中央切欠をもつＧＦＲＰの引張りにおける破壊

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  • Fracture criterion in tension tests of center notched plates of GFRP.
  • チュウオウ キリカキ オ モツ GFRP ノ ヒッパリ ニ オケル ハカイ ガ

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The tensile fracture behavior of the center notched plates has been studied for composite materials. Tension tests of the center notched plates for glass fiber reinforced polycarbonate have been carried out for a wide range of notch radii and two kinds of width. The fracture process at the notch tip was carefully observed during the tensile testing. Experimental results were discussed in terms of the linear notch mechanics, which considers the combination of the elastic maximum stress at the notch tip and the notch tip radius. The results obtained can be summarized as follows; (1) In the case of notched GFRP, the failure occurred in a brittle manner which was controlled by the constant elastic maximum stress which was governed by the notch tip radius only. (2) The strength characteristics and the fracture were clearly estimated using the parameter, σmaxc/E, regardless of the content of glass fiber. (3) For polycarbonate, the failure was in a ductile manner, which was controlled by the nominal stress in the net section of each type of specimen.

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