Dynamic trapping in bi-stable electrostatically actuated curved micro beams

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Micro and nano devices incorporating bi-stable structural elements such as micro beams are designed to exploit the fact that the latter possess two stable configurations at the same actuation force. Generally, the transition of a micro beam from one table state to another, namely the snap-through which is essentially dynamic phenomenon, can be initiated by either static or dynamic activations. In this work, results of theoretical and numerical investigations of the transient dynamics of a pre-stressed initially curved double clamped micro beams actuated by a time dependent electrostatic load are presented. We show by means of a reduced order model of a shallow beam, derived using the Galerkin procedure, that the beam may exhibit various types of responses. For certain beam characteristics, the second stable state is inaccessible under a static loading but is attainable only by means of a specially tailored dynamic actuation. This gives way to the possibility of trapping the dynamically bi-stable beam at a stable configuration which is close to the electrode by applying special loading sequences.

Original languageEnglish
Title of host publication19th Design for Manufacturing and the Life Cycle Conference; 8th International Conference on Micro- andNanosystems
PublisherAmerican Society of Mechanical Engineers (ASME)
ISBN (Electronic)9780791846353
DOIs
StatePublished - 2014
EventASME 2014 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference, IDETC/CIE 2014 - Buffalo, United States
Duration: 17 Aug 201420 Aug 2014

Publication series

NameProceedings of the ASME Design Engineering Technical Conference
Volume4

Conference

ConferenceASME 2014 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference, IDETC/CIE 2014
Country/TerritoryUnited States
CityBuffalo
Period17/08/1420/08/14

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