Simulation in the Interaction between Bulldozing Plate and Cohesive Soil by DEM
From the effects of liquid bridges on mechanical microstructure of cohesive soil, we found that the capillary forces and the dynamic viscous forces generated by liquid bridges had important effects on the interactions between soil particles in cohesive soil. Through introducing the parallel bonds to simulate the forces generated by liquid bridges, the nonlinear mechanical model of soil by Distinct Element Method (DEM) was established on the basis of the traditional mechanical model of DEM. The nonlinear mechanical model of soil by DEM could wholly reflect contact, slide, cohesion and energy-dissipated between soil particles in cohesive soil subjected to external forces. The interactions between a bulldozing plate with different curing angles and cohesive soil were simulated. The simulated results indicated that the dynamic behaviors of cohesive soil, including clods fragmentation, cracks initialization, coalescence and propagation near the blade, can be exactly simulated by DEM. At the same time, the changing rules and the influencing factors of the dynamic behaviors of cohesive soil subjected to the bulldozing plate with different curing angles were obtained from the mesoscopic motions of soil particles.
Dynamic behavior of cohesive soil parallel bond nonlinear mechaincal model of soil Distinct Element Method numeircal simulation
Rui Zhang Jianqiao Li Shucai Xu
Key Laboratory of Terrain-machine Bionics Engineering,Ministry of Education,Jilin University,Changch State Key Laboratory of Automotive Safety and Energy,Tsinghua University,Beijing,100084,China
国际会议
北京
英文
405-414
2008-09-24（万方平台首次上网日期，不代表论文的发表时间）