| 一种带有沙漏控制的新型EAS实体壳单元 |
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| 引用本文： | 李丽明,李大永,彭颖红.一种带有沙漏控制的新型EAS实体壳单元[J].应用力学学报,2011,28(2). |
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| 作者姓名： | 李丽明 李大永 彭颖红 |
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| 作者单位： | 上海交通大学机械与动力工程学院,200240,上海 |
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| 基金项目： | 国家自然科学基金，上海市科委资助项 |
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| 摘 要： | 基于 Hu-Washizu 变分原理推导了一种带有沙漏控制的实体壳单元的显式有限元列式;采用面内单点积分方案,提高了计算效率;同时引入沙漏控制力,抑制了沙漏现象.基于缩减积分方案,采用 B-bar 法消除体积自锁,并通过添加七个改善拟应变参数解决了泊松自锁和剪切自锁.采用改善拟应变法消除剪切自锁,使得表达式简洁.利用这种显式实体壳单元模型对3个非线性变形的标准算例进行了计算,并与相关参考文献和有限元软件 ABAQUS 的计算结果进行了比较.结果表明:该实体壳单元具有较高的计算精度,可有效地解决板壳非线性大变形分析问题,具有很好的工程应用前景.
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| 关 键 词： | 实体壳单元 缩减积分 沙漏控制 改善拟应变法 显式有限元法 |
A new stabilized enhanced assumed strain (EAS) solid-shell element |
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| Li Liming,LI Dayong,Peng Yingheng.A new stabilized enhanced assumed strain (EAS) solid-shell element[J].Chinese Journal of Applied Mechanics,2011,28(2). |
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| Authors: | Li Liming LI Dayong Peng Yingheng |
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| Institution: | Li Liming Peng Yinghong Li Dayong(School of Mechanical Engineering,Shanghai Jiaotong University,Shanghai,200240,China) |
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| Abstract: | In this paper,a stabilized solid-shell element is developed in the framework of explicit finite element based on the Hu-Washizu variational principle.A reduced in-plane integration scheme is adopted to improve computational efficiency and a physical stabilization procedure is employed in order to avoid hourglass phenomenon.Furthermore,the B-bar approach is employed to avoid volumetric locking and a seven-parameter enhanced assumed strain method is used to eliminate the Poisson and transverse shear locking p... |
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| Keywords: | solid-shell element reduced integration stabilization enhanced assumed strain method explicit finite element method |
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