| 基于西原模型的非线性黏弹塑性流变模型 |
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| 引用本文： | 李良权,徐亚,王伟.基于西原模型的非线性黏弹塑性流变模型[J].力学学报,2009,41(5):671. |
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| 作者姓名： | 李良权 徐亚 王伟 |
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| 作者单位： | 河海大学岩土工程研究所, 210098 河海大学岩土工程研究所, 210098 河海大学岩土工程研究所, 210098 |
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| 基金项目： | 国家自然科学基金重点项目(50539110);;河海大学自然科学基金项目(工科类)(2008428311)~~ |
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| 摘 要： | 在西原模型的基础上，引入能反映加速蠕变起始点的非线性黏塑性元件和瞬时塑性变形的塑性元件，建立了一个能完整反映蠕变全过程的非线性黏弹塑性流变模型. 在其一维流变模型结构的基础上建立三维的流变模型，推导三维流变方程，接着探讨了在三轴压缩试验中确定三维蠕变参数的方法，并对参数进行了敏感性分析. 用三轴压缩试验结果验证模型的有效性，结果表明模型能很好地模拟蠕变的三阶段，并且在多级偏应力水平下可以采用同一组蠕变参数.
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| 关 键 词： | 岩石流变力学 黏弹塑性 流变模型 瞬时塑性应变 蠕变试验 |
| 收稿时间： | 2008-01-25 |
A NONLINEAR VISCOELASTOPLASTIC RHEOLOGICAL MODEL BASED ON NISHIHARA'S MODEL |
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| Li Liangquan
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Xu Weiya
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Wang Wei.A NONLINEAR VISCOELASTOPLASTIC RHEOLOGICAL MODEL BASED ON NISHIHARA'S MODEL[J].chinese journal of theoretical and applied mechanics,2009,41(5):671. |
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| Authors: | Li Liangquan Xu Weiya Wang Wei |
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| Institution: | Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing 210098, China Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing 210098, China Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing 210098, China |
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| Abstract: | A new nonlinear viscoelastoplastic rheological model is proposed to perfectly describe the global creep behavior in this paper.The present model is based on Nishihara's model by adding two additional elements:one is the nonlinear viscoplastic element which is used to define the onset of the tertiary creep stage; the other is the plastic element describing the instantaneous plastic deformation.Firstly,a three-dimensional model is formulated on the basis of its one-dimensional form.Then,the identification of ... |
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| Keywords: | rock rheological mechanics viscoelastoplastic rheological model instantaneous plastic strain creep test |
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