Dynamic experiment and numerical simulation of frozen soil under confining pressure

作     者：W.R.Tang Z.W.Zhu T.T.Fu Z.W.Zhou Z.H.Shanggua W. R. Tang;Z. W. Zhu;T. T. Fu;Z. W. Zhou;Z. H. Shangguan

作者机构：Applied Mechanics and Structural Safety Key Laboratory of Sichuan ProvinceSchool of Mechanics and EngineeringSouthwest Jiaotong UniversityChengdu610036China Northwest Institute of Eco-Environment and ResourcesState Key Laboratory of Frozen Soil EngineeringChinese Academy of SciencesLanzhou730000China 

出 版 物：《Acta Mechanica Sinica》 (力学学报（英文版）)

年 卷 期：2020年第36卷第6期

页      面：1302-1318,I0004页

核心收录：

学科分类：08[工学] 080104[工学-工程力学] 0815[工学-水利工程] 0801[工学-力学（可授工学、理学学位）] 

基　　金：This work was supported by the National Natural Science Foundation of China(Grants 11672253 and 11972028) the Opening Foundation of the State Key Laboratory of Frozen Soil Engineering(Grant SKLFSE201918) and the Opening Foundation of the State Key Laboratory for Strength and Vibration of Mechanical Structures(Grant SV2019-KF-19) 

主　　题：Frozen soil-Dynamic experiment Confining pressure Split-Hopkinson pressure bar Numerical simulation 

摘      要：With the development of cold region engineering,it is crucial to study the mechanical properties of frozen *** practice,frozen soil is inevitably subject to impact loading,making the study of frozen soil under impact loading necessary for engineering in cold *** split–Hopkinson pressure bar(SHPB)is an important experimental means for obtaining the dynamic performance of *** this study,an SHPB experiment was conducted on frozen soil under confining *** frozen soil exhibited an evident strain rate effect and temperature effect under confining *** SHPB experiment on frozen soil under confining pressure was simulated numerically using LS-DYNA software and the Holmquist–Johnson–Cook(HJC)material model.A loading simulation with passive confining pressure and active confining pressure was completed by adding an aluminum sleeve and applying a constant *** simulation results obtained using the above methods were in good agreement with the experimental *** strength of the frozen soil under confining pressure was greater than that of the uniaxial impact,and there was an evident confining pressure ***,the confining pressure provided by passive confinement was larger than that provided by active *** passive confining pressure energy absorption efficiency was higher than for the active confining pressure due to the need to absorb more energy under the same damage *** frozen soil exhibited viscoplastic failure characteristics under confining pressure.