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Proceedings Paper

Integrally damped composites: a study on fabrication, dynamics, and statics effects
Author(s): James A. Harvey; James L. Koury; Thomas D. Kim; Michael L. Drake
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Paper Abstract

This paper presents work completed in the area of integrally damped composites. The objective of the project was to evaluate the effectiveness of integrated damping layers in composites, to identify the effect of the damping layer on the strength of the composite, and to define fabrication problems associated with integrating the damping layer into the composite. The study addressed two types of composite panels which included flat panels and filament wound rectangular isogrid panels fabricated from IM-7 graphite fiber and ICI Fiberite 977-2 epoxy resin. With each of the selected fiber orientations, one panel was fabricated with a 0.002 inch layer of damping material as the center layer of the composite; while a second panel, a control panel, did not have the damping layer installed. The test specimens were cured in an autoclave at 350 degree(s)F. All of the composite panels were tested dynamically to determine the dynamic stiffness and modal damping as a function of temperature. Tensile, flexure, and compression tests also were run on the panels at room temperature. The paper presents the details of the fabrication and curing procedures used in the construction of the composite panels and the detailed results of the static and dynamic tests on the damped and undamped panels.

Paper Details

Date Published: 8 September 1993
PDF: 12 pages
Proc. SPIE 1917, Smart Structures and Materials 1993: Smart Structures and Intelligent Systems, (8 September 1993); doi: 10.1117/12.152750
Show Author Affiliations
James A. Harvey, Univ. of Dayton Research Institute (United States)
James L. Koury, Air Force Phillips Lab. (United States)
Thomas D. Kim, Air Force Phillips Lab. (United States)
Michael L. Drake, Univ. of Dayton (United States)

Published in SPIE Proceedings Vol. 1917:
Smart Structures and Materials 1993: Smart Structures and Intelligent Systems
Nesbitt W. Hagood; Gareth J. Knowles, Editor(s)

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