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Lookup NU author(s): Chao Zhang, Dr Sadaf MaramizonouzORCiD, Dr David MilledgeORCiD, Dr Sadegh NadimiORCiD
This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0).
This study presents an electro-mechanical contact model to investigate the electrical response within a particulate system under mechanical loading. The model considers the electrical resistance across particle-to-particle and particle-to-wall contacts by formulating bulk and contact resistances, separately. Hertz and Holm's models are utilised for the contact resistance in the overlapping region. The bulk resistance for the particles is estimated considering particle geometry transformations during the compression. The proposed electro-mechanical contact model is verified and validated against published analytical solutions and experimental data. Finally, the contact model is applied to simulate a high-pressure torsion test to investigate the influence of three different materials on the electrical conduction properties of the system after particle fragmentation. The intensity distributions of electric potential, current and resistance of the granular system are analysed at both particle and system scales. An electroactivity index is proposed for evaluating the contribution of each fragment sieve cut on the bulk electrical conduction behaviour.
Author(s): Zhang C, Maramizonouz S, Milledge D, Nadimi S
Publication type: Article
Publication status: Published
Journal: Powder Technology
Year: 2024
Volume: 440
Print publication date: 01/05/2024
Online publication date: 11/04/2024
Acceptance date: 09/04/2024
Date deposited: 12/04/2024
ISSN (print): 0032-5910
ISSN (electronic): 1873-328X
Publisher: Elsevier BV
URL: https://doi.org/10.1016/j.powtec.2024.119759
DOI: 10.1016/j.powtec.2024.119759
Data Access Statement: Data will be made available on request.
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