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Abstract The angle of repose of granular accumulation is a fundamental issue in granulometry, and our current understanding of its influencing factors and variation patterns is still incomplete. Experimental research methods are limited by the existing types of granules and measurement means, making it difficult to comprehensively reveal the influence of individual physical parameters on the angle of repose. The Discrete Element Method (DEM) is a commonly used computer simulation method for studying granular systems, allowing for direct modeling and calculation of the transient behavior of complex large-scale granular systems. In this paper, the DEM method was used to conduct a systematic numerical study on the angle of repose of granular accumulation, exploring the important granular physical parameters that can affect the angle of repose. Simulation results show that both sliding and rolling friction coefficients are positively correlated with the size of the angle of repose. The sliding friction coefficient can double the angle of repose, while the influence of the rolling friction coefficient on the angle of repose has an upper threshold value. Once this threshold is reached, it will no longer increase the size of the angle of repose; the effects of Young's modulus and the coefficient of restitution on the angle of repose are relatively minor.
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Received: 09 October 2023
Published: 04 June 2024
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2024, Vol. 45 
