中文摘要：

基于增强型Reddy理论,给出了四节点四边形板单元并分析复合材料层合板的热应力问题.与经典Reddy理论对比,增强型Reddy理论考虑了横法向应变,但其位移变量数与Reddy理论相同.四节点四边形单元满足单元间C1连续条件.数值结果表明,基于增强型Reddy理论的四边形单元能准确的分析复合材料层合板的热膨胀问题,而Reddy理论分析热膨胀问题误差比较大.

英文摘要：

Based on the enhanced Reddy＇s theory, the four-node quadrilateral plate element is proposed for the analysis of laminated composite plates subjected to thermal loads. Although transverse normal deforma- tion is introduced in the proposed theory, the number of displacement variables is the same as that in the classical Reddy＇s theory. The four-node quadrilateral plate element satisfies the requirement of C1 continuity conditions at adjacent elements. Numerical results show that the four-node quadrilateral plate element based on the enhanced Reddy＇s theory can accurately analyze the thermal expansion problems of laminated com- posite plates, while the classical Reddy＇s theory is less accurate.