压力容器2012，Vol.29Issue(10)：16-22,7.DOI:10.3969/j.issn.1001-4837.2012.10.004
碟形封头压力容器在内压作用下的弹塑性屈曲及后屈曲行为研究
Elasto-Plastic Buckling and Post-Buckling of Internal Pressurized Torispherical Pressure Vessel
汤国伟 1张彤2
作者信息
- 1. 上海飞机设计研究院结构设计研究部,上海 201210
- 2. 北京航空航天大学固体力学研究所,北京100191
- 折叠
摘要
Abstract
Elasto - plastic buckling and post - buckling of internal pressurized torispherical shell is analyzed by ABAQUS. Asymmetric mesh technology is an effective way to break symmetry and to induce the bifurcation buckling for simulating the buckling behavior of torispherical shell under internal pressure by Riks method. The buckling load is captured from the load - deflection curve of a typical point within the buckled zone. The results show that;As the internal pressure increased above some critical value,a wave like band had appeared in the knuckle region. After formation of the wave like deformation the pressure can be further increased substantially, causing the formation of visible buckles in the knuckle region. The post - buckling behavior can be departed as two phases: the first phase and the second phase. Initial imperfections have been introduced to the model. The post - buckling behavior has been affected by the location of the imperfections, and the bifurcation load has decreased caused by the initial imperfections.关键词
碟形封头压力容器/分叉屈曲/后屈曲/非对称网格剖分/初始厚度缺陷Key words
torispherical pressure vessel/ bifurcation/ post - buckling/ asymmetric mesh technology/ initial imperfection分类
机械制造引用本文复制引用
汤国伟,张彤..碟形封头压力容器在内压作用下的弹塑性屈曲及后屈曲行为研究[J].压力容器,2012,29(10):16-22,7.
