The Proceedings of the Dynamics & Design Conference
Online ISSN : 2424-2993
2019
Session ID : 104
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Identification of damping properties of damped CFRP laminated beams by central oscillation method
*Hiroyuki MOTOYAMAKohji SUZUKI
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Abstract

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.

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© 2019 The Japan Society of Mechanical Engineers
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