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snap-through instability

Johannes T.B. Overvelde's picture

Amplifying the response of soft actuators by harnessing snap-through instabilities

Engineering actuators with capabilities that match and even exceed those found in nature, is a long-standing challenge. While traditional actuators are built with hard materials, it has been recently shown that elastomeric materials enable the design of fluidic actuators that are lightweight, inexpensive, easy to fabricate, and able to undergo large deformation and complex motions. However, these actuators typically rely on large volumes for their actuation.

Stephan Rudykh's picture

Snap-through actuation of thick-wall electroactive balloons


Snap-through actuation of thick-wall electroactive balloons

Stephan Rudykh (a), (c), Kaushik Bhattacharya  (c) and Gal deBotton (a), (b)

(a) Department of Mechanical Engineering, Ben-Gurion University, 84105 Beer-Sheva, Israel

kaushik das's picture

Symmetry breaking, snap-through, and pull-in instabilities under dynamic loading of microelectromechanical shallow arches

Arch-shaped microelectromechanical systems (MEMS) have been used as mechanical memories, micro-relays, micro-valves, optical switches, and digital micro-mirrors. A bi-stable structure, such as an arch, is characterized by a multivalued load deflection curve.

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