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Improvement and validation of a physically based model for the shear and transverse crushing of orthotropic composites
RISE - Research Institutes of Sweden, Materials and Production, SICOMP. Chalmers University of Technology, Sweden.
RISE - Research Institutes of Sweden, Materials and Production, SICOMP. Chalmers University of Technology, Sweden.ORCID iD: 0000-0002-2313-6512
RISE - Research Institutes of Sweden, Materials and Production, SICOMP.ORCID iD: 0000-0002-2627-3280
INOV Contacto Programme, Portugal.
2019 (English)In: Journal of composite materials, ISSN 0021-9983, E-ISSN 1530-793X, Vol. 53, no 12, p. 1681-1691Article in journal (Refereed) Published
Abstract [en]

This paper details a complete crush model for composite materials with focus on shear dominated crushing under a three-dimensional stress state. The damage evolution laws and final failure strain conditions are based on data extracted from shear experiments. The main advantages of the current model include the following: no need to measure the fracture toughness in shear and transverse compression, mesh objectivity without the need for a regular mesh and finite element characteristic length, a pressure dependency of the nonlinear shear response, accounting for load reversal and some orthotropic effects (making the model suitable for noncrimp fabric composites). The model is validated against a range of relevant experiments, namely a through-the-thickness compression specimen and a flat crush coupon with the fibres oriented at 45° and 90° to the load. Damage growth mechanisms, orientation of the fracture plane, nonlinear evolution of Poisson's ratio and energy absorption are accurately predicted.

Place, publisher, year, edition, pages
2019. Vol. 53, no 12, p. 1681-1691
Keywords [en]
Crushing, damage mechanics, friction, finite element analysis
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:ri:diva-36301DOI: 10.1177/0021998318807964OAI: oai:DiVA.org:ri-36301DiVA, id: diva2:1263507
Available from: 2018-11-15 Created: 2018-11-15 Last updated: 2019-06-28Bibliographically approved

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Olsson, Robin

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