その場SEM観察におけるCFRTPのき裂進展挙動とAE特性

概要

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The fracture behavior and crack propagation process of carbon-fiber-reinforced thermosoftened plastic (CFRTP) materials are examined under SEM in situ, and acoustic emission signals are also measured simultaneously. As a result, in the model materials fiber breakages do give rise to AE signals. In CFRTP materials, the relationships between fracture factors and AE parameters can be made clearer since the fractography technique is combined with the method of acoustic emission in real time. It is found that the crack suspended after a rapid propagation, and this phenomenon recurred although the tensile load in the experiment was increased monotonously. Corresponding to this phenomenon of crack propagation/suspense, the characteristics of AE events and power spectrum varied sensitively. Furthermore, it was shown that the degree of damage of materials during the fracture process can be evaluated by using AE cumulative energy and analysis of power spectra.
一般社団法人日本機械学会の論文
1994-08-25