Forming induced wrinkling of composite laminates: A numerical study on wrinkling mechanisms |
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Affiliation: | 1. Department of Aeronautical and Vehicle Engineering, KTH Royal Institute of Technology, 100 44 Stockholm, Sweden;2. SAAB AB, Linköping, Sweden;1. Department of Materials and Production, Aalborg University, Fibigerstraede 16, 9220 Aalborg East, Denmark;2. Bristol Composites Institute (ACCIS), University of Bristol, Queens Building, Bristol BS8 1TR, United Kingdom;1. Université de Lyon, LaMCoS, INSA-Lyon, F-69621 Villeurbanne, France;2. Mecanium, 66 Boulevard N. Bohr, 69603 Villeurbanne, France |
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Abstract: | When manufacturing composite aircraft components consisting of uni-directional prepreg laminates, Hot Drape Forming (HDF) is sometimes used. One issue with HDF is that, in contrast to hand lay-up where normally only one ply is laid up at a time, multiple plies are formed together. This limits the in-plane deformability of the stack, thus increasing the risk of out-of-plane wrinkling during forming. In this paper mechanisms responsible for creating different types of wrinkles are explained. It is shown through simulations how the wrinkles are created as a result of interaction between two layers with specific fibre directions or due to compression of the entire stack. The simulations are compared to experimental results with good agreement. |
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Keywords: | A Prepreg C Process simulation E Forming |
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