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Article

Discrete Element Method Modeling for the Failure Analysis of Dry Mono-Size Coke Aggregates

1
Aluminum Research Centre–REGAL, Mining, Material, and Metallurgy Engineering Department, Université Laval, 1065 Avenue de la Médecine, Québec, QC G1V 0A6, Canada
2
Eddyfi Technologies Company, 3425 Rue Pierre-Ardouin, Québec, QC G1P 0B3, Canada
3
Chemical Engineering Department, Université Laval, 1065 Avenue de la Médecine, Québec, QC G1V 0A6, Canada
*
Author to whom correspondence should be addressed.
Academic Editor: Pihua Wen
Materials 2021, 14(9), 2174; https://doi.org/10.3390/ma14092174
Received: 13 March 2021 / Revised: 14 April 2021 / Accepted: 20 April 2021 / Published: 23 April 2021
An in-depth study of the failure of granular materials, which is known as a mechanism to generate defects, can reveal the facts regarding the origin of the imperfections, such as cracks in the carbon anodes. The initiation and propagation of the cracks in the carbon anode, especially the horizontal cracks below the stub-holes, reduce the anode efficiency during the electrolysis process. The failure analysis of coke aggregates can be employed to determine the appropriate recipe and operating conditions in order to avoid the formation of cracks in the carbon anodes. In this paper, it will be shown that a particular failure mode can be responsible for the crack generation in the carbon anodes. The second-order work criterion is employed to analyze the failure of the coke aggregate specimens and the relationships between the second-order work, the kinetic energy, and the instability of the granular material are investigated. In addition, the coke aggregates are modeled by exploiting the discrete element method (DEM) to reveal the micro-mechanical behavior of the dry coke aggregates during the compaction process. The optimal number of particles required for the failure analysis in the DEM simulations is determined. The effects of the confining pressure and strain rate as two important compaction process parameters on the failure are studied. The results reveal that increasing the confining pressure enhances the probability of the diffusing mode of the failure in the specimen. On the other hand, the increase of strain rate augments the chance of the strain localization mode of the failure in the specimen. View Full-Text
Keywords: carbon anode production; crack generation; discrete element method; failure analysis; second-order work criterion; strain localization carbon anode production; crack generation; discrete element method; failure analysis; second-order work criterion; strain localization
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MDPI and ACS Style

Sadeghi-Chahardeh, A.; Mollaabbasi, R.; Picard, D.; Taghavi, S.M.; Alamdari, H. Discrete Element Method Modeling for the Failure Analysis of Dry Mono-Size Coke Aggregates. Materials 2021, 14, 2174. https://doi.org/10.3390/ma14092174

AMA Style

Sadeghi-Chahardeh A, Mollaabbasi R, Picard D, Taghavi SM, Alamdari H. Discrete Element Method Modeling for the Failure Analysis of Dry Mono-Size Coke Aggregates. Materials. 2021; 14(9):2174. https://doi.org/10.3390/ma14092174

Chicago/Turabian Style

Sadeghi-Chahardeh, Alireza, Roozbeh Mollaabbasi, Donald Picard, Seyed M. Taghavi, and Houshang Alamdari. 2021. "Discrete Element Method Modeling for the Failure Analysis of Dry Mono-Size Coke Aggregates" Materials 14, no. 9: 2174. https://doi.org/10.3390/ma14092174

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