摘要
本文采用文[1]提出的曲壳单元,根据Prandtl-Reuss塑性流动理论和Mises等向强化屈服准则,建立了壳体的弹塑性有限元格式,同时按照罚单元原理建立了组合壳体的连接条件,编制了相应的计算程序,具体计算了带接管球壳和等径三通等算例,取得了较好的结果。
In this paper curved shell elements, which present in [1], are used. Based on the Prandti-Reuss plastic flow law and Mises yield criterion with isotropic hardening rule, the finite element formulations of elasto-plastic combined shells are established. According to the principle of penalty function, some pe nalty elements are also developed to connect the different members of the com bined shells. Then the computer programmes are worked out in FORTRAN-77. Finally, several examples, such as reinforced or nonreinforced spherical press ure vessel with flush nozzle and equal diameter tree pipe subjected to inner pressure, are calculated. The results of calculation are satisfactory.
出处
《应用力学学报》
CAS
CSCD
北大核心
1990年第4期25-38,154,共14页
Chinese Journal of Applied Mechanics
基金
国家自然科学基金
关键词
组合壳
弹塑性
有限元
曲壳单元
combined shell, curved shell element, penalty element, finite elements in elasto-plasticity
