LUO Rudan; ZENG Zhikun; GE Zhuan; JIANG Yonglun; WANG Yujie

doi:10.7498/aps.74.20250231

Abstract

Granular materials are ubiquitous in nature and industrial production. Investigating the structure of packing is crucial for understanding the physical properties of granular materials. Owing to their symmetry and simple geometry, spherical particles have long served as an ideal model for studying granular packing, yielding numerous research outcomes.In recent years, the influence of particle shape on packing structures has drawn considerable attention. Non-spherical particles, characterized by complex shapes, tend to interlock and form stable structures. Their significant geometric cohesion notably affects the stability and porosity of granular packing.To investigate the structural evolution and compaction mechanisms of three-dimensional concave particles (hexapod-shaped) under external tapping, focusing on the role of geometric cohesion in enhancing mechanical stability, we employ hexapod-shaped particles that are composed of three mutually orthogonal spherocylinders in this study. The granular system subjected to consecutive tapping can reach a stationary state. In the densifying process of the system, packing structures with different volume fractions will be formed. Meanwhile, by combining with X-ray tomography, we can obtain the microstructure.The findings reveal that the volume fraction of “hexapod” particle packing is significantly lower than that of hard-sphere systems. The compaction curves of “hexapod” particles across varying tapping intensities are accurately described by the Kohlrausch-Williams-Watt (KWW) law, which is consistent with hard-sphere system, suggesting a relaxation process governed by heterogeneous modes. Furthermore, both the volume fraction of the steady-state granular packing and the average contact number exhibit an inverse relationship with tapping intensity, increasing as the intensity decreases. A detailed statistical analysis of contact points indicates that the compaction process of “hexapod” particles is predominantly influenced by two factors: the augmentation in the number of neighboring contacting particles and the modification of contact forms. These factors collectively enhance the degree of interlocking among hexapods within the system. Specifically, the compaction process is primarily propelled by the escalation in neighboring contacts and the refinement of contact types, particularly the increase in cylinder-cylinder (cc) contact. This rise in cc contact significantly enhances mechanical stability through strengthening geometric interlocking.This study reveals the structural evolution characteristics of non-spherical particles in the compaction process and provide important experimental support for understanding the unique mechanical and dynamic properties of concave particle packing. This research not only enriches the experimental data of granular packing structures but also offers a new perspective for exploring the universal laws of packing for particles of different shapes. This study is to lay a more solid foundation for the theoretical research and industrial applications of granular materials, thereby promoting technological progress and innovation in related fields.

Keywords:

packing of “hexapod” concave particles /
compaction process /
contact structure /
X-ray tomography technology

Authors and contacts

Corresponding author: WANG Yujie, yujiewang@sjtu.edu.cn

Funds: Project supported by the National Natural Science Foundation of China (Grant No. 12274292) and the Space Application System of China Manned Space Program (Grant No. KJZ-YY-NLT0504).

FullText HTML

References

[1]
[2]
[3]
[4]
[5]
[6]
[7]
[8]
[9]
[10]
[11]
[12]
[13]
[14]
[15]
[16]
[17]
[18]
[19]
[20]
[21]
[22]
[23]
[24]
[25]
[26]
[27]
[28]
[29]
[30]
[31]
[32]
[33]
[34]
[35]
[36]
[37]
[38]
[39]
[40]
[41]
[42]
[43]
[44]

Cited By

DownLoad: Full-Size Img PowerPoint

DownLoad: Full-Size Img PowerPoint

DownLoad: Full-Size Img PowerPoint

DownLoad: Full-Size Img PowerPoint

DownLoad: Full-Size Img PowerPoint

DownLoad: Full-Size Img PowerPoint

DownLoad: Full-Size Img PowerPoint

map

[1]
[2]
[3]
[4]
[5]
[6]
[7]
[8]
[9]
[10]
[11]
[12]
[13]
[14]
[15]
[16]
[17]
[18]
[19]
[20]
[21]
[22]
[23]
[24]
[25]
[26]
[27]
[28]
[29]
[30]
[31]
[32]
[33]
[34]
[35]
[36]
[37]
[38]
[39]
[40]
[41]
[42]
[43]
[44]

[1]	MA Cui, CHEN Peizhe, YANG Lu, HAN Tao, TANG Yun, CHEN Changyong, DING Zhihua. A machine learning approach to correct imaging distortions in swept-source optical coherence tomography. Acta Physica Sinica, 2025, 74(16): 164202. doi: 10.7498/aps.74.20250545
[2]	LIU Zelin, YUAN Houfei, ZENG Zhikun, JIANG Yonglun, GE Zhuan, WANG Yujie. Structures of binary hard-sphere packing under tapping. Acta Physica Sinica, 2025, 74(13): 134502. doi: 10.7498/aps.74.20250232
[3]	Jiang Yi-Min, Liu Mario. A thermodynamic model of grain-grain contact force. Acta Physica Sinica, 2018, 67(4): 044502. doi: 10.7498/aps.67.20171441
[4]	Sun Lu, Huo Yan, Zhou Chao, Liang Jian-Hui, Zhang Xiang-Zhi, Xu Zi-Jian, Wang Yong, Wu Yi-Zheng. STXM observation and quantitative study of magnetic vortex structure. Acta Physica Sinica, 2015, 64(19): 197502. doi: 10.7498/aps.64.197502
[5]	Wang Chen, An Hong-Hai, Wang Wei, Fang Zhi-Heng, Jia Guo, Meng Xiang-Fu, Sun Jin-Ren, Liu Zheng-Kun, Fu Shao-Jun, Qiao Xiu-Mei, Zheng Wu-Di, Wang Shi-Ji. Diagnoses of Au plasma with soft X-ray double frequency grating interference technique. Acta Physica Sinica, 2014, 63(12): 125210. doi: 10.7498/aps.63.125210
[6]	Yang Xiao-Jing, Fang Cong-Cong. Multi-scale analysis of nanoscale contact process between spherical indenter and single crystal aluminium. Acta Physica Sinica, 2013, 62(18): 180702. doi: 10.7498/aps.62.180702
[7]	Zhang Pin, Liang Yan-Mei, Chang Sheng-Jiang, Fan Hai-Lun. Kidney segmentation in computed tomography sequences based on energy minimization. Acta Physica Sinica, 2013, 62(20): 208701. doi: 10.7498/aps.62.208701
[8]	Duan Fang-Li, Wang Guang-Jian, Qiu He-Bing. Variation of adhesive force in the nanoscale contact. Acta Physica Sinica, 2012, 61(4): 046801. doi: 10.7498/aps.61.046801
[9]	Guan Jun-Wei, He Duan-Wei, Wang Hai-Kuo, Peng Fang, Xu Chao, Wang Wen-Dan, Wang Kai-Xue, He Kai. Influence of mechanical configuration and hardness of last stage anvil on high pressure producing efficiency for octahedral cell. Acta Physica Sinica, 2012, 61(10): 100701. doi: 10.7498/aps.61.100701
[10]	Ma Tian-Peng, Hu Li-Qun, Chen Kai-Yun. Study of central plasma structure using soft X-ray signals. Acta Physica Sinica, 2009, 58(2): 1110-1114. doi: 10.7498/aps.58.1110
[11]	Hu Guo-Qi, Tu Hong-En, Hou Mei-Ying. Energy dissipation during cooling process in granular gas under gravity. Acta Physica Sinica, 2009, 58(1): 341-346. doi: 10.7498/aps.58.341
[12]	Miao Tian-De, Yi Chen-Hong, Qi Yan-Li, Mu Qing-Song, Liu Yuan. Force transmission in three-dimensional hexagonal-close-packed granular arrays submitted to a point load. Acta Physica Sinica, 2007, 56(8): 4713-4721. doi: 10.7498/aps.56.4713
[13]	Zhang Yun. Polaron fluorescence and tomograpy of Ti:LiNbO3 waveguide. Acta Physica Sinica, 2007, 56(1): 280-284. doi: 10.7498/aps.56.280
[14]	Zheng Li-Jing, Li Shu-Suo, Li Huan-Xi, Chen Chang-Qi, Han Ya-Fang, Dong Bao-Zhong. Small angle x-ray scattering study on microstructure and mechanical property evo lutions of equal-channel angular pressed 7050 Al alloy. Acta Physica Sinica, 2005, 54(4): 1665-1670. doi: 10.7498/aps.54.1665
[15]	Zhou Bing-Qing, Liu Feng-Zhen, Zhu Mei-Fang, Gu Jin-Hua, Zhou Yu-Qin, Liu Jin-Long, Dong Bao-Zhong, Li Guo-Hua, Ding Kun. The microstructure of hydrogenated microcrystalline silicon thin films studied by small-angle x-ray scattering. Acta Physica Sinica, 2005, 54(5): 2172-2175. doi: 10.7498/aps.54.2172
[16]	Zhao Hui, Du Zhi-Wei, Zhou Tie-Tao, Liu Pei-Ying, Dong Bao-Zhong, Chen Chang-Qi. Small angle x-ray scattering study on microstructure evolution of the aging process of Al-Zn-Mg-Cu-Li alloy. Acta Physica Sinica, 2004, 53(4): 1251-1254. doi: 10.7498/aps.53.1251
[17]	YANG GUO-HONG, ZHANG JI-YAN, ZHANG BAO-HAN, ZHOU YU-QING, LI JUN. ANALYSIS OF FINE STRUCTURE OF X-RAY SPECTRA FROM LASER-IRRADIATED GOLD DOT. Acta Physica Sinica, 2000, 49(12): 2389-2393. doi: 10.7498/aps.49.2389
[18]	LUO YUAN-SU, ZAO JI-LIANG, HUANG SHENG-TAO. AN INVESTIGATION ON THE STRUCTURE OF GLASSY METALS BY X-RAY DIFFRACTION METHOD. Acta Physica Sinica, 1982, 31(9): 1256-1262. doi: 10.7498/aps.31.1256
[19]	. . Acta Physica Sinica, 1975, 24(4): 301-306. doi: 10.7498/aps.24.301
[20]	LIU SHU-I. LONG RANGE AND SHORT RANGE FRICTIONAL SLIP-LINES ON PLANE CONTACT SURFACE IN PLASTIC COMPRESSION (THE RULE OF ISOCLINIC GRADIENT). Acta Physica Sinica, 1958, 14(1): 9-16. doi: 10.7498/aps.14.9

Catalog

Vol. 74, Issue 13 - 2025-07-05

Metrics

Abstract views: 1744
PDF Downloads: 54
Cited By: 0

姓名
邮箱
手机号码
标题
留言内容
验证码

Search

Article

留言板

Abstract

Authors and contacts

Corresponding author: WANG Yujie, yujiewang@sjtu.edu.cn

FullText HTML

References

Cited By

Catalog

Metrics

Authors

Referees

About Journal

About

Search

Article

留言板

Abstract

Authors and contacts

Corresponding author: WANG Yujie, yujiewang@sjtu.edu.cn

FullText HTML

References

Cited By

Catalog

Metrics

Publishing process

Authors

Referees

About Journal

About