含分层损伤复合材料组合层合梁的屈曲性态

BUCKLING BEHAVIOR OF COMPOSED LAMINATED BEAMS WITH A DELAMINATION DAMAGE

本文基于Ｍｉｎｄｌｉｎ假定推导了考虑剪切的组合层合梁的有限元列式，并在此基础上计算出含分层损伤的各种层合梁在受轴向压力情况下的屈曲模式。从中得出梁的屈曲性态与铺设角，梁的几何形状，分层位置及分层大小等因素的关系，所得结论具有普遍意义。

ln this paper a new composed laminated beam element is deduced on basis of Mindlin first order shear effect theory. A study of buckling behavior for the composed laminated beams with a delamination damage under compressive load is presented. From numerical results of some typical examples, it is clear that the effect of the location and length of the delamination, and ply-angle, orientation and geometrical configuration of the transverse section for the composed laminated beams on buckling characteristics and mode is significant. The method and numerical conclusions provided in the paper are valuable for engineers dealing with design of composite structure.