Open Access

ARTICLE

Analysis of One-Dimensional Compression under a Wide Range of Stress with Densely Arrayed BPM

by Tao Zhang^1,*, Ke Xu^1,2, Wenxiong Huang¹

1 College of Mechanics and Materials, Hohai University, Nanjing, 211100, China
2 School of Civil Engineering, Xuchang University, Xuchang, 461000, China

* Corresponding Author: Tao Zhang. Email: zht

(This article belongs to the Special Issue: Computational Mechanics of Granular Materials and its Engineering Applications)

Computer Modeling in Engineering & Sciences 2021, 127(3), 1101-1117. https://doi.org/10.32604/cmes.2021.015406

Received 16 December 2020; Accepted 19 February 2021; Issue published 24 May 2021

Abstract

In this paper, the densely arrayed bonded particle model is proposed for simulation of granular materials with discrete element method (DEM) considering particle crushing. This model can solve the problem of pore calculation after the grains are crushed, and reduce the producing time of specimen. In this work, several one-dimensional compressing simulations are carried out to investigate the effect of particle crushing on mechanical properties of granular materials under a wide range of stress. The results show that the crushing process of granular materials can be divided into four different stages according to e_r-logσ_y curves. At the end of the second stage, there exists a yield point, after which the physical and mechanical properties of specimens will change significantly. Under extremely high stress, particle crushing will wipe some initial information of specimens, and specimens with different initial gradings and void ratios present some similar characteristics. Particle crushing has great influence on grading, lateral pressure coefficient and compressibility of granular materials, and introduce extra irreversible volume deformation, which is necessary to be considered in modelling of granular materials in wide stress range.

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Keywords

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