DEFORMATION AND FAILURE OF A CARBON FIBRE COMPOSITE UNDER COMBINED SHEAR AND TRANSVERSE LOADING

摘要

The in-plane shear and transverse properties are measured for T800-924C carbon fibre reinforced epoxy unidirectional material. Non-linearity in the shear response is ascribed partly to plasticity and partly to micro-crack growth within the matrix. The stress—strain response under proportional and non-proportional stressing supports the use of a deformation theory of plasticity. A failure envelope is measured and presented in both stress space and in strain space for the composite; failure is associated with distributed tensile micro-cracking within the matrix.