A thin composite plate which is made of fibreglass should have a loss factor around 0.05. But you will never know the actual value unless you test it in the laboratory.
Does anyone measured the loss factor of fibreglass plates?
Dear Aygün,
You may examine the following papers for the loss factors of laminated thin fibreglass composite plates.
Article A modal impedance technique for mid and high frequency analy...
Article Determinations of in-situ energy loss factors of point-conne...
Best regards...
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