Abstract
The effect of inter-particle friction on the macroscopic and microscopic mechanical behaviors of powder particle pressing system is an important research topic to improve the density of particle assembly. However, due to the discreteness and complexity of particle system, this problem has not been fully understood. In this study, a numerical model of triaxial powder particle pressing system was established by the DEM method, and the influence of inter-particle friction on the mechanical behavior of particle assembly was comprehensively investigated from the macroscopic and microscopic perspectives. The simulation results show that the friction between particles has a significant effect on the macroscopic mechanical properties of this powder particle pressing system, such as stress-strain response, dilatancy behavior and peak strength. In addition, the evolution of microscopic parameters such as coordination number, microstructure, sliding rate and force chain of this powder particle pressing system is also markedly influenced by the friction between particles. This research work also reveals how the friction between particles affects the movement of particles and the rearrangement of the system. At the same time, it can provide basic theoretical guidance for effectively improving the density of powder metallurgy pressed blanks.
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Acknowledgments
This work was supported by the National Natural Science Foundation of China (52175397 and 51605150). This work was also partly supported by the Henan Provincial Key Teacher Training Program (2019GGJS265), the Scientific and Technological Research Projects in Henan Province (212102210432), and the Key Scientific Research Projects of Henan Universities (21A110007 and 21A130001).
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Huabo Liu received a doctorate in engineering mechanics from China University of Mining and Technology (Beijing). Now he works in the mechanics teaching and research section of Henan Institute of Technology. His research interests include solid mechanics and powder metallurgy.
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Liu, H., Hua, S., Cheng, P. et al. Mechanical mechanism investigation on the influence of inter-particle friction in the triaxial powder pressing system. J Mech Sci Technol 38, 735–747 (2024). https://doi.org/10.1007/s12206-024-0123-z
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DOI: https://doi.org/10.1007/s12206-024-0123-z