Hello Mehmet,

It depends what kind of PZT device you have.
I designed a beta version of MATLAB toolbox for designing
thickness mode piezoelectric transducers. Bascially, program is capable of
calculating time and frequency response of the transducer, including of
electrical input impedance, front port displacement, velocity and force
calculations. Transducer can consist of piezoelectric material, electrodes
and matching layers. Since, you are from educational institution I can
provide the program for you. After, I got the copyright release from
Stanford University I may provide the program for industrial users.

I am also working on flextensional mode piezoelectric transducers.
Currently, I am using variational methods and plate equations to calculate
the displacement of a laminated piezoelectric-passive membrane
flextensional transducers.

Hope this help you.

Gokhan Percin

On Thu, 6 Aug 1998, Mehmet Arik wrote:

>
>
>
> I would like to claculate the force on a PZT device. Anybody has any
> suggestion about any correlation or formulation about that.
>
> Thanx..
>
>
>
> Mehmet.
>
> ***************************
>
> University Minnesota
> Thermal Management of Electronic Systems
> Department of Mechanical Engineering
> 111 Church Street, Minneapolis
> MN 55455                   USA
>
> Office: ME458
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>
>           HAVE A GREAT SUMMER
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>
> On Mon, 3 Aug 1998, Mark Sheplak wrote:
>
> > Werner,
> >
> > I can offer you partial help.  The following paper will give you everything
> > that you need for the circular case...
> >
> > Sheplak, M. and Dugundji, J., ``Large Deflections of Clamped Circular Plates
> > Under Tension and Transitions to Membrane Behavior,''  J. Appl. Mech., Vol.
> > 65, No. 1, 107-115, 1998.
> >
> > We developed this model to aid in the design of a piezoresistive microphone.
> > It proved to be very accurate for our application. I hope that this is
> > helpful to you.  If you have any questions please contact me.
> >
> > Regards,
> >
> > Mark
> >
> > **********************************************
> > Mark Sheplak
> > Department of Aerospace Engineering,
> > Mechanics, & Engineering Science
> > 227 Engineering Building
> > PO Box 116250
> > University of Florida
> > Gainesville, FL 32611-6250
> > (352) 392-3983
> > (352) 392-7303 FAX
> > ms@aero.ufl.edu
> > **********************************************
> > -----Original Message-----
> > From: WJ Karl 
> > To: MEMS@ISI.EDU 
> > Date: Saturday, August 01, 1998 8:05 PM
> > Subject: Membrane deflection
> >
> >
> > > Dear colleages,
> > >
> > > I am looking for an analytical solution to calculate the deflection
> > > and the stress/strain behaviour of a clamped circular/square or
> > > rectangular membrane. It seems there is no complete analytical
> > > model for this published (especially in the rectangular case) and
> > > everybody uses FEM instead.
> > >
> > > I am looking for a plug-in solution able to do the following (yes,
> > > I am optimistic ..) :
> > >
> > > + any geometry/aspect ratio (rectangular case) can be calculated
> > > + deflections bigger than membrane thickness are valid
> > > + deflection and strain/stress values as function of position
> > >
> > > Any hint appreciated. Please ... don't just mention Timoshenko.
> > >
> > > Thanks,
> > >
> > > Werner.
> > >  <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
> > > W  J   K  A  R  L
> > > MEMS Unit, U of Sheffield         Home 'sweet Home :
> > > Mappin Street                     Cobden View Rd. 7o
> > > Sheffield S1 3JD, UK              Sheffield S1o 1HQ
> > > +44 (0) 114 222 5182/5890         South Yorks., UK
> > > Fax (0) 114 272 6391              +44 (0) 114 266 2831
> > > elp95wjk@sheffield.ac.uk
> > > >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
> > > What has two legs and three ears ? - A happy Tyson :-)
> > >
> >
> >
> >
>
>
>