In situ observation of multiple failure modes in carbon-epoxy laminated composites using 3D micro-computed tomography

Abstract

In situ mechanical tests on a unidirectional fiber-reinforced composite material has been performed. Single-edge notched specimen with the layup sequence of [902/02]S was utilized for to observe subsurface damage and failure progression under tensile loading. Special loading frame was designed and fabricated for the in situ tests at a synchrotron facility. Three-dimensional tomography images show multiple failure modes occurring sequentially as the applied load increases. In the present study, the interactive failure mechanism under the surface of the composite materials has been revealed.