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http://dx.doi.org/10.9711/KTAJ.2012.14.4.321

Surface roughness crushing effect on shear behavior using PFC  

Kim, Eun-Kyung (건국대학교 사회환경시스템공학과)
Jeong, Da-Woon (건국대학교 사회환경시스템공학과)
Lee, Seok-Won (건국대학교 사회환경시스템공학과)
Publication Information
Journal of Korean Tunnelling and Underground Space Association / v.14, no.4, 2012 , pp. 321-336 More about this Journal
Abstract
The shear behavior at the particle/surface interface such as rock joint can determine the mechanical behavior of whole structure. Therefore, a fundamental understanding of the mechanisms governing its behavior and accurately estimation of the interface strength is essential. In this paper, PFC, a numerical analysis program of discrete element method was used to investigate the effects of the surface roughness crushing on interface strength. The surface roughness was characterized by smooth, intermediate, and rough surface, respectively. Particle shape was classified into one ball model of circular shape and 3 ball model of triangular shape. The surface shape was modelled by wall model of non-crushing surface and ball model of crushing surface. The results showed that as the bonding strength of ball model decreases, lower interface strength is induced. After the surface roughness crushing was occurred, the interface strength tended to converge and higher bonding strength induced lower surface roughness crushing. Higher friction angle was induced in wall model and higher surface roughness induced the higher friction angle. From these findings, it is verified that the surface roughness and surface roughness crushing effect on the particle/surface interface shear behavior.
Keywords
Discrete element method; particle flow code 2D($PFC^{2D}$); particle/surface interface; surface roughness; surface roughness crushing;
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Times Cited By KSCI : 3  (Citation Analysis)
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