コースティックス法による異相高分子材料の衝撃破壊挙動に関する実験的検証

概要

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In this paper, dynamic stress intensity factors of bonded dissimilar materials were determined by using caustics methods. Bonding between epoxy resin and polycarbonate composed specimens by epoxy bond. Upper materials of specimens were epoxy resin and polycarbonate. Lower materials were polycarbonate with V notches for all. V notch length was 3mm. As the result of this experiment, dynamic stress intensity factor of bonded materials was larger than non-interface specimen. It is clear that crack tips influenced these interfaces and mechanical properties of upper meterials. In dynamic behavior, each specimens showed a similar tendency up to 300, 600 and 900 μs. Dynamic stress intensity factor increase became less at 300, 600 and 900 μs, and afterwards became moer. Cracks were propagated at t=950 μs for interface next reached interface and became interface crack. Dynamic fracture toughness of bonded materials was larger than non-interface specimen, but time of crack propagated were faster than this.
一般社団法人日本機械学会の論文
2000-04-25