A Dynamic Micromechanical Constitutive Model for Frozen Soil under Impact Loading  

作　　者：Qijun Xie Zhiwu Zhu Guozheng Kang 

机构地区：[1]School of Mechanics and Engeering,Southwest Jiaotong University [2]State Key Laboratory of Frozen Soil Engineering,Cold and Arid Regions Environmental and Engineering Research Institute,Chinese Academic Sciences [3]State Key Laboratory of Explosion Science and Technology,Beijing Institute of Technology

出　　处：《Acta Mechanica Solida Sinica》2016年第1期13-21,共9页固体力学学报（英文版）

基　　金：Project supported by the National Natural Science Foundation of China(No.11172251);the Open Fund of State Key Laboratory of Frozen Soil Engineering(No.SKLFSE201001);the Opening Project of State Key Laboratory of Explosion Science and Technology(Beijing Institute of Technology,No.KFJJ13-10M);the Project of Sichuan Provincial Youth Science and Technology Innovation Team,China(No.2013TD0004)

摘　　要：By taking the frozen soil as a particle-reinforced composite material which consists of clay soil （i.e., the matrix） and ice particles, a micromechanical constitutive model is established to describe the dynamic compressive deformation of frozen soil. The proposed model is constructed by referring to the debonding damage theory of composite materials, and addresses the effects of strain rate and temperature on the dynamic compressive deformation of frozen soil. The proposed model is verified through comparison of the predictions with the corresponding dynamic experimental data of frozen soil obtained from the split Hopkinson pressure bar （SHPB） tests at different high strain rates and temperatures. It is shown that the predictions agree well with the experimental results.By taking the frozen soil as a particle-reinforced composite material which consists of clay soil （i.e., the matrix） and ice particles, a micromechanical constitutive model is established to describe the dynamic compressive deformation of frozen soil. The proposed model is constructed by referring to the debonding damage theory of composite materials, and addresses the effects of strain rate and temperature on the dynamic compressive deformation of frozen soil. The proposed model is verified through comparison of the predictions with the corresponding dynamic experimental data of frozen soil obtained from the split Hopkinson pressure bar （SHPB） tests at different high strain rates and temperatures. It is shown that the predictions agree well with the experimental results.

关 键 词：frozen soil DYNAMIC micromechanical model debonding damage theory SHPB 

分 类 号：P642.14[天文地球—工程地质学]