含一个无外力圆柱面带转动的三维杂交应力元

王安平

doi:10.6052/0459-1879-13-104

含一个无外力圆柱面带转动的三维杂交应力元

王安平

中国科学院空间应用工程与技术中心, 北京100094

详细信息

作者简介:
王安平，副研究员，主要研究方向：计算力学.

中图分类号: O242.21
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- 文章访问数: 1063
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出版历程
- 收稿日期: 2013-04-01
- 修回日期: 2013-05-08
- 刊出日期: 2014-01-17

SPECIAL HYBRID STRESS SOLID ELEMENT WITH DRILLING DEGREES OF FREEDOM AND A TRACTION-FREE CIRCULAR BOUNDARY

Wang Anping

Technology and Engineering Center for Space Utilization, Chinese Academy of Sciences, Beijing 100094, China

摘要

摘要: 根据一种修正的余能原理，建立了一类具有一个无外力圆柱表面及结点含转动自由度的8 结点新型三维杂交应力元. 单元边界位移场选择二次位移插值函数，且与相邻元协调；单元内假定应力场满足以柱坐标表示的平衡方程及圆柱面上无外力边界条件. 数值算例表明，这种特殊杂交应力元在相当粗的网格下即能十分准确地分析圆弧形槽口附近及曲梁的三维（及二维）的孔边应力分布.
- 杂交应力元 /
- 转动自由度 /
- 槽孔 /
- 应力场 /
- 应力分布
Abstract: New 8-node special hybrid stress elements with drilling degrees of freedom have been developed based on the principle of minimum complementary energy. These elements are used jointly with conventional displacement elements for the analysis of stress concentrations around different holes and notches. The assumed stress fields in the elements satisfy the equilibrium equations, the traction-free boundary conditions and the compatibility equations. The examples of these special elements have been shown that these present special elements are far superior in predicting the stress concentration factors, the distributions of circumferential stresses and the normal stress when only very coarse meshes are used near holes and notches.
- hybrid stress element /
- drilling degrees of freedom /
- holes and notches /
- stress field /
- stress distribution

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参考文献(27)

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