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Title: Investigation of elemental shape for 3D DEM modeling of interaction between soil and a narrow cutting tool
Authors: Ono, Ikuya
Nakashima, Hiroshi  kyouindb  KAKEN_id  orcid (unconfirmed)
Shimizu, Hiroshi  kyouindb  KAKEN_id
Miyasaka, Juro  kyouindb  KAKEN_id
Ohdoi, Katsuaki  kyouindb  KAKEN_id
Author's alias: 中嶋, 洋
Keywords: DEM
Soil cutting resistance
Elemental shape
Specific cutting resistance
Issue Date: Aug-2013
Publisher: Elsevier Ltd.
Journal title: Journal of Terramechanics
Volume: 50
Issue: 4
Start page: 265
End page: 276
Abstract: Discrete Element Method (DEM) has been applied in recent studies of soil cutting tool interactions in terramechanics. Actual soil behavior is well known to be inexpressible by simple elemental shapes in DEM, such as circles for 2D or spheres for 3D because of the excessive rotation of elements. To develop a more effective model for approximating real soil behavior by DEM, either the introduction of a rolling resistance moment for simple elemental shape or the combination of simple elements to form a complex model soil particle shape cannot be avoided. This study was conducted to investigate the effects of elemental shape on the cutting resistance of soil by a narrow blade using 3D DEM. Six elemental shapes were prepared by combining unit spheres of equal elemental radius. Moreover, cutting resistance was measured in a soil bin filled with air-dried sand to collect comparative data. The elemental shape, with an axial configuration of three equal spheres overlapped with each radius, showed similar results of soil cutting resistance to those obtained experimentally for the six elemental shapes investigated.
Rights: © 2013 ISTVS. Published by Elsevier Ltd.
This is not the published version. Please cite only the published version.
DOI(Published Version): 10.1016/j.jterra.2013.09.001
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