复合材料层板的瞬态动响应分析

 本文用混合杂交单元分析复合材料层板的瞬态动力响应。针对纤维增强复合材料层板的特点,综合考虑精确性和经济性,对于较薄的板采用Mindlin直线假设的位移模式;对于较厚的层板提出分段折线假设的位移模式,并讨论了其适用范围。对动响应分析采用振型叠加法和Wilson-θ积分法确定层板对突加载荷的动挠度和动应力。最后,通过各种数值算例考查本文方法的有效性。

TRANSIENT RESPONSE OF LAYERED COMPOSITE PLATES

In this paper a mixed hybrid-stress element is applied to analyzing transient response of layered composite plates. In accordance with the characteristics of layered fiber-reinforced composite plates and for the sake of synthetic consideration of their accuracy and economy, a Mindlin straight line assumption is used to get the displacement patterns for the thin plates and a broken line assumption used for thick plates. Their suitability is also discussed. A mode summation method and Wilson-integration are used for dynamic response analysis to determine the dynamic deflections and stress states of composite laminates under sudden loading. Finally, several numerical examples and experiments verify that the method is very effective.