Correlation mechanism between force chains and friction mechanism during powder compaction

Zhang, Ning; Zhang, Shuai; Tan, Jianjun; Zhang, Wei

doi:10.1088/1674-1056/ac0db1

Cited by 6 publications

(2 citation statements)

References 48 publications

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“…Granular matter has many particular mechanical properties which are highly different from ordinary solids and liquids, e.g., dilatancy, jamming, anisotropy and inhomogeneity. [1][2][3] These important and intriguing properties are usually explored by observing the dynamic response of intruders, such as spheres, [4][5][6][7] plates [8] and rods, [9][10][11] during the impact or penetration into granular matter. Many empirical scaling laws [5,8,9] and analytical models [6,11] successfully predict the resistance exerted on intruders when moving into dry granule.…”

Section: Introductionmentioning

confidence: 99%

Resistance law of a rod penetrating a multilayer granular raft

Li¹,

Tian²,

Hu³

2023

Chinese Phys. B

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This paper presents an experimental study on the resistance law of a rod vertically penetrating different kinds of multilayer granular rafts with a constant velocity so as to reveal the mechanical properties of the multilayer granular rafts. The resistance was quasi-static under the chosen velocity. Experiments were conducted with different granular thicknesses, rod diameters and combinations of particles and liquids. The study shows that the resistance-displacement relation of the rod has three smooth stages. In the first stage, the resistance rapidly increased. In the second stage, the resistance curve maintained an almost constant slope. In the third stage, the resistance smoothly changed with its slope continuously increasing. Based on the corresponding physical models for each stage, the study reveals the exponential dependence of the load-bearing capacity of the multilayer granular raft on its thickness, and clarifies the capillary effects on the resistance law. The study extends the knowledge of the granular raft from monolayer to multilayer structure.

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Section: Introductionmentioning

confidence: 99%

Resistance law of a rod penetrating a multilayer granular raft

Li¹,

Tian²,

Hu³

2023

Chinese Phys. B

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“…12) Zhang et al utilized DEM to investigate the correlation mechanism between force chains and the friction mechanism during powder compaction. 13) Xu and Meng employed DEM to study metal powder flow and force chain characteristics in high-velocity compaction. 14) Redanz and Fleck used DEM to investigate the yield surfaces for sticking and frictionless particle contacts in a 2-dimensional analysis.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Powder Compaction Process Using Multi-Particle Finite Element Method

et al. 2022

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Cold compaction is an essential step of the powder metallurgy process, which is cost-effective in the manufacturing industry. In the present study, the compaction of pure iron powder is investigated. A MATLAB code is developed to create a representative volume element with a given size distribution, number of particles, and initial relative density. The finite element analysis is performed by implementing an ABAQUS/ Explicit python script. Multi-particle finite element analysis of compaction is employed to analyze the deformation of the particles into the green body. The effects of loading path, geometry configuration, and wall friction on punch force, axial and transverse stresses, strains, and yield surface are discussed. The results indicate that wall friction affects the load, stress state, and yield surface. It was found that, with the increase of the wall friction from 0.0 to 0.2, the compaction force increases by 14.70%. Also, the difference between the upper and lower RVE face forces increases from 1.01% to 16.27%. Changing the loading path from the compression to the hydrostatic compaction decreases the compaction force by 57.7% in upper and 65.75% in lower RVE faces, while the axial stress decreases by 27.70% and the transverse stress increases by 40.41%. The volume strain of compaction is smaller by 35.33% than that of hydrostatic compression.

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