Damping mechanics for predicting the damped dynamic characteristics in specialty composite structures with compliant interlaminar damping layers are presented. Finite-element based mechanics incorporating a discrete layer (or layer-wise) laminate damping theory are utilized to represent general laminate configurations in terms of lay-up and fiber orientation angles, cross-sectional thickness, shape and boundary conditions. Evaluations of the method with exact solutions and experimental data illustrate its accuracy. Additional parametric studies demonstrate the unique capability of angle-ply composite laminates with cocured interlaminar damping layers to significantly enhance structural damping.

1.
Adams
R. D.
, and
Bacon
D. G. C.
,
1973
, “
Effect of Fibre Orientation and Laminate Geometry on the Dynamic Properties of CFRP
,”
Journal of Composite Materials
, Vol.
7
, pp.
402
428
.
2.
Barbero
E. J.
,
Reddy
J. N.
, and
Teply
J.
,
1990
, “
An Accurate Determination of Stresses in Thick Composite Laminates Using a Generalized Plate Theory
,”
Int. Journal for Numerical Methods in Engineering
, Vol.
29
, pp.
1
14
.
3.
Barrett
D. J.
,
1992
, “
An Anisotropic Laminated Damped Plate Theory
,”
Journal of Sound and Vibration
, Vol.
154
, No.
3
, pp.
453
465
.
4.
Bronowicki, A. J., and Diaz, H. P., 1989, “Analysis, Optimization, Fabrication and Test of Composite Shells with Embedded Viscoelastic Layers,” Proceedings of Damping ’89, Wright-Paterson AFB, OH, Report WRDC-TR-89-3116-Vol-l, Sec. GC, paper GCA.
5.
Chen, G. S., and Wada, B. K., 1988, “Passive Damping for Space Truss Structures,” 29th Structures, Structural Dynamics and Materials Conference, 29th, Pt. 3, AIAA, pp. 1742–1749.
6.
Christensen, R. M., 1971, Theory of Viscoelasticity: An Introduction, Academic Press Inc., New York.
7.
Mantena, R. P., Gibson, R. F., and Shwilong, H. J., 1989, “Optimal Constrained Viscoelastic Tape Lengths for Maximizing Damping in Laminated Composites,” Proceedings of Damping ’89, Wright-Paterson AFB, OH, Report WRDC-TR-89-3116-Vol-l, Sec. IA, paper IAB.
8.
Murthy, P. L. N., and Chamis, C. C., 1984, “ICAN: Integrated Composite Analyzer,” AIAA Paper 84-0974.
9.
Pereira, J. M., 1992, “Dynamic Response of Composite Plates with Inter-laminar Damping Layers,” Proceedings, Symposium on Vibroacoustic Characterization of Materials and Structures, ASME Winter Annual Meeting, Anaheim, CA, Nov. 8–13.
10.
Rao, V. S., Sun, C. T., and Sankar, B. V., 1989, “Damping and Vibration Control of Some Laminated Composite Beams Using Add-On Viscoelastic Materials,” Proceedings of Damping ’89, Wright-Paterson AFB, OH, Report WRDC-TR-89-3116-Vol-2, Sec. VA, paper VAA.
11.
Saravanos
D. A.
, and
Chamis
C. C.
,
1990
a, “
Unified Micromechanics of Damping for Unidirectional Fiber Composites
,”
Journal of Composites Technology and Research
, Vol.
12
, No.
1
, pp.
31
40
.
This content is only available via PDF.
You do not currently have access to this content.