A Lamina-Emergent Frustum Using a Bistable Collapsible Compliant Mechanism | Zendy

Rami Alfattani | Zendy; Craig P. Lusk | Zendy

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A Lamina-Emergent Frustum Using a Bistable Collapsible Compliant Mechanism

Author(s) -

Rami Alfattani,

Craig P. Lusk

Publication year - 2017

Publication title -

journal of mechanical design

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.911

H-Index - 120

eISSN - 1528-9001

pISSN - 1050-0472

DOI - 10.1115/1.4037621

Subject(s) - frustum , bistability , mechanism (biology) , spiral (railway) , compliant mechanism , bar (unit) , morphing , four bar linkage , polygon (computer graphics) , computer science , engineering , hinge , mechanical engineering , structural engineering , engineering drawing , frame (networking) , materials science , computer graphics (images) , physics , finite element method , optoelectronics , quantum mechanics , meteorology

This paper presents a new bistable collapsible compliant mechanism (BCCM) that is utilized in a lamina-emergent frustum. The mechanism is based on transforming a polygon spiral into spatial frustum shape using a mechanism composed of compliant links and joints that exhibits a bistable behavior. A number of mechanism types (graphs) were considered to implement the shape-morphing spiral, including 4-bar, 6-bar, and 8-bar chains. Our design requirements permitted the selection of a particular 8-bar chain as the basis for the BCCM. The bistable behavior was added to the mechanism by introducing a snap-through bistability as the mechanism morphs. A parametric CAD was used to perform the dimensional synthesis. The design was successfully prototyped. We anticipate that the mechanism may be useful in commercial small animal enclosures or as a frame for a solar still.

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