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

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

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.

• Jezik: Angleški jezik
• Ključne besede: magnetoactive elastomers, magnetorheological elastomers, magnetoresponsive surfaces
• Vrsta gradiva: Članek v reviji
• Tipologija: 1.01 - Izvirni znanstveni članek
• Organizacija: FMF - Fakulteta za matematiko in fiziko
• Različica publikacije: Recenzirani rokopis
• Datum objave: 03.05.2024
• Leto izida: 2024
• Št. strani: 11 str.
• Številčenje: Vol. 33, no. 6, art. no. 067001
• PID: 20.500.12556/RUL-156120
• UDK: 539.2
• ISSN pri članku: 0964-1726
• DOI: 10.1088/1361-665X/ad41a9
• COBISS.SI-ID: 194802691
• Datum objave v RUL: 09.05.2024

Gradivo je del revije

• Naslov: Smart materials and structures
• Skrajšan naslov: Smart mater. struc.
• Založnik: IOP Publishing
• ISSN: 0964-1726
• COBISS.SI-ID: 13497861

Licence

• Licenca: CC BY-NC-ND 4.0, Creative Commons Priznanje avtorstva-Nekomercialno-Brez predelav 4.0 Mednarodna
• Povezava: http://creativecommons.org/licenses/by-nc-nd/4.0/deed.sl
• Opis: Najbolj omejujoča licenca Creative Commons. Uporabniki lahko prenesejo in delijo delo v nekomercialne namene in ga ne smejo uporabiti za nobene druge namene.

Sekundarni jezik

• Jezik: Slovenski jezik
• Ključne besede: magnetoaktivni elastomeri, magnetoreološki elastomeri, magnetno odzivne površine