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Tunable evolutions of shock absorption and energy partitioning in magnetic granular chains

Dingxin Leng

http://orcid.org/0000-0002-8861-2137

Department of Mechanical and Electrical Engineering, Ocean University of China, Qingdao, Shandong, P. R. China

E-mail Address: lengdingxin@126.com

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Guijie Liu

Department of Mechanical and Electrical Engineering, Ocean University of China, Qingdao, Shandong, P. R. China

E-mail Address: liuguijie@ouc.edu.cn

Corresponding author.

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, and

Lingyu Sun

School of Transportation Science and Engineering, Beihang University, Beijing, P. R. China

E-mail Address: lysun@buaa.edu.cn

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https://doi.org/10.1142/S0217979218500017Cited by:0 (Source: Crossref)

Abstract

In this paper, we investigate the tunable characteristics of shock waves propagating in one-dimensional magnetic granular chains at various chain lengths and magnetic flux densities. According to the Hertz contact theory and Maxwell principle, a discrete element model with coupling elastic and field-induced interaction potentials of adjacent magnetic grains is proposed. We also present hard-sphere approximation analysis to describe the energy partitioning features of magnetic granular chains. The results demonstrate that, for a fixed magnetic field strength, when the chain length is greater than two times of the wave width of the solitary wave, the chain length has little effect on the output energy of the system; for a fixed chain length, the shock absorption and energy partitioning features of magnetic granular chains are remarkably influenced by varying magnetic flux densities. This study implies that the magnetic granular chain is potential to construct adaptive shock absorption components for impulse mitigation.

Keywords:

PACS: 05.45.Yv, 62.30.+d

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