Evaluation of Interfacial Behavior of FRP Composites in DCDC Test : Fracture of Fiber/Matrix Interface in Mode I

Abstract

A double cleavage drilled compression (DCDC) specimen has been analyzed using the boundary element method (BEM). At the same time, it was used as a CFRP model composite in order to examine the crack propagating behavior and interfacial fracture energy at the fiber/matrix interface. As a result, it was confirmed that the DCDC specimen with a symmetrical hole has a mode I stress distribution. It was shown that the DCDC test is a useful method for evaluating the interfacial behavior of fiber-reinforced plastic materials. However, both experimental and analytical approaches are needed to achieve a quantitative evaluation of the fiber/matrix interface.