Numerical homogenization of cracking processes in thin fibre-epoxy layers |
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| Authors: | MV Cid Alfaro ASJ Suiker CV Verhoosel R de Borst |
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| Institution: | 1. Delft University of Technology, Kluyverweg 1, P.O. Box 5058, NL-2600 GB, Delft, The Netherlands;2. Eindhoven University of Technology, P.O. Box 513, NL-5600 MB, Eindhoven, The Netherlands;1. E.T.S. d’Enginyers de Camins, Canals i Ports, Technical University of Catalonia (BarcelonaTech), Spain;2. Centre Internacional de Metodes Numerics en Enyinyeria (CIMNE), Campus Nord UPC, Edifici C-1, c/Jordi Girona 1-3, 08034 Barcelona, Spain;3. CIMEC-UNL-CONICET, Güemes 3450, Santa Fe, Argentina;1. Laboratory of Computational Physics, Institute of Applied Physics and Computational Mathematics, Beijing 100088, China;2. Center for Applied Physics and Technology, Peking University, Beijing 100071, China |
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| Abstract: | Discrete microscale fracture processes in thin fibre-epoxy layers are connected to a mesoscale traction-separation law through a numerical homogenization framework. The microscale fracture processes are studied with the finite element method, where cracking within the epoxy and debonding between fibres and epoxy is simulated by placing interface elements furnished with a mixed-mode interface damage model in between the continuum elements modelling the fibres and epoxy. It is demonstrated how the effective traction-separation response and the corresponding microscale fracture patterns under mesoscale tensile conditions depend on the sample size, the fibre volume fraction and the presence of imperfections. |
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