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Effect of strain rate at compressive and tensile loading of unidirectional plies in structural composites
RISE - Research Institutes of Sweden (2017-2019), Materials and Production, SICOMP. Chalmers University of Technology, Sweden.
Chalmers Univiversity of Technology, Sweden.
RISE - Research Institutes of Sweden (2017-2019), Materials and Production, SICOMP.ORCID iD: 0000-0003-3755-6419
RISE - Research Institutes of Sweden (2017-2019), Materials and Production, SICOMP. Chalmers University of Technology, Sweden.ORCID iD: 0000-0002-2627-3280
2019 (English)In: Proc. 7th ECCOMAS Thematic Conf. on the Mechanical Response of Composites. / [ed] Turon A, Maimí P, Fagerström M, European Community on Computational Methods in Applied Science (ECCOMAS) , 2019, p. 177-183Conference paper, Published paper (Other academic)
Abstract [en]

Fibre-reinforced polymer composites are widely used in structural applications due to their high specific stiffness and strength. In some applications the response of dynamically loaded composite components must be analysed. For example, in crash analyses of structural components, where very high loading rates occurs, the composite behaviour is not fully understood. For this, we present a novel transversely isotropic viscoelasticviscoplastic constitutive model for a unidirectional carbon-epoxy composite. The model is micromechanically motivated so that the matrix and fibre materials of the composite are treated as micromechanical constituents at the ply scale. Based on the Hill-Mandel condition, the phases are homogenized via the macroscopic and fluctuating strain fields. To arrive at a simple but still representative model, a simplistic ansatz is applied to the structure of the fluctuating strains leading to a non-standard homogenized response of the composite. The model is applied to the non-linear rate dependent anisotropic ply behaviour under quasi-static and dynamic loading at different off-axis angles. For a simple viscoelastic-viscoplastic prototype for the rate dependent matrix response, there is a good correlation between measured and model response of the IM7-8552 material system in compression and tension.

Place, publisher, year, edition, pages
European Community on Computational Methods in Applied Science (ECCOMAS) , 2019. p. 177-183
Keywords [en]
Constitutive model, Strain rate effects, Unidirectional composites
National Category
Applied Mechanics
Identifiers
URN: urn:nbn:se:ri:diva-42513OAI: oai:DiVA.org:ri-42513DiVA, id: diva2:1384432
Conference
7th ECCOMAS Thematic Conf. on the Mechanical Response of Composites.
Projects
ICONICFFI-Crash 2
Funder
EU, Horizon 2020, Grant 721256Vinnova, Dnr 2016-04239Available from: 2020-01-09 Created: 2020-01-09 Last updated: 2020-01-31Bibliographically approved

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http://composites2019.udg.edu/wp/wp-content/uploads/2019/09/proceeding-COMPOSITES-2019-V4.pdf

Authority records BETA

Marklund, ErikOlsson, Robin

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