高分子系複合材料 反対称直交積層板の成形後の形状解析

Abstract

The cured shape of anti-symmetric crossply composite laminates is theoretically calculated. The displacement functions are assumed to be polynomials of coordinates and the Green strain tensor is adopted so as to take into account the nonlinearity of deformation due to large curling of cured laminates which occurs because of discrepancy of thermal expansion coefficients in fiber and transverse directions in a lamina. Rayleigh-Litz method is adopted to obtain the cured shape of antisymmetric crossply laminates. The simultaneous equations for the curvature of curling can be analytically solved. The bifurcation points of solution are also theoretically obtained. An assessment of displacement assumptions is presented.