Interfacial mechanical properties of fiber-reinforced ceramic composites

Abstract

The interfacial properties such as interfacial shear strength, residual clamping stress and coefficient of friction of SiC fiber-reinforced borosilicate glass composites were evaluated using a single-fiber pull-out test. Maximum interfacial shear stress was adopted as an interfacial debond criterion and Poisson's effect of the fiber due to the applied stress was considered in the present evaluation. During the single-fiber pull-out test, AE signal was measured to understand the relationship between load-time curve and interfacial debonding behavior. Interfacial debonding behavior was classified into two types that are with and without stress transfer at the debonded interface. When the shrinkage of the fiber induced by the applied tensile stress overcomes the clamp due to interfacial residual radial stress, abrupt interfacial fracture occurs. Critical condition for these behavior was derived and influence of interfacial debonding behavior on the fiber bridging mechanism was discussed.