FRP直交積層板におけるマトリックスき裂損傷の発達 : 第1報, き裂発生によるエネルギー解放率の理論解析

概要

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The energy-release rate (ERR) due to transverse matrix cracking in a 90°layer of FRP crossply laminate is theoretically calculated. The ERR of the whole laminate is derived for two cases of displacement-controlled and dead-load conditions. The exact expression of ERR is derived by a precise examination of load-displacement characteristics taking account of residual displacements due to relaxation of thermal residual stresses. For displacement-controlled tensile testing, the energy released by cracking is equivalent to the change in the strain energy of the laminate ; therefore, the ERR of the whole laminate is divided into two parts, i.e., those of the 90°layer and the 0°layer. The ERR of each layer is theoretically calculated for use in parts II and III in order to formulate the evolution law of cracking damage.
社団法人日本機械学会の論文
1997-11-25