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Kinetic bistable flaps actuated with magneto-active elastomers
Pennsylvania State University, Department of Architecture, USA; University of North Carolina at Charlotte, School of Architecture, USA.ORCID-id: 0000-0003-1765-1259
Pennsylvania State University, Department of Architecture, USA; University of North Carolina at Charlotte, School of Architecture, USA.
Pennsylvania State University, Department of Architecture, USA; University of North Carolina at Charlotte, School of Architecture, USA.
2022 (Engelska)Ingår i: Behavior and Mechanics of Multifunctional Materials XVI / [ed] Ryan L. Harne; Mariantonieta Gutierrez Soto; Aimy Wissa, SPIE - International Society for Optical Engineering, 2022, artikel-id 1204401Konferensbidrag, Publicerat paper (Refereegranskat)
Abstract [en]

Bistable laminates present a promising approach for shape-morphing applications due to their large deflections and low input energy required to transition between states. Recently, these engineered materials have been considered for kinetic systems in architecture. One challenge of using large bistable laminates in a building-scale application is finding proper actuation mechanisms. This paper focuses on a case study using Magneto-Active Elastomers (MAEs) as actuators of bistable flaps. More specifically, this study aims to determine adequate bistable and MAE configurations for a kinetic shading device. Our experimental approach evaluates various MAE actuation configurations and their potential to deform a bistable kinetic shading setup. In a first experiment, we identified the appropriate locations and quantities of MAE patches, although the bistable structures could not be actuated outside of the flaps' deflection path. We further determined that 1) the most promising placement is when the MAE patches are perpendicular to the flaps’ longest side, and 2) a maximum of four MAE patches are adequate for non-contact actuation. In a second experiment, we tested smaller bistable sheets and measured the magnetic field strength required to initiate actuation. Actuation outside the deflection path was successful for most sheets, with non-contact actuation achieved at a 60-80 mm distance from the bistable flaps to the magnet. The study also showed that bistable flaps with more significant length to width (L/W) ratios the flaps bounceback, which is problematic for actuation and, therefore, should be avoided. Finally, we discuss the limitations and suggest strategies for increasing the kinetic capabilities of bistable systems applied to kinetic shades, including clamping the edge of bistable flaps and combining non-bistable sections to bistable laminates.

Ort, förlag, år, upplaga, sidor
SPIE - International Society for Optical Engineering, 2022. artikel-id 1204401
Serie
Proceedings of SPIE, ISSN 0277-786X, E-ISSN 1996-756X
Nationell ämneskategori
Arkitekturteknik
Forskningsämne
arkitektur, arkitekturteknik
Identifikatorer
URN: urn:nbn:se:umu:diva-212944DOI: 10.1117/12.2612851ISI: 000836328000003Scopus ID: 2-s2.0-85132177960ISBN: 9781510649637 (tryckt)ISBN: 9781510649644 (digital)OAI: oai:DiVA.org:umu-212944DiVA, id: diva2:1788899
Konferens
SPIE Smart Structures + Nondestructive Evaluation, 2022, Long Beach, California, United States, March 6-10, 2022
Tillgänglig från: 2023-08-17 Skapad: 2023-08-17 Senast uppdaterad: 2023-08-17Bibliografiskt granskad

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Vazquez, Elena

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Totalt: 154 träffar
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