School Seminars and Colloquia

The dynamic response of cantilever beams vibrating in fluid at arbitrary mode number

Completion Seminar

by Anthony van Eysden

Institution: University of Melbourne
Date: Fri 27th April 2012
Time: 11:00 AM
Location: Richard Berry Building - Russell Love Theatre

Abstract: Micro-cantilever beams form an integral component of
technologies such as the Atomic Force Microscope (AFM) and
microelectromechanical devices (MEMS). In many biological and medical
applications, the AFM and MEMS are immersed in the natural liquid
environment of the sample, which can strongly effect the dynamic
response of the cantilever. In this talk we present theoretical models
for calculating the fluid-structure interaction between a vibrating
cantilever beam and its surrounding fluid. In particular, we focus on
higher order bending modes of the cantilever, which are commonly probed
in practice. This extends previous models, which were formulated
primarily for the fundamental mode and the next few harmonics, to the
general case of arbitrary mode order by accounting for the
three-dimensional nature of the flow field around the cantilever beam.
The dynamic response of cantilever beams executing flexural and
torsional oscillations of arbitrary mode number in incompressible and
compressible fluids is discussed.