Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8947023 | Composite Structures | 2018 | 28 Pages |
Abstract
The present work aims at modelling the hydro-elastic behaviour of twill flax fabric-reinforced epoxy composites. These latter were manufactured using the vacuum infusion technique and aged into tap water until saturation. Their heterogeneity is taken into consideration by modelling the twill weave fabrics with two geometric paths: [0/90] and elliptical undulation. Moreover, the water diffusion coefficient and the hygroscopic expansion parameter of the flax fibre are estimated by an inverse approach exploiting the experimental results. In particular, the finite element simulations reveal high mechanical stress concentrations especially at the fibre-matrix interface caused by the differential swelling between the flax fabrics and the epoxy resin. This water absorption-induced internal stress is the main cause of damage initiation in the flax-epoxy composites, which leads to high variations of their mechanical properties and reduces their long-term sustainability.
Related Topics
Physical Sciences and Engineering
Engineering
Civil and Structural Engineering
Authors
Abderrazak Chilali, Mustapha Assarar, Wajdi Zouari, Hocine Kebir, Rezak Ayad,