| ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS |
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Correlation mechanism between force chains and friction mechanism during powder compaction |
| Ning Zhang(张宁)†, Shuai Zhang(张帅), Jian-Jun Tan(谈健君), and Wei Zhang(张炜) |
| School of Mechanical & Automotive Engineering, Fujian University of Technology, Fuzhou 350118, China |
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Abstract The relation between friction mechanism and force chains characteristics has not yet been fully studied in the powder metallurgy research area. In this work, a uniaxial compression discrete element model is established based on the compaction process of ferrous powder. Furthermore, the correlation mechanism between force chains and the friction mechanism during powder compaction is investigated. The simulation results reveal a strong correlation between the variation of the friction coefficient and the evolution of force chains. During the powder compaction, the friction coefficient would eventually tend to be stable, a feature which is also closely related to the slip ratio between particles. The side wall friction and the friction between particles would have an important effect on the direction of force chain growth in about one-third of the area near the side wall. The research results provide theoretical guidance for improving the densification process of the powder according to the force chain and friction.
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Received: 10 May 2021
Revised: 19 June 2021
Accepted manuscript online: 23 June 2021
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PACS:
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45.70.-n
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(Granular systems)
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45.70.Cc
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(Static sandpiles; granular compaction)
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62.20.Qp
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(Friction, tribology, and hardness)
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62.20.-x
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(Mechanical properties of solids)
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| Fund: Project supported by the Natural Science Foundation of Fujian Province, China (Grant No. 2020J01869), the Initial Scientific Research Fund in Fujian University of Technology, China (Grant No. GY-Z19123), and the Fujian Provincial Science and Technology Guiding Project, China (Grant No. 2017H0002). |
Corresponding Authors:
Ning Zhang
E-mail: zhangning138@126.com
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Cite this article:
Ning Zhang(张宁), Shuai Zhang(张帅), Jian-Jun Tan(谈健君), and Wei Zhang(张炜) Correlation mechanism between force chains and friction mechanism during powder compaction 2022 Chin. Phys. B 31 024501
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