赵杰,陈万吉,冀宾.轴对称弹性应变梯度理论公式推导及有限元实现[J].计算力学学报,2009,26(2):209~214 |
| 码上扫一扫! |
轴对称弹性应变梯度理论公式推导及有限元实现 |
Formula derivation in axisymmetric strain gradient theory and finite element implementation |
投稿时间:2007-04-10 |
DOI:10.7511/jslx20092011 |
中文关键词: 应变梯度理论 C1弱连续 轴对称单元 C0-1分片检验 |
英文关键词:strain gradient theory C1 weak continuity axisymmetric element C0-1 patch test |
基金项目:国家自然科学基金(50479058,10672032)资助项目. |
|
摘要点击次数: 1395 |
全文下载次数: 1070 |
中文摘要: |
用张量运算推导了弹性应变梯度轴对称问题的基本公式。建立了应变梯度轴对称不协调元的弱连续条件,进一步建立了满足弱连续条件的应变梯度轴对称18-DOF三角形单元(BCIZ+ART9),其中BCIZ满足线性应变C0连续,用于计算应变ε;ART9满足常曲率C1弱连续,用于计算应变梯度η。数值结果表明该单元通过C0-1分片检验并能体现材料的尺度效应。 |
英文摘要: |
This paper deals with the basic functions of axisymmetric strain gradient theory. A weak continuity condition, which assured the axisymmetric strain gradient element convergent is proposed. And an 18-DOF axisymmetric refined nonconforming triangular element(BCIZ+ART9)is derived. The displacement function of the thin plate triangular element BCIZ, which can pass the C0linear stress patch test, is used to calculate strain ε. And the element function of the refined element ART9, which is derived from BCIZ and satisfies the interelement C1 weak continuity conditions, is used to calculate the strain gradientη. Numerical results show that the element can reflect the scale effects of strain gradient and pass C0-1 patch test. |
查看全文 查看/发表评论 下载PDF阅读器 |
|
|
|
|