岩质颗粒破碎数值模拟研究进展  

Progress in Numerical Simulation Study of Rock Particle Crushing

作　　者：徐可 黄文雄[2] 王建敏 张涛[2] 陈丁[2] XU Ke;HUANG Wen-xiong;WANG Jian-min;ZHANG Tao;CHEN Ding(College of Civil Engineering,Xuchang University,Xuchang 461000,China;Colleage of Mechanics and Materials,Hohai University,Nanjing 210098,China)

机构地区：[1]许昌学院土木工程学院,许昌461000 [2]河海大学力学与材料学院,南京210098

出　　处：《科学技术与工程》2019年第21期8-14,共7页Science Technology and Engineering

基　　金：国家自然科学基金(11712117);河南省重点研发与推广专项(科技攻关)(192102310480);许昌学院科研基金(2019YB008)资助

摘　　要：天然岩质颗粒材料在较大外力作用下,会发生颗粒破碎现象,从而影响到材料的强度、变形、渗透等性能,关系到工程的安全。限于试验条件、颗粒尺寸和形状等因素的制约,数值模拟成为研究颗粒破碎问题越来越重要的一种方法。通过回顾国内外的研究成果,总结了两类重要的数值模拟方法:连续介质力学数值模拟方法和离散元数值模拟方法。通过归纳每种数值模拟方法,重点分析了两种模拟颗粒破碎过程的离散元数值模拟方法:碎片替换模型和凝聚颗粒模型,通过整理两种模型的研究内容及特点,讨论了现有方法存在的优势及局限性,并提出了基于离散元方法研究颗粒破碎问题可能性方向。When the natural rock particle material is under the action of a large external force,the particle breakage phenomenon will occur,which affects the strength,deformation and penetration of the material,and is related to the safety of the project.Limited to the constraints of test conditions,particle size and shape,numerical simulation has become an increasingly important method to study the problem of particle breakage.By reviewing the research results at home and abroad,two kinds of important numerical simulation methods are summarized: continuum mechanics method (CMM) and discrete element method (DEM).By summarizing each numerical simulation method,two discrete element numerical simulation methods for simulating particle crushing process are analyzed: the fragment replacement model (FRM) and the bonded-particle model (BPM).By arranging the research contents and characteristics of the two models,the advantages and limitations of the existing methods are discussed,and the possibility of particle breakage based on DEM is proposed.

关 键 词：颗粒材料 颗粒破碎 数值模拟 碎片替换模型 凝聚颗粒模型 

分 类 号：TU452[建筑科学—岩土工程]