| 基于应变局部化理论的剑桥模型改进 |
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| 引用本文： | 张兆,刘元雪.基于应变局部化理论的剑桥模型改进[J].后勤工程学院学报,2005,21(2):50-51,66. |
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| 作者姓名： | 张兆 刘元雪 |
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| 作者单位： | 后勤工程学院,军事土木工程系,重庆,400016 |
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| 摘 要： | 应用传统的弹塑性理论模型在分析剪切带的时候遇到了很多困难,如控制方程失去椭圆性等,其原因是传统的弹塑性理论模型并没有包含材料的内部参数。在剑桥模型的基础上,考虑应变二阶梯度,提出一种新的计算剪切带的理论模型。当应变局部化发生时,带内土体采用该模型计算,带外土体则按照传统弹塑性模型计算。该理论模型汲取了剑桥模型实验参数少,应用简便的优点。
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| 关 键 词： | 局部化 剪切带 剑桥模型 梯度塑性理论 |
| 文章编号： | 1672-7843(2005)02-0050-02 |
| 修稿时间： | 2004年11月26 |
A Modified Cam-Clay Model Based on the Strain Localization Theory |
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| ZHANG Zhao,LIU Yuan-xue.A Modified Cam-Clay Model Based on the Strain Localization Theory[J].Journal of Logistical Engineering University,2005,21(2):50-51,66. |
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| Authors: | ZHANG Zhao LIU Yuan-xue |
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| Abstract: | Solutions within the framework of the classical elastoplasticity can only yield an estimate for the stress level at which localization may initiate but the thickness of shear bands remains indeterminate, such as the loss of ellipticity of the governing equation. In order to avoid the spurious discretization sensitivity of the finite element solutions, a gradient of the modified Cam-Clay model is proposed. The new model has only a few parameter and easy to be used. |
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| Keywords: | localization shear band Cam-Cky model gradient plasticity theory |
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