| 一种基于混合物理论的非饱和岩土类材料的弹塑性损伤模型 |
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| 引用本文： | 杨松岩,俞茂宏.一种基于混合物理论的非饱和岩土类材料的弹塑性损伤模型[J].岩土工程学报,1998,20(5):61-66. |
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| 作者姓名： | 杨松岩 俞茂宏 |
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| 作者单位： | 西安交通大学建筑工程与力学学院； |
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| 摘 要： | 在混合物理论的框架内，提出了一个处理饱和与非饱和的岩土类材料变形和强度本构建模的新方法。该方法将多相工程材料看成由两个层次的三种混合物模型组成。针对非饱和岩土类材料的特点，应用该方法，给出了一个具体的弹塑性损伤本构方程，可描述材料性质的劣化过程（即损伤和软化）以及非饱和程度对材料变形强度特性的影响，并编制了专用的有限元程序。作为算例，对常规三轴试件进行了有限元分析，得出了一些具体的结果。
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| 关 键 词： | 非饱和岩土类材料 混合物理论 本构建模 弹塑性损伤本构模型 有限元实施和应用 |
A new feasible elasto-plastic damage model in the frame of the theory of mixtures |
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| Yang Songyan,Yu Maohong.A new feasible elasto-plastic damage model in the frame of the theory of mixtures[J].Chinese Journal of Geotechnical Engineering,1998,20(5):61-66. |
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| Authors: | Yang Songyan Yu Maohong |
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| Affiliation: | School of Civil Engineering and Mechanics Xi’an Jiaotong University Xi’an 710049 China |
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| Abstract: | In the frame of the Theory of Mixtures, the paper proposed and developed a new method for the constitutive modelling of saturated and unsaturated porous media. In the new model, realistic porous media is viewed as three kinds of mixtures within two levels. In order to simulate the degradation and softening properties of geomaterials, an elasto plastic damage model is also proposed, which, in addition, can also take into account of the influence of unsaturation on the overall properties of geomaterials. As an example, finite element analysis is performed to simulate the deformation and strength properties of a conventional triaxial specimen. |
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| Keywords: | unsaturated geomaterials mixture theory constitutive modelling elasto plastic damage model FE implementation and application |
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