中央加振法による制振CFRP積層はりの減衰特性評価

抄録

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.