Sergeev Yu.S., Platov S.I., Guzeev V.I., Sergeev S.V., Puzankov M.S. Computer Modeling of a New Method of Controlled Cracking During Dimensional Crushing of Brittle Materials

DOI: 10.18503/1995-2732-2024-22-1-143-155

Abstract

The paper is devoted to processes of selective destruction of brittle materials, in particular rocks, for example, during their beneficiation. It has been shown that the most important aspect in the study on crushing of brittle rocks due to the interaction between crusher actuators and the crushed material is cracking. It has been shown that by applying conventional methods of mechanical crushing, the rock destruction is not selective due to the difference of the structure and physical and mechanical properties of crushed materials, and, therefore, heterogeneous scenarios of forming micro- and macro-crack geometry in the fracture center. Since the majority of production companies are mostly interested in quality control of the fractional composition of finished crushed products, the researchers focus on the solution to providing controlled opening of “defects” in various crushed rocks. For this purpose, the paper demonstrates a new method of the size reduction of brittle materials. When using such method, a complex controlled vibration impact is introduced in the zone of material destruction as forced amplitude-modulated vibrations of the working body of the hammer crusher to increase the geometric bulk homogeneity of the resulting crumbs by simultaneous formation of a branched network of deep and surface cracks. Then the specific example shows how the mentioned complex vibration displacements of the crusher working body are formed and how it is possible to significantly expand the area of crack formation in the crushed material as a result of changing the parameters. Using computer modeling in the LSTC LS-Dyna software complex on the Tornado SUSU supercomputer, the researchers clearly show efficiency of increasing the area of cracking during vibration crushing of rocks in comparison with conventional methods without vibration. Efficiency of the new method is also confirmed by full-scale experiments conducted with an experimental crusher. This approach to cracking control will contribute to achieving quasi-homogeneity of the dispersed product at the same time.

Keywords

modeling, cracking, dispersion, brittle materials, combined vibration drives, homogeneity control

For citation

Sergeev Yu.S., Platov S.I., Guzeev V.I., Sergeev S.V., Puzankov M.S. Computer Modeling of a New Method of Controlled Cracking During Dimensional Crushing of Brittle Materials. Vestnik Magnitogorskogo Gosudarstvennogo Tekhnicheskogo Universiteta im. G.I. Nosova [Vestnik of Nosov Magnitogorsk State Technical University]. 2024, vol. 22, no. 1, pp. 143-155. https://doi.org/10.18503/1995-2732-2024-22-1-143-155

Yury S. Sergeev – PhD (Eng.), Associate Professor, Head of the Department of Electrical Equipment and Automation of Production Processes, South Ural State University, Chelyabinsk, Russia. Email: This email address is being protected from spambots. You need JavaScript enabled to view it.. ORCID 0000-0003-1028-8346

Sergey I. Platov – DrSc (Eng.), Professor, Head of the Department of Machines and Technologies of Forming and Mechanical Engineering, Nosov Magnitogorsk State Technical University, Magnitogorsk, Russia. Email: This email address is being protected from spambots. You need JavaScript enabled to view it.. ORCID 0000-0002-4868-4881

Viktor I. Guzeev – DrSc (Eng.), Professor, Head of the Department of Automated Mechanical Engineering Technologies, South Ural State University, Chelyabinsk, Russia. Email: This email address is being protected from spambots. You need JavaScript enabled to view it.. ORCID 0000-0002-8277-1217

Sergey V. Sergeev – PhD (Eng.), Associate Professor, Professor of the Department of Mechanical Engineering Technology, Machines and Tools, South Ural State University, Chelyabinsk, Russia. Email: This email address is being protected from spambots. You need JavaScript enabled to view it.. ORCID 0000-0001-7868-4295

Maksim S. Puzankov – master’s student, South Ural State University, Chelyabinsk, Russia. Email: This email address is being protected from spambots. You need JavaScript enabled to view it.. ORCID 0009-0002-1886-0976

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Details: Published: 22 March 2024; Last Updated: 22 March 2024; Hits: 209