典型文献
Numerical investigation of rock dynamic fragmentation during rockslides using a coupled 3D FEM-DEM method
文献摘要：
Rockslides are one of the most common geological hazards in mountainous areas and can pose significant threats to the safety of human lives and infrastructures.Studying the dynamic fragmentation process,and fragment characteristics of rock blocks during rockslides is of great significance.In this study,the influences of the slope angle on the dynamic fragmentation process,damage and energy evolution,and the fragments'flying velocity and flying angle were systematically investigated using a coupled 3D FEM-DEM method.An improved fragment search algorithm was first proposed to more effectively extract the information of the fragments after impacting.The input parameters in the numerical modeling were carefully calibrated based on the quasi-static uniaxial compression tests and the rock-impact tests.The complex fragmentation process of rock block sliding along an inclined slope was simulated.The results indicate that the fragmentation intensity gradually increases with increasing the slope angle,and the fragmentation intensity of the front region of the rock block is always higher than that of the rear region.Additionally,the slope angle can significantly affect the damage ratio,energy dissipation,and the ratio of tensile crack to shear crack during the rockslides.The number of the fragments having higher flying velocities and larger flying angles increases with increasing the slope angle,which contributes to a larger spreading distance and a wider deposition area.
文献关键词：
中图分类号：
作者姓名：
LIU Yang;WENG Lei;CHU Zhao-fei
作者机构：
School of Civil Engineering,Wuhan University,Wuhan 430072,China
文献出处：
引用格式：
[1]LIU Yang;WENG Lei;CHU Zhao-fei-.Numerical investigation of rock dynamic fragmentation during rockslides using a coupled 3D FEM-DEM method)[J].山地科学学报（英文版）,2022(04):1051-1069
A类：
rockslides,Rockslides
B类：
Numerical,investigation,dynamic,fragmentation,during,using,coupled,FEM,DEM,method,one,most,common,geological,hazards,mountainous,areas,threats,safety,human,lives,infrastructures,Studying,process,characteristics,blocks,great,significance,In,this,study,influences,slope,damage,energy,evolution,fragments,flying,velocity,were,systematically,investigated,An,improved,search,algorithm,was,first,proposed,more,effectively,extract,information,after,impacting,input,parameters,numerical,modeling,carefully,calibrated,quasi,static,uniaxial,compression,tests,complex,sliding,along,inclined,simulated,results,indicate,that,intensity,gradually,increases,increasing,front,region,always,higher,than,rear,Additionally,significantly,affect,ratio,dissipation,tensile,crack,shear,number,having,velocities,larger,angles,which,contributes,spreading,distance,wider,deposition
AB值：
0.505659
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