Vibration damping

[kwklein]

I did a quick serach but wasn't able to find the answers I was looking for.

For vibration damping, would a hollow CF tube perform better than other materials (say aluminium)? What about other types of weave like kevlar/cf vs 100% cf? Is there a chart or a source that has done some testing to the damping capabilities of basic composite materials?

This is related to motorcycle handle bars. They have rubber isolation donuts for the mounting bolts, bar weaights at the end of the grips all to help reduce vibrations. If none of these dampers being used and the bars are mounted/clamped directly whould CF hollow tubes be one of the better approaches to reducing vibrations being transmitted to the rider?

I hope this is clear enough...

 

[MechanicalChef]

The problem with vibrations is you never really know what you need for a more complex part until you actually test it. Depending on where you are on the frequency-response plot will determine what will happen when you introduce vibrations to the handlebars. Theoretically, by choosing CFRP over aluminum, you'd gain stiffness, lose mass, and gain a greater damping coefficient (due to the polymer matrix).

But I'm not an NVH guy, so I really can't help make a prediction of the results.