Ranking of laminates for edge delamination resistance |
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| Affiliation: | 1. Department of Polymer Engineering, Faculty of Mechanical Engineering, Budapest University of Technology and Economics, Műegyetem rkp, 3, Budapest 1111, Hungary;2. Bristol Composites Institute, University of Bristol, Queen''s Building, University Walk, Bristol BS8 1TR, United Kingdom;1. Macromolecular Science and Engineering, University of Michigan, 2800 Plymouth Road, Rm. 3006E Building 28 NCRC, Ann Arbor, MI, 48109, USA;2. Civil and Environmental Engineering, University of Michigan, 2350 Hayward Ave., Ann Arbor, MI, 48109, USA;3. Materials Science and Engineering, University of Michigan, 2300 Hayward Ave., Ann Arbor, MI, 48109, USA;1. Department of Environmental Health, Harvard T.H. Chan School of Public Health, Boston, USA;2. Departments of Biostatistics and Epidemiology, Harvard T.H. Chan School of Public Health, Boston, USA;3. Roy J. Carver Biotechnology Center, University of Illinois, Urbana, USA;4. Department of Pathobiology, Institute for Genomic Biology, and Carle Illinois College of Medicine, University of Illinois, Urbana, USA;5. Department of Food Science and Human Nutrition and Institute for Integrative Toxicology, Michigan State University, East Lansing, USA;6. Departments of Environmental Health and Epidemiology, Harvard T.H. Chan School of Public Health, Boston, USA;7. Department of Comparative Biosciences and Institute for Genomic Biology, University of Illinois, Urbana, USA;1. School of Astronautics, Beihang University, Beijing 100191, China;2. Technique Dept., Shanghai Electric Wind Power Group Co., Ltd., Shanghai 200241, China;3. College of Aerospace Engineering, Chongqing University, Chongqing 400044, China;4. Beijing Key Laboratory of Civil Aircraft Structure and Composite Materials, BASTRI, Beijing 102211, China |
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| Abstract: | Edge delamination is a problem of some concern in laminated fibre composites. In the present study, energy release rates for potential edge delamination propagation are calculated using finite element techniques, for various stacking sequences of quasi-isotropic laminates under tension loading. Gap elements are included in the calculations to prevent non-physical material interpenetration that can occur in calculations. The results permit a ranking of stacking sequences based on minimizing the energy release rate. Experiments show that the newer, high toughness resin systems are effective in reducing strength loss associated with edge delamination under monotonic loading. |
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