109 平織り繊維強化複合材料の横方向繊維束中のき裂の進展挙動(WS 微視的破壊過程 : 実験とシミュレーション)

概要

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Tensile test of a cross-woven one-ply SiC fiber-reinforced SiC composite was carried out in a scanning electron microscope. This test allows detailed observation of the fracture behavior on the side and upper surfaces of the composite and the emphasis here is on the transverse cracking behavior. Transverse cracking patterns and other associated fracture events and their sequences are identified. Two-dimensional micromechanical models are developed to investigate the transverse cracking behavior. Potential functions describing the mechanical responses of the fiber-matrix interface and matrix are introduced and are then embedded into finite element cohesive zone models. It is shown that the model reproduces fracture sequences of debonding initiation, separation, and transition to neighboring interfaces, and formation of a main crack within a unified reasonable framework. Significance of the experimental and numerical results is given.
一般社団法人日本機械学会の論文
2000-03-16