Discrete element-embedded finite element model for simulation of soft particle motion and deformation

作     者：Xu Liu Nan Gui Xiyuan Cui Xingtuan Yang Jiyuan Tu Shengyao Jiang Xu Liu;Nan Gui;Xiyuan Cui;Xingtuan Yang;Jiyuan Tu;ShengyaoJiang

作者机构：Institute of Nuclear and New Energy TechnologyCollaborative Innovation Center of Advanced Nuclear Energy TechnologyKey Laboratory of Advanced Reactor Engineering and SafetyMinistry of EducationTsinghua UniversityBeijing 100084China School of EngineeringRMIT UniversityMelbourneVIC 3083Australia 

出 版 物：《Particuology》 (颗粒学报（英文版）)

年 卷 期：2022年第20卷第9期

页      面：88-100页

核心收录：

学科分类：0817[工学-化学工程与技术] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 0702[理学-物理学] 0801[工学-力学（可授工学、理学学位）] 

基　　金：the support of this research by the National Science and Technology Major Project(grant No.2011ZX06901-003) the National Natural Science Foundation of China(grant No.51576211) the National High Technology Research and Development Program of China(863)(grant No.2014AA052701) the funds of Nuclear Power Technology Innovation Centre(grant Nos.HDLCXZX-2020-HD-022 and HDLCXZX-2021-ZH-024) 

主　　题：Discrete element method Finite element method Soft particle Collision Particle packing Pebble bed 

摘      要：The motion and deformation of soft particles are commonly encountered and important in many appli-cations.A discrete element-embedded finite element model(DEFEM)is proposed to solve soft particle motion and deformation,which combines discrete element and finite element *** collisional surface of soft particles is covered by several dynamical embedded discrete elements(EDEs)to model the collisional external forces of the *** particle deformation,motion,and rotation are inde-pendent of each other in the *** deformation and internal forces are simulated using the finite element model,whereas the particle rotation and motion calculations are based on the discrete element *** inheriting the advantages of existing coupling methods,the contact force and contact search between soft particles are improved with the aid of the *** particle packing is simulated using the DEFEM for two cases:particle accumulation along a rectangular straight wall and a wall with an inclined *** large particle deformation in the lower layers can be simulated using current meth-ods,where the deformed particle shape is either irregular in the marginal region or nearly hexagonal in the tightly packed central *** method can also be used to simulate the deformation,motion,and heat transfer of non-spherical soft particles.