复杂载荷下复合材料对称层合板的椭圆形分层屈曲

应用Ｒａｙｌｅｉｇｈ－Ｒｉｔｚ法对含有单个椭圆形分层的复合材料对称层板在压剪载荷联合作用下的脱层屈曲问题进行了分析计算。给出相应于不同的椭圆长短半轴之比ａ／ｂ值下及不同椭回主轴的偏角时，脱层屈曲的临界应变值。此计算考虑了层板的拉伸剪切藕合刚度影响及子层本身弯曲－扭转耦合刚度，和拉伸－弯曲耦合刚度的影响，给出有工程参考价值的计算结果。

Buckling of elliptical delamination for symmetrical composite laminate subjected complex load

A Rayleigh-Ritz method is presented to determine the load or strain at which delamina-tion buckling will occur for a symmetrical composite laminate containing a single delamina-tion. This delamination is assumed to be elliptical in shape,with local axes of symmetrywhich may be at an angle a relative to the globle axes of the laminate. The laminate is suh-jected to complex loading,which include uniaxial and biaxial compression and shear. The crit-ical strain values of delamination buckling have been investigated for the delamination regionwith different a and ratio a/b of the major axis and the minor axis. The effects of possiblecoupling behavior of the delamination region have been considered.