Bi-Directional Origami-Inspired SMA Folding Microactuator

dc.contributor.authorSeigner, Lena
dc.contributor.authorTshikwand, Georgino Kaleng
dc.contributor.authorWendler, Frank
dc.contributor.authorKohl, Manfred
dc.date.accessioned2021-09-13
dc.date.available2023-10-16T19:11:56Z
dc.date.created2021
dc.date.issued2021-09-13
dc.description.abstractWe 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°.en
dc.identifier.citationActuators 10.8 (2021): 181. <https://www.mdpi.com/2076-0825/10/8/181>
dc.identifier.doihttps://doi.org/10.3390/act10080181
dc.identifier.issn2076-0825
dc.identifier.opus-id17178
dc.identifier.urihttps://open.fau.de/handle/openfau/17178
dc.identifier.urnurn:nbn:de:bvb:29-opus4-171784
dc.language.isoen
dc.publisherMDPI
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/deed.de
dc.subjectself-folding origami
dc.subjectmicroactuation
dc.subjectshape memory alloy foils
dc.subjectmicro technology
dc.subject.ddcDDC Classification::6 Technik, Medizin, angewandte Wissenschaften :: 62 Ingenieurwissenschaften :: 620 Ingenieurwissenschaften und zugeordnete Tätigkeiten
dc.titleBi-Directional Origami-Inspired SMA Folding Microactuatoren
dc.typearticle
dcterms.publisherFriedrich-Alexander-Universität Erlangen-Nürnberg (FAU)
local.date.prevpublished2021-08-03
local.document.articlenumber181
local.journal.issue8
local.journal.titleActuators
local.journal.volume10
local.sendToDnbfree*
local.subject.fakultaetTechnische Fakultät
local.subject.importimport
local.subject.sammlungUniversität Erlangen-Nürnberg / Eingespielte Open Access Artikel / Eingespielte Open Access Artikel 2021
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