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Tunable rebound of millimeter-sized rigid balls by magnetic actuation of elastomer-based surface microstructures

  • A novel method for controlling the rebound behavior of small balls made of Al2O3 with a radius of 2.381 mm is presented. It uses different types of micro-structured surfaces of soft magnetoactive elastomers. These surfaces were fabricated via laser micromachining and include fully ablated surfaces as well as micrometer-sized lamellas with a fixed width of 90 µm, height of 250 µm and three different gap sizes (15, 60 and 105 µm). The lamellas can change their orientation from edge-on to face-on configuration according to the direction of the external magnetic field from a permanent magnet. The orientation of the external magnetic field significantly influences the rebound behavior of the balls, from a coefficient of restitution e of to < 0.1. The highest relative change in the coefficient of restitution between zero field and face-on configuration of is observed for lamellas with a gap of 60 µm. Other characteristics of the ball rebound such as the penetration depth into an Magnetoactive elastomer and the maximum deceleration are investigated as well. The proposed method does not require a constant power supply due to the use of permanent magnets. It may find novel applications in the field of impact engineering.

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Metadaten
Author:Raphael Kriegl, Matija Jezeršek, Gaia Kravanja, Luka Hribar, Soham Mukhi, Gašper Kokot, Irena Drevenšek-Olenik, Mikhail ShamoninORCiDGND
DOI:https://doi.org/10.1088/1361-665X/ad41a9
Parent Title (English):Smart Materials and Structures
Publisher:IOP Science
Document Type:Article
Language:English
Year of first Publication:2024
Release Date:2024/05/27
Volume:33
Issue:6
Article Number:067001
Institutes:Fakultät Elektro- und Informationstechnik
Begutachtungsstatus:peer-reviewed
research focus:Produktion und Systeme
Licence (German):Keine Lizenz - Es gilt das deutsche Urheberrecht: § 53 UrhG
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