平織ガラス繊維強化プラスチックスの疲労末期における損傷の進展と繊維の破断

概要

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Fiber breakage of plain weave glass fabric reinforced plastics (GFRP) under cyclic loading was studied. In order to observe how much the material withstood, a new type of specimens was developed and used. It had two narrow sections which suffered virtually the same fatigue damage. After one section was fatigued to the failure point, the other section was microscopically examined using an optical microscope. The number of broken fibers was counted all over the section. The following conclusions were derived from the experiments. (1) The newly developed specimen is useful for examining fatigue damage state at the final stage just before failure. (2) Under cyclic loading, an appreciable amount of fiber breakage in wefts occurs at the begining of the final stage (cycle ratio : about 0.9). The number of broken fibers rapidly increases just before the sudden failure of the specimen.
一般社団法人日本機械学会の論文
1993-12-25