層内不均質性を考慮した平織複合材料積層板の曲げ剛性および面外せん断剛性の解析

抄録

In this study, bending and transverse shear properties of plain weave fabric composite laminates are investigated considering the intra-lamina inhomogeneity through finite element analysis. Using the homogenization procedures, efective Reissner–Mindlin plate bending and transverse shear properties of the composite laminate are calculated. Assuming the number of laminations is infinite, effective 3D continuum properties of the composite (elastic properties as a bulk material) are also calculated. Then, the effect of the number of laminations on the laminate bending stiffness and the transverse shear stiffness, in other words, the effect of the intra-lamina inhomogeneity on the laminate stiffness, is investigated. Through the numerical investigation, it is found that if the number of plies of the laminate is very small, bending stiffness and transverse shear stiffness of the laminate are significantly reduced compared to those evaluated using effective 3D continuum properties.