The propagation of Quasi-static region during granular impact--颗粒学报PARTICUOLOGY

Yang, M., Li, R., Xiu, Y., Zeng, Q., Ye, X., & Yang, H. (2023). The propagation of Quasi-static region during granular impact. Particuology, 83, 1-7. https://doi.org/10.1016/j.partic.2023.02.003

The propagation of Quasi-static region during granular impact

Moyu Yang ^{a 1}, Ran Li ^{a 1}, Yingnan Xiu ^b, Qiang Zeng ^a, Xiaoyan Ye ^b, Hui Yang ^a *

a School of Optical-Electrical and Computer Engineering, University of Shanghai for Science and Technology, Shanghai, 200093, China
b Center for Particle-Laden Turbulence, Key Laboratory of Mechanics on Disaster and Environment in Western China attached to the Ministry of Education of China, Department of Mechanics and Engineering Science, School of Civil Engineering and Mechanics, Lanzhou University, Lanzhou, 730000, China

10.1016/j.partic.2023.02.003

Volume 83, December 2023, Pages 1-7

Received 20 October 2022, Revised 30 December 2022, Accepted 3 February 2023, Available online 17 February 2023, Version of Record 1 March 2023.

E-mail: yanghui@usst.edu.cn

Highlights

• Defined a ring-shaped region with the velocity of zero named Quasi-static Region.

• Quasi-static Region is the boundary of collapse during impact.

• Quasi-static Region has stable propagation characteristics.

• Changes in particle rheological properties occur at Quasi-static Region.

Abstract

In this paper, through experiments and DEM simulations, it is found that there is a ring-shaped region named Quasi-static Region between the particles expanding outward and the particles collapsing inward during the impact process. Quasi-static Region is always generated from the impact point at the same time, and then spreads out at a uniform speed. During the propagation of Quasi-static Region, the velocity of the particles in the particle extend region varies linearly in space and time. And the change rate is only related to the properties of the particle system. The simulation results show that the particle flow in Quasi-static Region is elastic-inertial flow, while the particle flow expanding outward and collapsing inward is inertial flow.

Graphical abstract

Keywords

Impact; Quasi-static region; Propagation; Shear flow

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