NASA Goddard Space Flight Center

Tin Whisker Contact Against Uralane


Tin Whisker

Reference from “Theory of Elasticity” 2nd edition by Timoshenko & Goodier

Where D = Depth
nu = Poisson’s ratio for uralane = 0.5
Eu = Young’s modulus for uralane = 1.4 MPa
d = diameter of whisker
FB = buckling force
I = Inertia
L = length of the whisker

Displacement of the surface,
Buckling Force,


Suppose the whisker is pushed against the Uralane. What is the penetration depth before the tin whisker buckles?

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Responsible NASA Officials:

   Michael Sampson/NASA GSFC Code 306
   Dr. Henning Leidecker/NASA GSFC Code 562
Additional Researchers: 

   Jong Kadesch/Orbital Sciences Corp.
   Jay Brusse/QSS Group, Inc.

Last Updated:

April 20, 2005

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