Communication Dans Un Congrès Année : 2015

A general behaviour law in order to model thermoset and thermoplastic composite materials subjected to dynamic loads

Résumé

The economic and ecological constraints impose that the composites materials are more than an important issue in all areas of transportation. In order to increase the ability to react of the industrials, especially in the automotive domain, and to allow them to optimize the structure design, numerical simulation is proving to be a major asset. Therefore, it is important to be able to represent in finite element software, the behaviour of these materials from the quasi-static to rapid dynamic loadings. Since many years, several models have been suggested (mainly for quasi-static loadings) for different types of composites: unidirectional, woven, laminate, 3D... Most of these behaviour laws are usually adapted to the specificities of composite of interest. In this paper, we will present a unique model that can suit to different types of composite materials regardless of the fibres architecture and types of fibres/matrix. First, we sum up some key points about the experimental characterisation of different types of composite materials. The observations and the conclusion will lead us to present the theoretical background for the unified behaviour law. It takes into account elastic and inelastic deformations, damages and sensitivity to the strain rate, whatever the orthotropic directions of the material. The evolutions of each quantity are described through adapted functions face to the experimental data. The law also possesses coupling parameters between orthotropic directions that can take into account a better representation in case of non-standard fibre orientations. Even if numerous material parameters are driving the law, the experimental methodology of characterization is quite simple, clear and can be automated. This last point is important because the law must be available to any engineers. Some numerical validations about different types of composite materials will also be shown and will allow us to conclude about the good agreement with the experiment.
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hal-04912231 , version 1 (26-01-2025)

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  • HAL Id : hal-04912231 , version 1

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Patrick Rozycki, Laurent Gornet. A general behaviour law in order to model thermoset and thermoplastic composite materials subjected to dynamic loads. 20th International Conference on Composite Materials, Jul 2015, Copenhagen, Denmark. ⟨hal-04912231⟩
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