具有分层损伤复合材料加筋与无加筋层合板热-机械力屈曲性态

基于复合材料一维剪切理论——Mindlin 理论, 给出了材料性质与温度有关的含分层损伤复合材料加筋和无加筋层合板的线性和非线性热-机械力耦合情况下的屈曲问题有限元分析方法, 并研究了含分层损伤的加筋和无加筋层合板的两种不同类型的热- 机械力屈曲问题。通过典型算例分析, 讨论了热-机械力耦合效应和分层大小对含分层损伤结构的屈曲性态的影响关系。

THERMAL-MECHANICAL BUCKLING BEHAVIOR OF STIFFENED AND NON-STIFFENED COMPOSITE LAMINATED PLATES WITH DELAMINATION DAMAGE

On the basis of Mindlin first order shear effect plate theory, a linear and nonlinear finite element stability analysis method of the stiffened and non stiffened laminate plates with delamination damage under thermal and mechanical combined loading is established. The temperature dependent thermal and mechanical properties of the composites are considered. Two kinds of different thermal mechanical coupling problems have been studied. The numerical results of some typical examples are given. From numerical analysis for some typical examples, the coupling effects of the thermal mechanical loads, different delamination sizes and areas on buckling behavior of the stiffened and non stiffened plates are discussed. The numerical method and conclusions provided in the paper are useful for engineers of composite structures.