含层间分层损伤复合材料层合板的动力响应研究(英文)

Dynamic Behavior of Laminated Composite Plates with Delamination? ?

本文研究了含层间分层损伤复合材料层合板分层模型、阻尼和动力响应特征。在分层区上下子板间构造一种特定的界面连接单元 ,以防止分层处子板间的脱离或嵌入现象。为确定合理的有限元分析中的阻尼矩阵形式 ,文中进行了多种计算方式的比较 ,并做了T300/QY8911层合板梁的激振试验 ,依据耗散能等效 ,提出对阻尼矩阵构造的改良方法 ,使系统有限元动力响应分析中 ,既包含较多模态参数对结构响应的作用 ,又避免阻尼矩阵的满阵形式以利于有限元分析的计算机实施。利用时域直接积分法对稳态激励下的响应特征进行了研究 ,通过对界面连接单元刚度对动力特性影响的计算 ,给出分层受损复合材料层合板的动力响应特征 ,为含层间分层损伤层合板动力分析提供了一个有效方法,同时 。

The dynamic behavior of laminated composite plates with a delamination is investigated for elucidating physical and mechanical phenomena.The dynamic response analysis has been performed using the FEM based on the first order shear deformation theory.A delaminated constrain model of the laminated plate and a virtual interface element are developed to avoid the overlap and penetration between the upper and lower sublaminates at delamination region.A modified generalized orthotropic damping matrix is obtained considering multi-mode parameters.Some typical examples are given.Good agreement has been found in comparing the numerical results with that of others and experiments.