摘要
黏土的宏观力学性质与其微观结构密切关联,而离散单元法是研究岩土材料力学行为宏微观联系的重要工具。但是目前绝大多数离散元程序主要针对无黏性颗粒土而开发,能用于黏土研究的离散元程序十分少见。介绍了自主开发的考虑黏土颗粒的薄板形状以及颗粒间复杂物理-化学作用力的黏土离散元模拟程序,以及程序中碰撞检测和颗粒间双电层斥力、范德华力以及Born斥力的计算模块。最后,给出了一个基于该程序的简单模拟实例,初步验证了其合理性。
Macro mechanical properties of clayey soil are closely related to its microstructure,and discrete element method is an important tool to study the macro-micro link of mechanical behavior of geo-material.However,the majority of the present discrete element software package are developed for non-cohesive granular soil,and discrete element code applicable to clayey soil is rare.In this paper,we present a discrete element code for clayey soil which has taken account of the platy shape of clay particle and complicate physical-chemical interaction between clay particles.Especially,this paper highlights the collision detection and the calculation of double layer repulsive force,Van der Waals attractive force and Born repulsive force between clay particles.Finally,a simple application of the present discrete element code is given to validate its rationality preliminarily.
作者
商翔宇
鲁巨明
杨晨
周国庆
SHANG Xiangyu LU Juming YANG Chen ZHOU Guoqing(State Key Lab for Geomechanics and Deep Underground Engineering, China University of Mining and Technology, Xuzhou 221116, China School of Mechanics and Civil Engineering, China University of Mining and Technology, Xuzhou 221116, China China Railway Engineering Equipment Group Co. , Ltd. , Zhengzhou 450016, China)
出处
《防灾减灾工程学报》
CSCD
北大核心
2016年第4期657-663,共7页
Journal of Disaster Prevention and Mitigation Engineering
基金
国家自然科学基金项目(51009136)
江苏省自然科学基金项目(BK2011212)资助
关键词
离散单元法
双电层斥力
碰撞检测
代码开发
discrete element methods
double layer repulsive force
collision detection
code development
