Host: The Japan Society of Mechanical Engineers
Name : Dynamics and Design Conference 2019
Date : August 27, 2019 - August 30, 2019
In this study, damping properties of normal and damped CFRP laminated beams with 0 deg. and 90 deg. orientation angles were experimentally evaluated by using central oscillation method under 1 atm and vacuum conditions. It is observed that all the damped CFRP laminates had higher loss factors as compared to those without damping interlayer at their center interfaces. Comparisons of the results under 1 atm and vacuum conditions showed that structural damping by atmosphere had quite large affects on the measured loss factors, indicating that the precise measurements of loss factors should be conducted under the vacuum condition.