At 14:55 -0500 9/14/2000, Nickolay Lavrik wrote: >Does anyone know the equation (or the reference where it can be found) >that can be used to estimate a spring constant of a thin plate (such as >microcantilever) based on the plate geometry (thickness, width, length) >and Young's modulus of the material ? Find a college freshman text on "statics." It's gonna be in there. My books are all buried in my move from Minneapolis to Dallas, so I con't find it myself. If your engineering school has a mechanical engineering department, they should have a text book. If worse comes to worst, and introductory materials science (mechanical properties of materials) may list the same information. It's a fairly intuitive formula with a constant for correction to actual values. At worst, it will involve a moment of inertia for non-recantular shapes. David -- David Drinkwater 3530 Bloomington Ave. S. #3 Minneapolis, MN 55407 Phone: 612.724.6359 drink003@tc.umn.edu http://www.demodave.com