On the Vibration Properties of Composite Materials and Structures

Abstract

In recent years, there has been a widespread assumption that composite materials and structures offer enhanced vibration and acoustic properties. This assumption has to be evaluated or validated. The objective of this article is to address the subject of vibration characteristics and the related force transmissibility properties of composite structures. For a given composite beam made of Hercules AS4/3501-6 graphite/epoxy with a layered structure sequence of (0,0,30, - 30)₆ _S , resonance frequencies, structural damping, responses, impedances, and force transmissibility properties are determined, discussed, and compared with those of a steel beam. This article proposes a procedure to evaluate the vibration properties of individual composites. The cnterion defined for performance com parison between composite materials and conventional materials is also discussed.

Keywords

composite beams vibrations mechanical impedances force transmis sibilities.

Get full access to this article

View all access options for this article.

References

Vinson, J.R. and R.L. Sierakowski . 1987. The Behavior of Structures Composed of Composite Materials. Martinus Nijhoff Publishers .

Teoh, L.S. and C.C. Huang. 1977. "The Vibration of Beams of Fibre Reinforced Material," Journal of Sound and Vibration, 51:467-473.

Teh, K.K. and C.C. Huang 1979 "The Vibrations of Generally Orthotropic Beams, a Finite Element Approach," Journal of Sound and Vibration , 62:195-206.

Abarcar, R.B. and P.F. Cunniff. 1972. "The Vibration of Cantilevered Beams of Fiber Reinforced Material;' Journal of Composite Materials, 6:504-516.

Crawley, E.F. and J. Dugundji. 1980. "Frequency Determination and Non-Dimensionalization for Composite Cantilever Plates," Journal of Sound and Vibration, 72(1):1-10.

Jensen, D.W. and E.F. Crawley. 1984. "Frequency Determination Techniques for Cantilevered Plates with Bending-Torsion Coupling ," AIAA Journal, 22(3):415-420.

Anon. 1986. The NASTRAN User's Manual, NASA SP-222 (08).