Differential quadrature method (DQM) was used to compute the critical buckling load (CBL) of composite laminates containing complex delamination shapes. The composite laminate was initially flat; however, it buckled under a compressive load due to weak adhesive between the outer ply and the whole composite laminate. Previous data obtained for composite laminates containing circular or elliptical delaminations by finite element and the Rayleigh-Ritz methods as well as DQM available in the literature were used to validate the accuracy of the approach. A good agreement between the results was observed. To show the ability of this approach for calculating the CBL of a composite laminate containing complex delamination shape, a crescent-shaped delamination was considered. The CBLs for various stacking sequences of such a composite laminate were then calculated and discussed. The commercial finite element package, ABAQUS was used to validate the DQM results for crescent delamination.

微分求积法（DQM）用于计算包含复杂分层形状的复合材料层压板的临界屈曲载荷（CBL）。复合材料层压板最初是平的。然而，由于外层和整个复合层压板之间的粘合力弱，它在压缩载荷下弯曲。先前通过有限元法和瑞利-里兹方法以及DQM获得的包含圆形或椭圆形分层的复合材料层压板的数据，可用于验证该方法的准确性。观察结果之间有很好的一致性。为了显示这种方法计算包含复杂分层形状的复合层压板的CBL的能力，考虑了月牙形分层。然后计算并讨论了这种复合层压板各种堆叠顺序的CBL。商业有限元程序包ABAQUS被用于验证DQM结果用于月牙形分层。