The dynamic thermomechanical analysis on composite sandwich plates with damage is investigated in this paper. A thermomechanical extended layerwise/soild-element (TELW/SE) method is developed for sandwich plates. In the TELW/SE method, the thermomechanical extended layerwise theory is used to model the behavior of the laminated composite facesheets, while the thermomechanical eight-node solid element is employed to discretize the cores. The total governing equations are assembled by using the interface conditions, to ensure the compatibility of displacements and temperature, and the equilibrium of internal force. In the numerical examples, the dynamic thermomechanical analysis is carried out for the sandwich plates with one or two layer honeycombs cores, taking the delaminations, transverse crack and debonding at core/facesheets interface into account. The proposed method is validated by using three-dimensional elastic models developed in commercial finite element softwares Comsol and Abaqus, and good agreement is achieved. Several typical damage in composite sandwich plates can be described finely in the proposed method.

本文研究了具有损伤的复合材料夹层板的动态热力学分析。为夹层板开发了一种热机械扩展的分层/固结（TELW / SE）方法。在TELW / SE方法中，使用热机械扩展分层理论对层压复合面板的行为进行建模，而使用热机械八节点实体元素离散化纤芯。通过使用界面条件来组装总控制方程，以确保位移和温度的兼容性以及内力的平衡。在数值示例中，对具有一层或两层蜂窝芯的夹层板进行了动态热力学分析，并进行了分层，考虑到芯/面板界面处的横向裂纹和剥离。通过在商业有限元软件Comsol和Abaqus中开发的三维弹性模型对所提出的方法进行了验证，并取得了良好的一致性。所提出的方法可以很好地描述复合夹层板中的几种典型损坏。