| 基于内时理论的冻土试验研究与数值分析 |
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| 引用本文： | 朱志武,宁建国,宋顺成.基于内时理论的冻土试验研究与数值分析[J].力学学报,2009,41(4):549-554. |
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| 作者姓名： | 朱志武 宁建国 宋顺成 |
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| 作者单位： | 成都市西南交通大学力学与工程学院北京理工大学爆炸科学与技术国家重点实验室成都市西南交通大学力学与工程学院 |
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| 基金项目： | 国家自然科学基金项目(10625208);;牵引动力国家重点实验室重点开放基金项目(2008TPL_Z03)资助~~ |
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| 摘 要： | 从内时理论出发，基于考虑了温度和应变率影响的冻土内时流变本构方程，采用Matlab拟合法确定内时材料参数，对冻土在单轴和3轴应力条件下的应变进行了求解、分析与试验验证，并将理论结果与试验所得的应力-应变曲线进行了比较，理论曲线与试验曲线基本吻合. 与传统塑性理论的研究方法相比，内时理论的研究方法可以免去确定屈服面的困难. 基于所使用的内时本构模型，对冻土路基的冻结进行了数值分析，结果表明该理论具有很好的适用性.
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| 关 键 词： | 冻土 试验研究 流变 非弹性 数值分析 |
| 收稿时间： | 2008-01-10 |
| 修稿时间： | 2008-03-12 |
EXPERIMENTAL RESEARCH AND NUMERICAL ANALYSIS OF FROZEN SOIL BASED ON ENDOCHRONIC THEORY |
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| Zhu Zhiwu
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Ning Jianguo
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Song Shuncheng.EXPERIMENTAL RESEARCH AND NUMERICAL ANALYSIS OF FROZEN SOIL BASED ON ENDOCHRONIC THEORY[J].chinese journal of theoretical and applied mechanics,2009,41(4):549-554. |
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| Authors: | Zhu Zhiwu Ning Jianguo Song Shuncheng |
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| Institution: | State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, 100081 Beijing, China Department of Applied Mechanics and Engineering, Southwest Jiaotong University, Chengdou 610031,China |
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| Abstract: | Based on the endochronic theory,the basic principle of the irreversible thermodynamics of continuum media was used to derive a new endochronic rheological constitutive equation of frozen soil by redefining the intrinsic times.The corresponding parameters in the endochronic equations can be determined by the method of the Matlab fitting.The solution,analysis and experimental validation of the new equations under uniaxial and triaxial stress were performed.The stress-strain curves of theoretical calculation a... |
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| Keywords: | frozen soil experimental research rheology inelasticity numerical analysis |
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