基于广义粘弹性颗粒材料的接触力模型
熊天伦，鲁录义
（华中科技大学能源与动力工程学院，湖北武汉430074）
摘要： 接触力模型一直是离散单元法研究中的热点。基于广义粘弹性材料建立了可以综合描述由蠕变和应力松弛引
起的粘性耗散的法向接触力模型，并通过粘弹性球体与刚性平面相互作用的有限元法进行了验证。由于模型的实施主要
依赖相对容易获得的材料应力松弛曲线而非恢复系数，因此更具有工程应用价值。
关键词： 离散单元法；接触力；粘弹性；有限元法
中图分类号： TB302.3 文献标识码： A 文章编号： 2095-0802-(2019)06-0002-04
Contact Force Model Based on Generalized Viscoelastic Granular Materials
XIONG Tianlun, LU Luyi
(School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan 430074, Hubei, China)
Abstract: The contact force model has always been a hot spot in the study of discrete element methods. This paper established
normal contact force model which can comprehensively describe the viscous dissipation caused by creep and stress relaxation
based on the generalized viscoelastic material, and verified it by the finite element method of the interaction between viscoelastic
sphere and rigid plane. Since the implementation of the model mainly relies on the relatively easy-to-obtain material stress relaxation
curve rather than the recovery factor, it is more valuable for engineering applications.

 Key words: discrete element method; contact force; viscoelasticity; finite element method