Three-dimensional analysis using probabilistic multiscale approaches for predicting macroscopic mechanical behaviours and failure strength in unidirectional carbon fibre-reinforced epoxy composites

B. Patamaprohm (1) , Pongsak Nimdum (1) , Jacques Renard (1)

1 CDM - Centre des Matériaux

In this study, we aim to demonstrate how to predict macroscopic mechanical behaviours and also failure strengths of unidirectional composite by taking into account material’s variations (distribution of fibre strength and variation of volume fraction) based on a probabilistic multiscale approach. Tensile test has been carried out on a number of composite specimens as a validation result. The strength distribution along fibres estimates through the single fibre test. Image analysis and pyrolysis method have been used to estimate the local and global variations of volume fraction in composite material. Then, finite element analysis with appropriate statistical probability has been performed by introducing physical phenomena. The scale effect has been expected. A good agreement between the numerical predictions and the experimental results has been observed.

Mots clés: carbon fibre; fibre breakage; multiscale modeling; probabilistic approach

Domaines: Physique [physics]; Matière Condensée [cond-mat]; Science des matériaux [cond-mat.mtrl-sci]

B. Patamaprohm, Pongsak Nimdum, Jacques Renard. Three-dimensional analysis using probabilistic multiscale approaches for predicting macroscopic mechanical behaviours and failure strength in unidirectional carbon fibre-reinforced epoxy composites. ECCM 15 - 15th European Conference on Composite Materials, Jun 2012, Venise, Italy. 7 p. ⟨hal-01109530⟩