Simulation of the deformable lateral boundaries in biaxial test using DEM
作者机构：WSP3 Wellington PlaceLeedsLS1 4APUK Hull UniversityHullHU6 7RXUK School of Civil EngineeringUniversity of LeedsLeedsLS2 9JTUK School of Computer ScienceUniversity of HullHullHU6 7RXUK School of Chemical and Process EngineeringUniversity of LeedsLeedsLS2 9JTUK
出 版 物：《Particuology》 (颗粒学报（英文版）)
年 卷 期：2024年第88卷第5期
页 面：161-175页
核心收录：
学科分类：08[工学] 0801[工学-力学（可授工学、理学学位）]
主 题：Discrete element method Biaxial test Deformable boundaries Shear band Critical state Fabric anisotropy Geometrical stability index
摘 要：Applying the discrete element method(DEM)in soil mechanics can provide abundant information at the particle-scale and facilitates illustration of the macro-mechanical behaviour of soils based on the inter-particle *** triaxial test is one of the most common laboratory methods to study the macro-mechanical behaviour of particulate materials such as ***,many problems in geotechnical design can be assumed and simplified as a plane strain *** a biaxial test can be conducted to reproduce the macro-mechanical behaviour of soil,where the sample is enclosed by two horizontal rigid platens and a vertical latex membrane,which is a deformable continuous element and allows the enclosed specimen to deform freely while maintaining confining stress during *** paper presents an algorithm to represent physical and mechanical characteristics of latex membrane in the 2D DEM simulation of biaxial test using the PFC^(2D) *** investigate the impact of the lateral boundary conditions on the micro-macro mechanical behaviours of soil samples,two sets of DEM biaxial tests are conducted,*** rigid and deformable lateral boundary *** DEM modeling results indicate that the lateral boundary conditions have a significant effect on the micro-scale fabric properties,thickness and inclination of the shear *** comparison between these two simulations also demonstrates that the lateral boundary conditions play a major role in the peak and post-peak stress-strain behaviours as well as the dilation and critical state behaviours of granular soils.
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