关键词: 实体壳, 改善拟应变, 共旋理论, 非线性变形, 显式有限元法

Abstract: A solidshell element was introduced into explicit finite element method (EFEM) and locking pathologies were eliminated by employing twelve enhanced assumed strain parameters，which makes up the deformation limitations of solidshell element. Stress was updated through the corotational theory and radial return algorithm. Accordingly, a solidshell element analysis model based on EFEM was developed to account for plates and shells with large deformation. Standard benchmarks were exercised. The results show the high accuracy of the solidshell element. It also proved the efficiency of the proposed model in dealing with plates and shells exhibiting both large deformation and elastoplastic behavior.