Tensile failure of laminates containing an embedded wrinkle; numerical and experimental study |
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| Affiliation: | 1. Dept. of Civil and Mechanical Engineering, University of Cassino and Southern Lazio, via G. Di Biasio 43, 03043 Cassino, Italy;2. Dept. of Structures for Engineering and Architecture, University of Naples Federico II, via Claudio 21, 80125 Naples, Italy;1. School of Science, Wuhan University of Technology, Wuhan 430070, China;2. School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, China;1. Industrial and Materials Science, Chalmers University of Technology, Hörsalsvägen 7B, SE-41296 Göteborg, Sweden;2. Swerea SICOMP AB, Mölndal, Sweden;3. GKN Aerospace Sweden AB, Flygmotorvägen, SE-46181 Trollhättan, Sweden;1. SAAB AB, Linköping, Sweden;2. Aeronautical and Vehicle Engineering/Lightweight Structures, Royal Institute of Technology, Stockholm, Sweden |
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| Abstract: | The failure of a quasi-isotropic composite laminate containing an embedded out-of-plane fibre wrinkle defect was investigated under tension loading. Laboratory test specimens with controlled severity of fibre waviness were manufactured. Along with recording load–displacement data, high resolution camera images were taken at regular intervals which monitored the initiation and interaction of different damage mechanisms during test. Three-dimensional FE models were built following the geometry of actual test specimens. The information obtained from the tests was used to develop user material subroutines, implemented in Abaqus/Explicit as continuum damage and cohesive zone models for intra- and inter-ply failure respectively. The results of the simulations showed very good correlation with test observations in terms of failure load, location of damage initiation and interaction between different damage mechanisms for a range of waviness cases tested. |
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| Keywords: | A Carbon fibres B Delamination B Fracture C Finite element analysis (FEA) |
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