Bi-directional origami-inspired sma folding microactuator
Seigner L, Tshikwand GK, Wendler F, Kohl M (2021)
Publication Type: Journal article
Publication year: 2021
Journal
Book Volume: 10
Article Number: 181
Journal Issue: 8
DOI: 10.3390/act10080181
Abstract
We present the design, fabrication, and characterization of single and antagonistic SMA microactuators allowing for uni-and bi-directional self-folding of origami-inspired devices, respectively. Test devices consist of two triangular tiles that are interconnected by double-beam-shaped SMA microactuators fabricated from thin SMA foils of 20 µm thickness with memory shapes set to a 180° folding angle. Bi-directional self-folding is achieved by combining two counteracting SMA microactuators. We present a macromodel to describe the engineering stress–strain characteristics of the SMA foil and to perform FEM simulations on the characteristics of self-folding and the corresponding local evolution of phase transformation. Experiments on single-SMA microactuators demonstrate the uni-directional self-folding and tunability of bending angles up to 180°. The finite element simulations qualitatively describe the main features of the observed torque-folding angle characteristics and provide further insights into the angular dependence of the local profiles of the stress and martensite phase fraction. The first antagonistic SMA microactuators reveal bi-directional self-folding in the range of −44° to +40°, which remains well below the predicted limit of ±100°.
Authors with CRIS profile
Georgino Kaleng Tshikwand
Graduiertenzentrum der FAU
Frank Wendler
Lehrstuhl für Werkstoffsimulation
Involved external institutions
Germany (DE)How to cite
APA:
Seigner, L., Tshikwand, G.K., Wendler, F., & Kohl, M. (2021). Bi-directional origami-inspired sma folding microactuator. Actuators, 10(8). https://doi.org/10.3390/act10080181
MLA:
Seigner, Lena, et al. "Bi-directional origami-inspired sma folding microactuator." Actuators 10.8 (2021).
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