Study on force chain evolution of rice straw with different length during vibrational compression--颗粒学报PARTICUOLOGY

Tang, H., Xu, W., Zhu, G., Xu, C., & Wang, J. (2024). Study on force chain evolution of rice straw with different length during vibrational compression. Particuology, 85, 310-322. https://doi.org/10.1016/j.partic.2023.07.006

Study on force chain evolution of rice straw with different length during vibrational compression

Han Tang, Wenlong Xu, Guixuan Zhu, Changsu Xu ^*, Jinwu Wang ^*

College of Engineering, Northeast Agricultural University, Harbin, 150030, China

10.1016/j.partic.2023.07.006

Volume 85, February 2024, Pages 310-322

Received 25 April 2023, Revised 29 June 2023, Accepted 6 July 2023, Available online 23 July 2023, Version of Record 3 August 2023.

E-mail: ChangsuXu@neau.edu.cn; jinwuw@neau.edu.cn

Highlights

• Mechanical behavior in particle compression was studied by discrete element method.

• Evolution mechanism of straw force chains under vibration compression was studied.

• Straw densification under vibration compression was studied.

• The effect of straw length on force chain transfer during compression was studied.

• The study helps to improve the efficiency of agricultural waste utilization.

Abstract

This paper explores the mechanism of force chain evolution and voidage change under vibrational and non-vibrational compression conditions of rice straw of different lengths. Simulations were used to explore the force chain evolution and voidage variation mechanism under different conditions. The results show that under non-vibrational compression, the strong force chain passes from top to bottom in vertical direction and from center to periphery in tangential direction. Under vibrational compression, the force chain passes from top and bottom to center in vertical direction and the force chain evolves from outer ring to interior and exterior in tangential direction. The number of strong chains, voidage and standard deviation of the mean pressure under vibratory compression are lower than the values under non-vibratory compression. Vibration promotes stress transfer and enhancement, velocity enhancement and density enhancement. This study analyzes the mechanical properties of different lengths straw during vibrational and non-vibrational compression from a detailed viewpoint.

Graphical abstract

Keywords

Straw compression; Voidage; Discrete element method; Mechanical properties; Force chain transmission

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