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本文应用动态松弛法(DRM)研究了承受均匀轴向压力的硼/环氧复合材料正交叠层(90°/0°)圆柱曲板在加载过程中的大挠度挠曲特性和初始几何缺陷对临界载荷的影响。文中考虑了两种弯曲边界条件;一种是四边简支;另一种是承载边为夹支而非承载边为简支。面內边界条件则假定板的周边在几何上不受约束。数值结果表明,初始几何缺陷使临界载荷显著下降,且下降的幅度与缺陷的严重程度及边界条件有关。
In this paper, the dynamic deflection method (DRM) was used to study the large deflection deflection and initial geometric defects of a cylindrical curved plate of boron / epoxy composite under uniform axial pressure during loading Impact on Critical Load. In this paper, two kinds of bending boundary conditions are considered; one is simply supported by four sides; the other is supported by the edge of the clip rather than the bearing edge is simply supported. The in-plane boundary conditions assume that the perimeter of the plate is not geometrically constrained. The numerical results show that the initial geometric defects significantly reduce the critical load, and the magnitude of the decrease is related to the severity of the defects and the boundary conditions.