The propagation of Quasi-static region during granular impact

Yang, Moyu; Li, Ran; Xiu, Yingnan; Zeng, Q.; Ye, Xiaoyan; Yang, Hui

doi:10.1016/j.partic.2023.02.003

Cited by 5 publications

(1 citation statement)

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“…The simulation results showed that the energy COR method was more accurate than the kinematic COR method, and the effects of impact velocity and impact angle on the high-energy COR were also studied. The COR is used in the analysis of many DEM models [24][25][26][27][28][29][30][31][32] that simulate particle flow. Li et al [33] studied the influence of surface roughness on the COR through an impact experiment between particles and walls with different levels of roughness, and the results showed that the COR decreased with the increase in surface roughness.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Coefficient of Restitution of Small-Sized Spherical Particles during Low-Speed Impact

Li,

Chi

et al. 2024

Condensed Matter

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This study presents experimental investigations on the normal restitution coefficients of a titanium bead (Ti), zirconia bead (ZrO2), and amorphous zirconium alloy sphere (Amor). The research explores the influence of particle diameter and collision velocity on the normal restitution coefficient between two independent, identical spherical particles of different materials. The experimental findings demonstrate that increasing the particle diameter results in more effective plastic deformation, leading to higher energy losses and, subsequently, smaller coefficients of restitution. Similarly, higher particle velocities cause more energy dissipation during collisions, resulting in smaller restitution coefficients. Comparing particles of different materials, those with larger yield strengths exhibit more elastic behavior, experience less initial energy loss due to deformation, and reach the maximum restitution coefficient (elastic state) with fewer collisions. This finding suggests that material properties significantly influence the overall energy dissipation and elastic response in the particles. To validate the experimental results, existing models are compared and discussed. Furthermore, potential physical mechanisms responsible for the observed behavior are explored, providing valuable insights into the collision dynamics in spherical particle interactions. Overall, this study contributes to a better understanding of the factors affecting the normal restitution coefficient in particle collisions, enabling the design and optimization of particle systems for diverse applications in condensed matter and related fields.

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