Specific damping - composites

[tjakeman]

Hi,

I have recently started some work on free and forced vibration of composite structures. I have found *Modal Dynamic analysis in Abaqus to be the most useful. What I lack is information on the specific damping coefficient for composite structures. Obviously the volume fraction, structure type etc will affect the damping ratio, but does anybody have any general info on sensible numbers to use?

Many thanks

Tom Jakeman

 

[GregLocock]

0.03-0.1 at a rough guess, for a homogenous structure, more if there are bolted joints or so on. There really is no substitute for a hammer test.



Cheers

Greg Locock


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