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Author : V. Keryvin
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An Analytical Approach to Estimate the Compressive Strength of Carbon Fibre Reinforced Plastics
This study deals with the estimation of the compressive strength of carbon fibre reinforced plastics composites used in yacht racing. This property is one the key design parameters in marine engineering. The mechanism of fibre micro-buckling as well as a structural effect including the neighbouring plies of the unidirectional ply and the deformation gradient linked to the the mechanical loading are taken into account to propose an analytical model for estimating this property. The parameters involved require a number of experiments to characterise the microstructure at the level of components (fibre, matrix, ply) and the mechanical behaviour (elastoplasticity). Some of them can be estimated using a micro-mechanical approach. It is shown that estimations and experiments show good agreement on two cases: one with a constant deformation gradient, the other one in pure compression. The paramount influence of the initial misalignment of the fibre is highlighted.