China;4. School of Mechanical Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China;1. Institute of Materials Science and Testing of Polymers, Montanuniversitaet Leoben, Austria;2. Polymer Competence Center Leoben GmbH, Austria |
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| Abstract: | A modified fiber failure fatigue model is presented for characterizing the behavior of laminated composites with a central circular hole under in-plane multiaxial fatigue loading. The analytical model presented is based on minimum strength model and fiber failure criterion under static loading available in the literature. The analysis starts with the determination of location of a characteristic curve around the hole and the stress state along the characteristic curve under in-plane multiaxial fatigue loading. Number of cycles to failure and location of failure are determined under given fatigue loading condition. Based on ply-by-ply analysis, ultimate fatigue failure and the corresponding number of cycles are determined. Analytical predictions are compared with the experimental results for uniaxial and multiaxial fatigue loading cases. A good match is observed. Further, studies are carried out for different in-plane biaxial tension–tension and biaxial compression–compression loading cases. |
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| Keywords: | Fatigue modeling Life prediction Multiaxial fatigue Circular hole Polymer matrix composite |
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