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List of materials and their damping properties 
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#1
Aug1408, 07:33 AM

P: 20

Hi all,
I've finished a hypothetical problem in which I have determined the optimum damping ratio $\zeta$ for a specific system. This [tex]$\zeta$[/tex] value (0.265 in my case) minimizes the peak force transmitted through an object. My next step is to take this [tex]$\zeta$[/tex] value and find some sort of "realworld" material or product (wood, cork, rubber, commercialofftheshelf damper, etc), that has a [tex]$\zeta$[/tex] value close to this so that I can basically say: "Here's the ideal [tex]$\zeta$[/tex] value, here's how close you can get to that using this material or that material". I'm not sure where I can find a list of common materials and their associated damping ratios, or if such a list even exists in the first place? Any advice? thanks in advance. 


#2
Aug1608, 12:01 PM

P: 4,513

You've got me curious. I take it you have distinct elements: one with mass, one providing a spring constant, and one dampening element in one dimension.
Zeta doesn't seem to be a property of bulk materials, but would depend upon the shape of a solid damping element. In a one dimensional problem, and simple geometry, it would depend upon cross sectional area and length of the element, so seems to have units of D^1 (or D^1). But I'm beginning to think that the idea is to use a liquid, where you obtain zeta dependent upon the viscosity of the fluid. 


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