MICRO-MECHANICS OF FAILURE AND DAMAGE MECHANISMS FOR UNIDIRECTIONAL FIBRE REINFORCED COMPOSITE

Abstract

Damage or failure behavior of the unidirectional fibre reinforced composite, E-glass/MY750/HY917/DY063, was examined under various uniaxial loading conditions : transverse shear, transverse tensile, transverse compressive, in-plane shearing and shearing on XY face in Y direction. The failure mechanism was studied using micromechanics modeling, where the RVE was modelled by randomly distributing fibres in the matrix. The two most common failure mechanisms for the unidirectional fibre reinforced composite, interfacial debonding and matrix plastic damage, were being considered for simulation. The composite failed primarily by matrix plastic deformation under transverse shearing, transverse compressive and in-plane shearing loads. The composites, on the other hand, failed mostly by interfacial debonding under transverse tensile and shear (on XY face in Y direction) loads. These simulation results were compared to the reference papers and experimental results.