Effect of through-thickness compressive stress and porosity on the tensile strength of carbon-fibre reinforced composites

Jan Rojek (1) , Sébastien Joannès (1) , Jean-Christophe Teissedre (1) , Lucien Laiarinandrasana (1) , Anthony Bunsell (1)

1 CDM - Centre des Matériaux

Low and high-porosity cross-ply CFRP specimens are manufactured by modifying the autoclave curing cycle. A custom compression setup is designed and integrated with an electromechanicaltensile rig to allow biaxial testing of the material. Tensile strength of the specimens is tested at different levels of applied through-thickness compression. A reduction of tensile strength due to through-thickness compression is observed. This effect is magnified by the presence of porosity. The ply level stress state is analysed through a three-dimensional finite element contact simulation.

Mots clés: biaxial; CFRP; porosity

Domaines: Mécanique des matériaux [physics.class-ph]; Matériaux

Jan Rojek, Sébastien Joannès, Jean-Christophe Teissedre, Lucien Laiarinandrasana, Anthony Bunsell. Effect of through-thickness compressive stress and porosity on the tensile strength of carbon-fibre reinforced composites. ICCM 22 - 22nd International Conference on Composite Materials, Aug 2019, Melbourne, Australia. ⟨hal-02282421⟩