Mechanisms of stress transfer and interface integrity in carbon/epoxy composites under compression loading. Part II: Numerical approach |
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| Affiliation: | 1. Department of Materials, Queen Mary University of London, Mile End Road, London E1 4NS, UK;2. Institute of Chemical Engineering and High Temperature Chemical Processes, Foundation of Research and Technology––Hellas, P.O. Box 1414, Patras 265 00, Greece;3. Department of Materials Science, School of Natural Sciences, University of Patras, Patras 265 04, Greece;1. KTH, Department of Aeronautical and Vehicle Engineering, Stockholm, Sweden;2. Department of Engineering, University of Cambridge, Cambridge, CB2 1PZ, UK;1. State Key Laboratory of Hydroscience and Engineering, Tsinghua University, Beijing 10084, China;2. School of Civil Engineering and Architecture, Zhejiang University of Technology, Hangzhou 310023, China;3. Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hong Kong, China;1. Department of Chemical Engineering, University of Missouri-Columbia, W2033 Lafferre Hall, Columbia, MO, 65211, United States;2. Department of Materials Engineering, College of Engineering, Mustansiriyah University, Baghdad, Iraq;1. Naval Research Laboratory, 4555 Overlook Av. SW, WA 20375, USA;2. Dept. of Materials Sci. & Chemical Eng., Stony Brook University, New York 11794, USA;3. UNIPRESS – Institute of High Pressure, Sokolowska 29/37, 01-142 Warsaw, Poland;1. Institute of Electronics Packaging Technology and Reliability, College of Mechanical Engineering and Applied Electronics Technology, Beijing University of Technology, Beijing 100124, China;2. Department of Engineering Mechanics, AML, Tsinghua University, Beijing 100084, China;3. University of South Carolina, 300 Main Street, Room A123, Columbia, SC 29208, USA;1. Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, Műegyetem rkp. 3, H-1111 Budapest, Hungary;2. Department of Polymer Engineering, Budapest University of Technology and Economics, Műegyetem rkp. 3, H-1111 Budapest, Hungary;3. Institute of Materials and Environmental Chemistry, Hungarian Academy of Sciences, Magyar Tudósok krt 2, H-1117 Budapest, Hungary |
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| Abstract: | The finite element method is used to get an insight into the micromechanics of the compressive behaviour of carbon fibre composites. First the developed model is validated with existing experimental data and good agreement between predictions and experiments was found. Then the FE model is used to derive the complete stress field in the fibre and the matrix in the vicinity of a fibre fracture location. It was found that the perturbation of the stress field occurs mainly in the direction transverse to the fibre axis and this could explain the failure modes observed in composites tested in compression. Finally, a parametric study was performed on the effect of matrix modulus and matrix yield stress on the compressive fragmentation process. |
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