AE法によるSiC繊維強化ガラスの破壊過程評価

概要

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The acoustic emission (AE) technique was applied to investigate the fracture processes of a fiber-reinforced glass. Pyrex glass reinforced with silicon carbide fibers coated 140 nm thick carbon was used as the test material. The matrix cracking behavior was observed using a replication technique. The fiber breaking process was analyzed using a probabilistic fracture model in which the fiber strength distribution was considered. By comparing the AE behavior during the tensile test with the fracture process evaluation mentioned above, the AE technique proved to be effective for investigating the fracture process of the material system studied. AE signals with high amplitude corresponded to fiber breaking ; AE signals with low amplitude corresponded to matrix cracking and interfacial debonding.
日本複合材料学会の論文