Determination of Strain Rate Dependent Through-Thickness Tensile Properties of Textile Reinforced Thermoplastic Composites using L-Shaped Beam Specimens

W. Hufenbach (1) , A. Hornig (1) , B. Zhou (1) , A. Langkamp (1) , M. Gude (1)

1 Institute of Lightweight Engineering and Polymer Technology (ILK)

The presented work focuses on a methodology to characterise strain rate dependent strength and elastic properties of textile reinforced composites in laminate through-thickness direction. Here, for the characterisation L-shaped beam specimens are used. The investigated composite is a fabric reinforced thermoplast made of hybrid E-glass/polypropylene yarns. The analytical solution for the determination of the through-thickness tensile strength as proposed by and is verified by means of an optical deformation analysis and is extended for thew determination of the through-thickness elastic modulus. Finally, the possibility of the strain rate dependent characterisation is investigated and a based modelling approach is used to represent the apparent strain rate dependency of the through-thickness failure onset. The methodology is successfully used to capture the material strain rate effects with the according strength values and model parameters over a strain rate range of 10s to 10 s as well as the elastic modulus.

Mots clés: A. Through-Thickness Testing; B. Mechanical Properties; C. Textile composites; D. Delamination; E. Strain Rate Dependency

Domaines: Matériaux

W. Hufenbach, A. Hornig, B. Zhou, A. Langkamp, M. Gude. Determination of Strain Rate Dependent Through-Thickness Tensile Properties of Textile Reinforced Thermoplastic Composites using L-Shaped Beam Specimens. Composites Science and Technology, 2011, ⟨10.1016/j.compscitech.2011.03.018⟩. ⟨hal-00753185⟩