SYMPOSIA PAPER Published: 01 January 1992

Integrated Mechanics for the Passive Damping of Polymer-Matrix Composites and Composite Structures


Some recent developments on integrated damping mechanics for unidirectional composites, laminates, and composite structures are reviewed. Simplified damping micromechanics relate the damping of on-axis and off-axis composites to constituent properties, fiber volume ratio, fiber orientation, temperature, and moisture. Laminate and structural damping mechanics for thin composites are summarized. Discrete layer damping mechanics for thick laminates, including the effects of interlaminar shear damping, are developed and semi-analytical predictions of modal damping in thick simply-supported specialty composite plates are presented. Applications demonstrate the advantages of the unified mechanics, and illustrate the effect of fiber volume ratio, fiber orientation, structural geometry, and temperature on the damping. Additional damping predictions for composite plates of various laminations, aspect ratios, fiber content, and temperature illustrate the merits and ranges of applicability of each theory (thin or thick laminates).

Author Information

Saravanos, DA
NASA Lewis Research Center, Cleveland, OH
Chamis, CC
NASA Lewis Research Center, Cleveland, OH
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Developed by Committee: E28
Pages: 471–489
DOI: 10.1520/STP17979S
ISBN-EB: 978-0-8031-5218-2
ISBN-13: 978-0-8031-1495-1