20.500.12556/RUL-156120 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 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. magnetoactive elastomers magnetorheological elastomers magnetoresponsive surfaces magnetoaktivni elastomeri magnetoreološki elastomeri magnetno odzivne površine true false true Angleški jezik Slovenski jezik Članek v reviji 2024-05-09 11:38:48 2024-05-09 11:38:49 2025-04-21 10:49:57 0000-00-00 00:00:00 2024 0 0 11 str. no. 6, art. no. 067001 Vol. 33 May 2024 0000-00-00 PostprintKoncna Objavljeno NiDoloceno 0000-00-00 0000-00-00 2024-05-03 2025-05-03 539.2 0964-1726 10.1088/1361-665X/ad41a9 194802691 Tunable_mechanical_characteristics_of_microstructured_magnetoactive_elastomers_and_their_effect_on_rebound_characteristics_rev2.pdf Tunable_mechanical_characteristics_of_microstructured_magnetoactive_elastomers_and_their_effect_on_rebound_characteristics_rev2.pdf 1 D5F418F204DF91CB1A25E387DC59C087 56e25a30cfe395e3b01f8463b947ba29dc2635e66f86e4b99cd1fdf763459663 54f432df-0de9-11ef-b552-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=183399 Fakulteta za matematiko in fiziko 0 0 0