岩质颗粒破碎数值模拟研究进展

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。

Progress in Numerical Simulation Study of Rock Particle Crushing

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.