Multiscale Homogenization of a glass-PA66 Fabric Composite Behavior for crash studies

Patrick Rozycki (1) , Mamadou Adboul Mbacke (2) , Anh Tuan Dau (1)

1 GeM - Institut de Recherche en Génie Civil et Mécanique
2 IRT Jules Verne - Institut de Recherche Technologique Jules Verne [Bouguenais]

In the automotive industry, the taking into account of different environmental conditions is a major key because it assures the cars to be well designed for quite all over the world. The introduction of some composite materials such as woven thermoplastic composites then complexifies the task of the engineers because due the sensitivity of the matrix to both temperature and hygrometry; they have to manage long and expensive experimental testing. The aim of this paper is to present a numerical study based on a double homogenization in order to alleviate the constraints of experiment and let the engineers to quickly find some mechanical characteristics for their designs. First, we present the methodology and the constitutive laws (fiber and thermoplastic matrix) adapted to the first homogenization in relation with the tows. The matrix has been characterized for several environmental conditions (temperature and Relative Humidity). In a second step, we suggest the methodology to extract the behavior of the woven composite material using the numerical results of the tows and the behavior of matrix. The obtained numerical results are compared to the experiment done on the woven thermoplastic composite at different RH. It allows to expose our future prospects.

Mots clés: thermoplastic composite; homogenization; hygrometry; temperature

Domaines: Matériaux et structures en mécanique [physics.class-ph]

Patrick Rozycki, Mamadou Adboul Mbacke, Anh Tuan Dau. Multiscale Homogenization of a glass-PA66 Fabric Composite Behavior for crash studies. ECCM18 - 18th European Conference on Composite Materials, Jun 2018, Athens, Greece. pp.24-28. ⟨hal-02443111⟩