建立了分析含椭圆分层的缝纫增强复合材料层板压缩屈曲问题的三维模型 .通过应用瑞利 里兹法研究了分层椭圆几何参数和缝线等效弹性系数对压缩屈曲载荷的影响 .分析结果表明 ,缝纫对提高临界曲屈载荷的作用十分明显 ,随着缝线等效弹性系数的增大 ,临界曲屈载荷迅速提高 ;分层椭圆的长轴垂直于载荷方向时 ,临界曲屈载荷最小 ,并且随长轴的长度增大时 ,临界曲屈载荷减小并逐渐收敛 A three-dimensional model was developed to analyze the buckling problem of the composite sheets with elliptical delamination.Analyzed by the use of Rayleigh Ritz method, the geometrical parameters of the layered ellipse and the equivalent elastic coefficient of the suture on the buckling load were analyzed. The results show that the sewing has an obvious effect on increasing the critical buckling load. The critical buckling load increases rapidly with the increase of the equivalent elastic coefficient of the suture. When the long axis of the layered ellipse is perpendicular to the loading direction, the critical buckling load Minimum, and as the length of the long axis increases, the critical buckling load decreases and gradually converges