| 基于细观力学方法的冻土本构模型研究 |
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| 引用本文： | 宁建国,王慧,朱志武,孙远翔.基于细观力学方法的冻土本构模型研究[J].北京理工大学学报,2005,25(10):847-851. |
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| 作者姓名： | 宁建国 王慧 朱志武 孙远翔 |
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| 作者单位： | 北京理工大学,爆炸科学与技术国家重点实验室,北京,100081;北京理工大学,爆炸科学与技术国家重点实验室,北京,100081;北京理工大学,爆炸科学与技术国家重点实验室,北京,100081;北京理工大学,爆炸科学与技术国家重点实验室,北京,100081 |
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| 基金项目： | 中国科学院知识创新工程项目 |
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| 摘 要： | 从复合材料的细观力学机理出发研究冻土的材料特性,用混合律方法得到了冻土材料的等效弹性常数,并利用这些弹性常数建立了含损伤的冻土弹性本构模型.对于在不同冰体积含量和不同温度下的冻结砂土,由该损伤本构模型计算的结果与实测的应力-应变曲线比较吻合,表明该模型能够较好地描述实际冻土材料的力学特性.
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| 关 键 词： | 冻土 混合律 损伤 本构模型 |
| 文章编号： | 1001-0645(2005)10-0847-05 |
| 收稿时间： | 11 2 2004 12:00AM |
| 修稿时间： | 2004年11月2日 |
Investigation of the Constitutive Modle of Frozen Soil Based on Meso-Mechanics |
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| NING Jian-guo,WANG Hui,ZHU Zhi-wu and SUN Yuan-xiang.Investigation of the Constitutive Modle of Frozen Soil Based on Meso-Mechanics[J].Journal of Beijing Institute of Technology(Natural Science Edition),2005,25(10):847-851. |
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| Authors: | NING Jian-guo WANG Hui ZHU Zhi-wu and SUN Yuan-xiang |
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| Institution: | State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, China |
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| Abstract: | Material characteristics of frozen soil is studied from the viewpoint of meso-mechanics mechanism of composite materials,where the equivalent elastic constants of the frozen soil are obtained by use of the law of mixtures,and the elastic constitutive model of the frozen soil set up using these constants.Based on this constitutive model,stress-strain curves of the frozen sand-soil with different volumetric percentage of ice at different temperatures are calculated.The results look highly consistent with the experimental data,which indicates that this model can well describe the mechanical characters of frozen soil. |
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| Keywords: | frozen soil law of mixtures damage constitutive model |
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