| 有初始缺陷的结构非线性分析(英文) |
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| 引用本文： | 李丽娟,刘锋.有初始缺陷的结构非线性分析(英文)[J].应用基础与工程科学学报,1995(1). |
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| 作者姓名： | 李丽娟 刘锋 |
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| 作者单位： | 青岛化工学院机械系，青岛化工学院机械系 青岛 266042，青岛 266042 |
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| 基金项目： | The project supported by the Natural Science Foundation of Shangdong Province |
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| 摘 要： | 本文在等温小变形弹塑性内时本构方程偏量形式的基础上,把初始缺陷视为初始位移,推导出了带有初始几何缺陷的非线性弹塑性问题的有限元方程。可用于分析缺陷对结构非线性弹塑性反应的影响,也可用于带缺陷的非线性问题求解及稳定性分析。文中给出的算例表明本方法是可行有效的。
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| 关 键 词： | 初始缺陷 大变形 内蕴时间 弹塑性 |
Elastoplastic Large Deformation Analysis of Structures with Initial Geometric Imperfections |
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| LI Lijuan LIU Feng.Elastoplastic Large Deformation Analysis of Structures with Initial Geometric Imperfections[J].Journal of Basic Science and Engineering,1995(1). |
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| Authors: | LI Lijuan LIU Feng |
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| Institution: | Mechanical Engieering Department. Qingdao Institute of Chemical Technology. Qingdao 266042 |
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| Abstract: | On the basis of elastoplastic constitutive equations of endochronic theory on the assumption of isotemperature and small deformations, this paper has deduced constitutive equation suitable for the case of large displacement, large rotation but small strain. Taking the initial imperfections as initial displacements and using endochronic theory, we have presented the finite element equations of elastoplastic large deformation problems with initial imperfections. The equations can be used to analyze the effects of imperfections on the elastoplastic response of structures and they are also useful for the solution of nonlinear problems and buckling analysis. A numerical example shows the methos proposed by this paper correct and effective. |
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| Keywords: | initial imperfections endochronic plasticity structures |
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