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New Advancements in Computational Particle Mechanics
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New Advancements in Computational Particle Mechanics

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Materials Physics".

Deadline for manuscript submissions: closed (20 November 2023) | Viewed by 11113

Special Issue Editor

Dr. Xia Hua

E-Mail Website
Guest Editor
Mechanical Engineering and Automation, Zhejiang University of Technology, Hangzhou 310014, China
Interests: computational particle mechanics; DEM; granular materials; particle breakage; particle cohesion

Special Issue Information

Dear Colleagues,

Numerical simulation is an increasingly powerful tool in extensive research studies and applications involving granular materials. Various computational methods, such as discrete element method (DEM), computational fluid dynamics (CFD), Monte Carlo method (MCM), molecular dynamics (MD), and smoothed particle hydrodynamics (SPH), are employed to simulate the mechanical behaviors of granular materials under various conditions, and many physical insights are obtained from the simulations.

DEM is applied to study the mechanical properties of various particle materials, especially granular materials. Granular materials are very common and widespread in the natural environment, daily life and industrial production. DEM is still in its development stage, but is the main and most powerful tool. DEM is widely used in various fields of research, such as automotive engineering, railway engineering, aircraft, and electric vehicle power batteries. Therefore, its applications will become increasingly extensive. The purpose of this Special Issue is to explore new developments in DEM for granular dynamics modeling, including but not limited to the following topics:

  • New numerical methods to model complex particles or address the problems which remained unresolved before.
  • Significant improvements to existing methods for better accuracy and efficiency or enhanced capacity.
  • Novel applications of computational particle mechanics to new or interdisciplinary fields.
  • Research on the microstructure of materials.
  • More accurate and convenient tools for computational particle mechanics.
  • Extended application of computational particle mechanics in engineering.
  • New insights into some critical scientific problems of granular materials based on numerical simulations.

We look forward to receiving many excellent research papers for this Special Issue. Your contributions will promote both the scientific research and industrial applications of granular materials.

Dr. Xia Hua
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Materials is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • computational particle mechanics
  • discrete element method
  • granular materials
  • computational simulation
  • classical mechanic
  • microstructure
  • high-performance computation

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Further information on MDPI's Special Issue policies can be found here.

Published Papers (4 papers)

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Research

15 pages, 60380 KiB  
Article
Effects of Fiber Shape on Mechanical Properties of Fiber Assemblies
by Dandan Xu, Huibin Ma and Yu Guo
Materials 2023, 16(7), 2712; https://doi.org/10.3390/ma16072712 - 29 Mar 2023
Cited by 3 | Viewed by 2171
Abstract
The effects of fiber shape on the mechanical responses of fiber assemblies under compression, tension, and shear deformations are numerically investigated using the discrete element method (DEM). Simulations of the compression of ring-shaped fibers are consistent with experimental results, verifying the discrete element [...] Read more.
The effects of fiber shape on the mechanical responses of fiber assemblies under compression, tension, and shear deformations are numerically investigated using the discrete element method (DEM). Simulations of the compression of ring-shaped fibers are consistent with experimental results, verifying the discrete element method code. In the compressive tests of S-shaped fibers, pressure exhibits a nonmonotonic dependence on fiber curvature; while in the tensile tests, yield tensile stress generally decreases with increasing fiber curvature. In the shear tests, yield shear stress decreases with increasing fiber curvature for the S-shaped fibers, and the smallest yield shear stresses and the smallest coordination numbers are obtained for U-shaped and Z-shaped fibers. It is interesting to observe that for the assemblies of various fiber shapes, yield shear stress increases with increasing maximum Feret diameter of the fibers, which characterizes the largest dimension of a fiber between two parallel tangential lines. These novel observations of the effects of fiber shape provide some guidelines for material designs with the fibers. Full article
(This article belongs to the Special Issue New Advancements in Computational Particle Mechanics)
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21 pages, 14805 KiB  
Article
3D DEM Simulations and Experiments on Spherical Impactor Penetrating into the Elongated Particles
by Ping Li, Yanjie Li, Xia Hua, Yu Guo and Jennifer Sinclair Curtis
Materials 2023, 16(4), 1664; https://doi.org/10.3390/ma16041664 - 16 Feb 2023
Cited by 3 | Viewed by 2064
Abstract
In this study, a brass or glass spherical impactor vertically penetrating into a granular bed composed of mono-sized spherical or elongated particles was simulated with three-dimensional (3D) discrete element method (DEM). Good agreement of the particle masses in the cup before and after [...] Read more.
In this study, a brass or glass spherical impactor vertically penetrating into a granular bed composed of mono-sized spherical or elongated particles was simulated with three-dimensional (3D) discrete element method (DEM). Good agreement of the particle masses in the cup before and after penetration can be found in the simulations and experiments. The effects of particle length (Lp), friction coefficient, and particle configuration on the penetration depth of the impactor, ejecta mass, and solid volume fraction describing the response of the granular bed are discussed. The penetration depth is negatively correlated with Lp as the corresponding solid volume fraction of the granular bed decreases. A smaller friction coefficient leads to a larger penetration depth of the impactor and more ejection of particles. When the impactor is penetrating the Lp = 10 mm elongated particles, the penetration depth is negatively correlated to the order parameter and solid volume fraction. Full article
(This article belongs to the Special Issue New Advancements in Computational Particle Mechanics)
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17 pages, 5035 KiB  
Article
Numerical Analysis of the Effect of Retaining Ring Structure on the Chemical Mechanical Polishing Abrasive Motion State
by Siqi Zhang, Yiran Liu, Weimin Li, Jun Cao, Jiaye Huang, Lei Zhu and Zijun Guan
Materials 2023, 16(1), 62; https://doi.org/10.3390/ma16010062 - 21 Dec 2022
Cited by 5 | Viewed by 3193
Abstract
Optimizing the retaining ring structure can improve the quality of Chemical Mechanical Polishing (CMP). This study establishes a two-dimensional Computational Fluid Dynamics-Discrete Element Method (CFD-DEM) model, while the model is validated by experiments. The results graphically demonstrate the influence of the retaining ring [...] Read more.
Optimizing the retaining ring structure can improve the quality of Chemical Mechanical Polishing (CMP). This study establishes a two-dimensional Computational Fluid Dynamics-Discrete Element Method (CFD-DEM) model, while the model is validated by experiments. The results graphically demonstrate the influence of the retaining ring groove design on the motion of the slurry abrasive particles. The size of the retaining ring groove appears to have a threshold value, above which the abrasives start to have significant distribution in the wafer region. As the groove size continues to increase, the number of abrasives entering the ring increases abruptly and oscillates at specific nodes. The abrasive transfer rate increases with the number of grooves in the early stage but reaches a limit at a certain number of grooves. Meanwhile, the retaining ring position affects the transfer of the abrasives. This study provides a base for optimizing the design of retaining rings. Full article
(This article belongs to the Special Issue New Advancements in Computational Particle Mechanics)
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17 pages, 5191 KiB  
Article
Modelling of the Fine-Grained Materials Briquetting Process in a Roller Press with the Discrete Element Method
by Michał Bembenek, Magdalena Buczak and Kostiantyn Baiul
Materials 2022, 15(14), 4901; https://doi.org/10.3390/ma15144901 - 14 Jul 2022
Cited by 15 | Viewed by 2541
Abstract
By using the Altair® EDEM™ software, which implements the discrete element method, modelling and further study of the processes occurring in the roller press’s deformation area were carried out. It was shown that the discrete element method makes it possible to accurately [...] Read more.
By using the Altair® EDEM™ software, which implements the discrete element method, modelling and further study of the processes occurring in the roller press’s deformation area were carried out. It was shown that the discrete element method makes it possible to accurately describe the phenomena occurring in the area of roller press deformation compared with the finite element method. Models of material compaction in a roller press are developed using calcium hydroxide (slaked lime) and copper ore concentrate. The developed model makes it possible to determine the process’s energy parameters and the material’s compaction characteristics, taking into account the characteristics of its constituent particles. It was shown that discrete element modelling could be used effectively to create roller presses that provide rational characteristics of the briquetting process, taking into account the properties of the material being briquetted and the operating modes of the equipment. The results of the studies provided the basis for the applicability of the development of the discrete element method for describing the phenomena occurring in roller presses and accelerating the design of press equipment and briquetting technological processes. Full article
(This article belongs to the Special Issue New Advancements in Computational Particle Mechanics)
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