その場偏光顕微鏡観察におけるSFC材の破壊プロセス

概要

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The fracture process and microfracture behavior of SFC materials with different fiber surface treatments were examined under a polarized microscope in situ. We observed that the microfracture forms, such as matrix crack, void, and debonding, at fiber breakage greatly varied as the fibers or the conditions of fiber surface treatments were changed. By tracing one break in the fiber we found that microfracture forms propagated and the fracture scale became larger at each fiber breakage as the load increased. By observing fiber breakage occurring at different loads it was found that the microfracture forms and fracture scale also varied. Microfracture forms and fracture scale at fiber breakage depended not only on the interfacial strength of the fiber/matrix but also on the load. A model to describe the interfacial shear stress was proposed according to microfracture forms, and the interfacial strength for each material can be evaluated qualitatively using this model.
一般社団法人日本機械学会の論文
1996-01-25