| 等主应力比路径下砂土弹塑性本构关系的数值建模 |
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| 引用本文： | 任青阳,王靖涛. 等主应力比路径下砂土弹塑性本构关系的数值建模[J]. 华中科技大学学报(城市科学版), 2005, 22(3): 69-71 |
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| 作者姓名： | 任青阳 王靖涛 |
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| 作者单位： | 华中科技大学,土木工程与力学学院,湖北,武汉,430074 |
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| 摘 要： | 按照数值建模理论,建立了砂土在等主应力比路径下的弹塑性本构模型,给出了塑性体应变和塑性剪应变两组屈服轨迹,模型的建立为工程提供了一个符合土体中实际发生的应力路径的本构方程.同时,通过与常规三轴压缩路径和等p路径(TC)下的应力应变关系曲面和屈服轨迹的对比,发现三者之间存在着显著差别,证实了应力路径对本构关系的影响是不可忽略的.
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| 关 键 词： | 数值建模 等主应力比路径 应力路径 本构关系 |
| 文章编号： | 1672-7037（2005）03-0069-03 |
| 收稿时间： | 2005-01-26 |
| 修稿时间： | 2005-01-26 |
Numerical Method in Modeling the Elastoplastic Constitutive Relationship of Sand Under the Path of Constant Proportion of Principle Stress |
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| REN Qing-yang,WANG Jing-tao. Numerical Method in Modeling the Elastoplastic Constitutive Relationship of Sand Under the Path of Constant Proportion of Principle Stress[J]. Journal of Huazhong University of Science and Technology, 2005, 22(3): 69-71 |
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| Authors: | REN Qing-yang WANG Jing-tao |
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| Abstract: | Based on the numerical method modeling the constitutive law of rock and soil and the elastoplastic constitutive relationship of sand under the path of constant proportion of principle stress are established. The yield lines of plastic volum etric strain and plastic generalized shear stain are given. The constitutive mo del provides an exact constitutive equation for this k ind of engineering, which reflects the effect of practical stress path occurred in soils. Also, by comparing the stress-strain surfaces and yield locus of thre e stress paths, it is found that the difference among three stress paths are obvious, which demonstrates the influence of stress path on constitutive l aw can not be neglected. |
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| Keywords: | numerical method the path of constant proport ion of principle stress stress path constitutive relationship |
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