Method for evaluating modulus evolution of granular materials under dynamic loading

IF 2.4 3区工程技术

Granular Matter Pub Date : 2024-05-31 DOI:10.1007/s10035-024-01434-2

Lihong Tong, Li Fu, Haibin Ding, Zuxiang Lei, Rui Wang, Changjie Xu, Songyan Li

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引用次数: 0

Abstract

The softening effect has been widely accepted as the fundamental mechanical property of the granular materials, which underlies some specific phenomena such as fluidization during vibration. In this paper, a series of resonance column experiments are performed to observe the modulus softening of granular materials. A statistical softening model is subsequently proposed and its applicability is verified through a quantitative analysis of the variation of the normalized modulus by changing the external confining pressure. The average potential energy in grain contact has been found to be a power-law scaling with grain size. An evolution model is further implemented to account for the experimental findings on the evolution of modulus of the granular system subjected to different confining pressures. The modulus evolution, including softening and recovery, can be captured by the unified evolution model.

Graphical Abstract

Shear modulus evolution

Abstract Image

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动态加载下颗粒材料模量演变的评估方法

软化效应作为颗粒材料的基本力学性能已被广泛接受，它是振动过程中流化等一些特殊现象的基础。本文通过一系列共振柱实验来观察颗粒材料的模量软化。随后提出了一个统计软化模型，并通过对外部约束压力变化时归一化模量变化的定量分析验证了该模型的适用性。研究发现，晶粒接触中的平均势能与晶粒大小呈幂律缩放关系。为了解释不同约束压力下颗粒系统模量演变的实验结果，我们进一步建立了一个演变模型。统一的演化模型可以捕捉模量的演化，包括软化和恢复。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Granular Matter MATERIALS SCIENCE, MULTIDISCIPLINARY-MECHANICS

CiteScore

4.30

自引率

8.30%

发文量

期刊介绍： Although many phenomena observed in granular materials are still not yet fully understood, important contributions have been made to further our understanding using modern tools from statistical mechanics, micro-mechanics, and computational science. These modern tools apply to disordered systems, phase transitions, instabilities or intermittent behavior and the performance of discrete particle simulations. >> Until now, however, many of these results were only to be found scattered throughout the literature. Physicists are often unaware of the theories and results published by engineers or other fields - and vice versa. The journal Granular Matter thus serves as an interdisciplinary platform of communication among researchers of various disciplines who are involved in the basic research on granular media. It helps to establish a common language and gather articles under one single roof that up to now have been spread over many journals in a variety of fields. Notwithstanding, highly applied or technical work is beyond the scope of this journal.