A block particle coupled model and its application to landslides  

作　　者：Chun Feng Shihai Li Qindong Lin 

机构地区：[1]Institute of Mechanics,Chinese Academy of Sciences,Beijing 100190,China [2]School of Engineering Science,University of Chinese Academy of Sciences(UCAS),Beijing 100049,China [3]International Centre for Numerical Methods in Engineering(CIMNE),Universitat Politècnica de Catalunya,Barcelona,Spain

出　　处：《Theoretical & Applied Mechanics Letters》2020年第2期79-86,共8页力学快报（英文版）

基　　金：supported by the National Key Research and Development Project of China,the Ministry of Science and Technology of China(Grant 2018YFC1505504)。

摘　　要：To simulate the progressive failure of slope,a block particle coupled model is introduced.Particle oriented cell mapping(POCM)algorithm is used to enhance the search efficiency,and particlepoint,particle-edge,particle-face contact detecting method is adopted to establish contact pair between particles and blocks precisely.Strain softening Mohr Coulomb model with tensile cutoff is adopted for blocks,and brittle Mohr Coulomb model is used for particles.The particle-block replacement approach is used to describe the fracture and fragmentation process of continuum media.Once the cohesion or tensile strength of one block reaches zero,the block will be deleted,and particles are generated at the same place with all information inherited from the deleted block.Some numerical cases related to landslides demonstrate the precision and rationality of the coupled model.

关 键 词：Finite ELEMENT METHOD Discrete ELEMENT METHOD Fracture FRAGMENTATION LANDSLIDE 

分 类 号：P642.22[天文地球—工程地质学] O29[天文地球—地质矿产勘探]