On Fri, 16 Jan 2004, Arti Tibrewala wrote:

> Dear All, I have a membrane 24 microns thick, 3mm*3mm square. I used
> profilometer to get the deflection on it by applying 40mN force. I got a
> deflection of 40,000microns. I guess its huge and hence maybe its wrong. I
> want to calculate therotically the deflcetion of the membrane. I tried to
> get formula but unfortunately all are for pressure. Do anyone know a formula
> to calculate deflection when force is applied? If yes please let me know.
> Thanks,
> Arti
>
40,000 microns? That's 40 millimeters! I seriously doubt your profilometer
can possibly make a measurement that large. Maybe it's 40,000 nm or
Angstroms that you measured. Check your numbers again.

Jesse Fowler
  UCLA/MAE Dept., 420 Westwood Plaza, Room 37-129, ENGR IV
  Los Angeles, CA 90095-1597 | (310)825-3977
"Facts are stubborn, but statistics are more pliable."
   -- Mark Twain