Onset and impact of plastic deformation in granular compaction

被引：1

作者：

Clemmer, Joel T. ^{[1
]}

Lechman, Jeremy B. ^{[1
]}

机构：

[1] Sandia Natl Labs, Albuquerque, NM 87185 USA

来源：

POWDER TECHNOLOGY | 2025年 / 452卷

关键词：

Granular compaction; High pressure; Bonded particle modeling; Plastic deformation; SINGLE-PARTICLE COMPRESSION; ELASTIC PROPERTIES; MODEL; BEHAVIOR; SPHERES;

D O I：

10.1016/j.powtec.2024.120563

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

The role of plastic deformation in the high-pressure compaction of granular material is investigated using bonded particle model simulations. Grains are discretized into a set of computational particles connected by pairwise bonds. Bonds are harmonic up to a plastic onset strain lp above which they yield, capping out at a maximum force and producing an elastic-perfectly-plastic-like mechanical response in grains. Packings containing over one thousand monodisperse spherical grains are isotropically compacted to different packing fractions to quantify how decreasing lp softens the rise in pressure and impacts effective elastic properties of the confined system. By isolating the relative decrease in pressure due to plasticity, we find data can be collapsed across a wide range of values of lp suggesting that relatively simple mathematical descriptions may capture plasticity's effect in granular compaction. Lastly, we study the microscopic statistics of local strains in grains and connect their evolution to the observed macroscopic behavior.

引用

页数：9

共 45 条

[1] Internal states of model isotropic granular packings. I. Assembling process, geometry, and contact networks [J].