引張りを受ける一方向カーボン/エポキシ積層板の切欠破壊予測モデル

概要

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The notched strength of unidirectional carbon/epoxy laminate, Toray T800H/#3631, was evaluated under tensile loading using center-notched specimens having various fiber orientations relative to the loading axis. On the basis of acoustic emission (AE) monitoring and fractography, failure mechanisms can be classified into two modes: tensile failure and shear failure. For the case of tensile failure, no AE signal was detected before the split initiation; the fracture surface was covered with epoxy resin. On the other hand, for the case of shear failure, a gradual increase in total AE energy was observed before the split initiation; the fracture surface was characterized by many hackles and fiber/matrix interfacial debonding. The measured strength for the split initiation from notches showed good agreement with the predictions from the modified average stress model combined with the maximum stress criterion proposed by the authors. No interaction was observed between tensile failure and shear failure for split initiation.
一般社団法人日本機械学会の論文
1991-04-25