COMPARISONS OF INTERFACIAL SHEAR STRENGTH MEASUREMENTS FOR BONDED MATERIALS AND COMPOSITE MATERIALS

摘要

Composites find application in almost every sphere of life in the modern world. It becomes important to characterize their interfacial mechanical properties. Shear behavior of composite materials is difficult to measure by direct tests unlike compressive or tensile properties. In this work, we have employed Iosipescu specimens and butt-joint specimens to measure the interfacial shear strength of model composites. We have utilized the optical technique of photoelasticity to record fringe patterns till failure. Further, we have carried out numerical simulations of the specimens in order to obtain numerical fringe patterns which allow for comparison and validation of the finite element simulations. Finally, we look at the failure in shear specimens and discuss on simulating the failure in the Iosipescu specimen using Monte Carlo simulations.