From solid-like to floating: evolution of dense granular cluster in dissipation behavior

IF 2.3 3区工程技术 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Granular Matter Pub Date : 2023-12-21 DOI:10.1007/s10035-023-01385-0

Kai Zhang, Meng Chen, Farong Kou, Fugui Sun

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Abstract

Granular materials used for vibration reduction often show dense granular clusters in engineering practice. Nevertheless, there are great differences in the damping effect between different dense granular clusters. In this work, discrete element simulations are performed to investigate the evolution of dense granular cluster in dissipation behavior by vertically vibrating a quasi-2D granular container with constant excitation frequency but different excitation amplitude, which reveals nine different granular motion patterns. Simulation results indicate that, with the increase of excitation amplitude, the internal configuration of dense granular cluster in granular container evolves gradually from static-disordered to dynamic-disordered and then dynamic-ordered, and finally becomes loose. The scope of high damping granular phases (HDGPs) is finalized based on the friction dissipation mechanism of granular balls in four dynamic-ordered dense granular clusters, where there may be reversible granular jamming transitions. The universal dynamical behavior of dense granular clusters in HDGPs is revealed, which contributes to obtaining the optimal granular damping effect by controlling the motion pattern of vibrated granular materials.

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从固态到浮动：致密颗粒团簇在耗散行为中的演变

在工程实践中，用于减震的粒状材料通常表现为致密的粒状团块。然而，不同致密颗粒团块的阻尼效果存在很大差异。本文通过离散元模拟，以恒定的激励频率和不同的激励振幅垂直振动准二维颗粒容器，研究了致密颗粒簇在耗散行为中的演变，揭示了九种不同的颗粒运动模式。仿真结果表明，随着激励振幅的增大，颗粒容器中致密颗粒团的内部构型由静态有序逐渐演变为动态有序，再到动态有序，最后变得松散。高阻尼颗粒相（HDGPs）的范围是根据颗粒球在四个动态有序致密颗粒团中的摩擦耗散机制确定的，其中可能存在可逆的颗粒堵塞过渡。揭示了 HDGPs 中致密颗粒簇的普遍动力学行为，有助于通过控制振动颗粒材料的运动模式获得最佳颗粒阻尼效果。

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来源期刊

Granular Matter Materials Science-General Materials Science

CiteScore

4.60

自引率

8.30%

发文量

审稿时长

6 months

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.