Microscopic fatigue damage progress in CFRP cross-ply laminates |
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| Affiliation: | 1. Department of Materials Science and Engineering, National Cheng Kung University, Tainan 701, Taiwan;2. Department of Applied Physics, National University of Kaohsiung, Kaohsiung 811, Taiwan;3. Department of Materials Science and Engineering, National Formosa University, Yunlin 632, Taiwan;4. National Synchrotron Radiation Research Center, Hsinchu 300, Taiwan;1. DFG RTG 1703, Institute for Applied Stochastics and Operations Research, Clausthal University of Technology, Erzstraße 1, D-38678 Clausthal-Zellerfeld, Germany;2. DFG RTG 1703, Institute for Numerical and Applied Mathematics, University of Göttingen, Lotzestraße 16-18, D-37083 Göttingen, Germany;3. DFG RTG 1703, Wood Biology and Wood Products, University of Göttingen, Büsgenweg 4, D-37077 Göttingen, Germany;1. AMADE, Polytechnic School, University of Girona, Campus Montilivi s/n, 17071 Girona, Spain;2. IK4-IKERLAN, P.J.M. Arizmendiarrieta, 2, 20500 Arrasate-Mondragón, Gipuzkoa, Spain;3. AIRBUS Operations GmbH, Kreetslag 10, 21129 Hamburg, Germany |
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| Abstract: | Damage progress in toughened-type carbon fibre-reinforced plastic (CFRP) cross-ply laminates under tensile fatigue loading was measured using the replica technique. The laminate configuration was 0/90m/0], where m = 4, 8 and 12. The damage parameters, transverse crack density and delamination ratio, were determined. A power-law model was proposed, relating the cyclic strain range and the number of cycles at transverse crack initiation. Based on experimental data, a simple shear-lag analysis combined with the modified Paris law was conducted to model the transverse crack multiplication. An extension of the shearlag analysis for laminates containing delaminations initiating from the tips of the transverse cracks was used to conduct a modified Paris law analysis for delamination growth. |
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