GFRP複合材料の低温における破壊じん性

概要

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Fracture toughness of GFRP composite materials has been studied mainly from the view point of the effects of test temperature and specimen size at temperatures ranging from 300 K to 4 K. The CT specimens with cut slits of prescribed depth and width were used. The fracture toughness of the GFRP specimens increased linearly with lowering test temperature from 300 K to 77 K. The effect of the slit width on fracture toughness was found to be the tendency of fracture toughness converging to a constant value below 0.2 mm slit width. The plane stress state was attained when the ratio (B/W) of thickness (B) to width (W) of the specimens was below 0.2, accompanied with the increase of fracture toughness. Also the whitening tendency of the tear crack portion of the GFRP specimens in the tear test became clearer as the test temperature decreased.
社団法人日本材料学会の論文
1989-06-15