3-D DEM simulation of cohesive soil-pushing behavior by bulldozer blade

被引：91

作者：

Tsuji, T. ^{[1
,2
]}

Nakagawa, Y. ^{[1
,2
]}

Matsumoto, N. ^{[3
]}

Kadono, Y. ^{[3
]}

Takayama, T. ^{[1
]}

Tanaka, T. ^{[1
,2
]}

机构：

[1] Osaka Univ, Komatsu Joint Res Lab, Suita, Osaka 5650871, Japan

[2] Osaka Univ, Dept Mech Engn, Suita, Osaka 5650871, Japan

[3] Komatsu Ltd, Construct Equipment Tech Ctr 1, Hirakata, Osaka 5731011, Japan

来源：

JOURNAL OF TERRAMECHANICS | 2012年 / 49卷 / 01期

关键词：

Discrete element method; Cohesive soil; Liquid bridge; Bulldozer; Blade; Soil-blade interaction; DISTINCT ELEMENT METHOD; NUMERICAL-SIMULATION; MECHANICAL-BEHAVIOR; GRANULAR-MATERIALS; PARTICLES; MODEL; FLOW;

D O I：

10.1016/j.jterra.2011.11.003

中图分类号：

X [环境科学、安全科学];

学科分类号：

083001 [环境科学];

摘要：

A numerical simulation based on discrete element method (DEM) was conducted on the excavation and pushing processes of soil by a bulldozer blade. Soil contains water and the resistance acting on the bulldozer blade is largely influenced by the cohesive force due to liquid bridges formed among soil particles. In the present study, a cohesive bond force model proposed by Utili and Nova [5] was introduced in which the microscopic behavior of cohesive force was modeled analogously with macroscopic shear failure characteristics. The dependency on the magnitude of microscopic cohesive force was verified. The behavior of particles changed greatly by taking into account the cohesive bond force. The characteristic behavior of excavated soil aggregates, such as rolling motion and intermittent collapsing, were observed in front of the blade surface. (C) 2011 ISTVS. Published by Elsevier Ltd. All rights reserved.

引用

页码：37 / 47

页数：11

共 12 条

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DISCRETE NUMERICAL-MODEL FOR GRANULAR ASSEMBLIES [J].