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Indexed by:期刊论文

Date of Publication:2017-12-01

Journal:COMPUTERS AND GEOTECHNICS

Included Journals:Scopus、SCIE、EI

Volume:92

Page Number:22-40

ISSN No.:0266-352X

Key Words:Discrete Element Method (DEM); Tri-axial test; Fujian quartz sand; Calibration procedure; Microscopic parameters

Abstract:A calibration procedure, in which coupled effects of microscopic parameters are considered, is proposed to determine the values of the microscopic parameters in the Discrete Element Method (DEM) for Fujian quartz sand. Laboratory tri-axial, tests are conducted to be compared with the DEM simulations and the effects of end restraint in the laboratory tests are eliminated through a digital image measurement system. Sensitivities of the macroscopic behaviour of the specimen to the microscopic parameters are analyzed through DEM simulations. Four coupled effects of the microscopic parameters on the macroscopic behaviour are investigated through a graphic method and then considered in the calibration procedure. (C) 2017 Elsevier Ltd. All rights reserved.