Integrated Damping Mechanics for Thick Composite Laminates and Plates

[+] Author and Article Information
D. A. Saravanos

Ohio Aerospace Institute, NASA Lewis Research Center, 21000 Brookpart, MS 49-8, Cleveland, OH, 44135

J. Appl. Mech 61(2), 375-383 (Jun 01, 1994) (9 pages) doi:10.1115/1.2901454 History: Received October 29, 1991; Revised November 17, 1992; Online March 31, 2008


A method for predicting the damped dynamic characteristics of thick composite laminates and plates is presented. Unified damping mechanics relate the damping of composite plates to constituent properties, fiber volume ratio, fiber orientation, laminate configuration, plate geometry, temperature, and moisture. Discrete layer damping mechanics for thick laminates, entailing piecewise continuous displacement fields and including the effects of interlaminar shear damping, are described. A semi-analytical method for predicting the modal damping and natural frequencies of thick simply-supported specialty composite plates is included. Applications demonstrate the validity, merit, and ranges of applicability of the new theory. The applications further illustrate the significance of interlaminar shear damping, and investigate the effects of lamination, thickness aspect ratio, fiber content, and temperature.

Copyright © 1994 by The American Society of Mechanical Engineers
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