K-0932 The Effect of Loading Direction and/or Stacking Sequence on The Strength in a Quasi-isotropic CFRP Laminates

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  • K-0932 CFRP擬似等方積層板の強度に及ぼす荷重方向と積層構成の影響(J05-5 強度・破壊機構解析(2))(J05 複合材料の加工と評価)

Abstract

For quasi-isotropic CFRP laminates, the elastic stress-strain behavior is expected to be the same in any direction and/or stacking sequence of laminate. But fracture and/or strength of them may strongly depend on the loading direction and/or stacking sequence of laminate. In this study, tensile tests are carried out for the specimens, cut out in several directions from two kinds of quasi-isotropic CFRP laminates, to investigate the influence of loading direction and/or stacking sequence on tensile strength. A FEM code is used to analyze the stresses in the specimens. And using the Tsai-Wu failure criterion, the first damaged strength and the tensile strength of the laminate are predicted in the various loading directions.

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