Page 190 - Mechanics of Microelectromechanical Systems
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3. Microsuspensions 177
radii and for the particular parameters given here. It can be noticed that
that decreases quasi-linearly with and increasing.
Figure 3.44 Stiffness as a function of and
Example 3.18
A thin spiral spring has to be designed within a circular area of radius R.
Find the rectangular cross-section of the spring with a given thickness-to-
width ratio and a given ratio of the maximum-to-minimum radii that would
produce the best compliance in torsion for a given material. Consider that
and E = 150 GPa.
Solution:
Figure 3.45 Stiffness ratio
The following relationships:
