抄録
We originally developed the micro-test system for evaluating the shearing strength under pull and push loadings. The evaluation of the static and cyclic shearing strength at the interface between fiber and the resin-matrix in PMC can be made at room temperature by using this test system. The sample with single boron fiber embedded in the resin was prepared. Then the shearing strength was examined at the fiber/resin interface by performing pulling out and pushing test for the fiber. The shear stress at which the first separation occurs between the fiber and resin was studied through the load-displacement response during the pull and push loadings. Moreover, the interface shear stress was discussed from FEM analysis; the shear stress reaches the maximum at the interface around the near top surface, which is the side the fiber is loaded on. It is suggested that the first separation between the fiber and resin-matrix is induced by this shear stress.
