Modeling delamination growth in composites under fatigue loadings of varying amplitudes |
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| Authors: | Benoit Landry Gabriel LaPlante |
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| Affiliation: | 1. Beijing Aeronautical Science & Technology Research Institute, Beijing 102211, China;2. Institute of Solid Mechanics, Beihang University, Beijing 100191, China;3. School of Astronautics, Beihang University, Beijing 100191, China;1. Centre of Expertise in Structural Mechanics, Department of Mechanical and Aerospace Engineering, Monash University, Australia;2. Institute of Material Science and Testing of Plastics, Montanuniversität Leoben, Leoben, Austria;3. Empa, Swiss Federal Laboratories for Materials Science and Technology, Dübendorf, Switzerland;1. Università di Parma, Dipartimento di Ingegneria Industriale, Parco Area delle Scienze 181/A, 43124 Parma, Italy;2. Università di Parma, Centro SITEIA.PARMA, Parco Area delle Scienze 181/A, 43124 Parma, Italy;1. Structural Methods and Allowables Group, The Boeing Company. Everett, WA 98204, United States;2. Dept of Mechanical and Aerospace Engineering, University of Miami, Coral Gables, FL 33124, United States;1. Department of Aerospace Engineering, Amirkabir University of Technology (Tehran Polytechnic), 424 Hafez Ave., Tehran, Iran;2. Department of Industrial, Mechanical and Aerospace Engineering, Buein zahra Technical University, Buein zahra, Qazvin, Iran |
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| Abstract: | A numerical model was developed to simulate the progressive delamination of a composite subjected to mode I fatigue loading regimes of varying amplitude. The model employs a cohesive zone approach, which combines damage mechanics and fracture mechanics, and requires only standard material data as input, namely the delamination toughness and the fatigue delamination growth curve. The proposed model was validated against delamination growth data obtained from a fatigue test conducted on a DCB specimen. The model predictions agree very well with the experimental results. This model is an initial step toward life prediction of composite structures subjected to complex fatigue regimes. |
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