Raphael Kriegl (Author), Matija Jezeršek (Author), Gaia Kravanja (Author), Luka Hribar (Author), Soham M. Mukhi (Author), Gašper Kokot (Author), Irena Drevenšek Olenik (Author), Mikhail Shamonin (Author)

Abstract

A novel method for controlling the rebound behavior of small balls made of Al$_2$O$_3$ 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 $\approx 0.5$ to < 0.1. The highest relative change in the coefficient of restitution between zero field and face-on configuration of $\approx 80 \%$ 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.

Keywords

magnetoaktivni elastomeri;magnetoreološki elastomeri;magnetno odzivne površine;magnetoactive elastomers;magnetorheological elastomers;magnetoresponsive surfaces;

Data

Language: English
Year of publishing:
Typology: 1.01 - Original Scientific Article
Organization: UL FMF - Faculty of Mathematics and Physics
UDC: 539.2
COBISS: 194802691 Link will open in a new window
ISSN: 0964-1726
Views: 598
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Other data

Secondary language: Slovenian
Secondary keywords: magnetoaktivni elastomeri;magnetoreološki elastomeri;magnetno odzivne površine;
Type (COBISS): Article
Embargo end date (OpenAIRE): 2025-05-03
Pages: 11 str.
Volume: ǂVol. ǂ33
Issue: ǂno. ǂ6, art. no. 067001
Chronology: May 2024
DOI: 10.1088/1361-665X/ad41a9
ID: 23643041