ON THE INDENTATION FAILURE OF CARBON-EPOXY CROSS-PLY LAMINATES, AND ITS SUPPRESSION BY ELASTO-PLASTIC INTERLEAVES

摘要

Elastic and elasto-plastic modelling of indentation in CFRP cross-ply laminates has been performed. Detailed knowledge of the field solutions in the volume below the indentor forms the basis for the reported micromechanical interpretation of the observed damage in test specimens. The analysis shows that matrix cracks originate at sites of maximum tensile stress perpendicular to fibres. The predicted stress fields due to indentation show that stress concentrations occur in the interface between alternating plies.