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Investigation of the internal stress effects on static and dynamic characteristics of an electrostatically actuated beam for MEMS and NEMS application

DSpace at IIT Bombay

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Title Investigation of the internal stress effects on static and dynamic characteristics of an electrostatically actuated beam for MEMS and NEMS application
 
Creator BHUSHAN, A
INAMDAR, MM
PAWASKAR, DN
 
Subject MECHANICAL-BEHAVIOR
RESIDUAL-STRESS
PULL-IN
RESONATORS
MICROBEAM
SWITCHES
 
Description Internal stress is often encountered in fixed-fixed beam based devices with micron or sub-micron length scales during device fabrication or operation. In this paper, we have investigated the effects of internal stress on static and dynamic characteristics of an electrostatically actuated cylindrical beam. The beam has been modelled using Euler-Bernoulli theory including the nonlinearities due to beam stretching and electrostatic forcing. The analysis has been carried out by solving the governing differential equations using a Galerkin based multi-modal reduced order modelling technique. A standard collocation based numerical scheme has also been used to confirm the results of the reduced order method. Our study shows that internal stress significantly influences the static and dynamic characteristics of the beam. We also find that, when compressive internal stress is high, it is important to include higher modes in the reduced order model. A design technique to achieve high resonant frequency stability under temperature variation, for electrostatically actuated beam oscillators, has also been proposed as a result of this investigation.
 
Publisher SPRINGER
 
Date 2012-06-26T05:18:22Z
2012-06-26T05:18:22Z
2011
 
Type Article
 
Identifier MICROSYSTEM TECHNOLOGIES-MICRO-AND NANOSYSTEMS-INFORMATION STORAGE AND PROCESSING SYSTEMS,17(12)1779-1789
0946-7076
http://dx.doi.org/10.1007/s00542-011-1367-y
http://dspace.library.iitb.ac.in/jspui/handle/100/13949
 
Language English