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Proceedings Paper

Structural and performance predictions for an active composite panel
Author(s): Virginia G. DeGiorgi; S. H. McDermott
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Paper Abstract

Successful use of smart materials or derives requires an understanding of the performance characteristics of the combination of smart and passive components. Synergistic material and geometric interactions often produce complex performance characteristics. Computational simulations which explicitly include material components are often required for accurate performance predictions. A performance evaluation is completed for a multilayered composite panel designed for acoustic suppression. The panel contains multiple pistons. Each piston consists of an array of actuators which support an alumina head mass plate. The alumina plate is designed to deliver uniform displacement with movement of the actuators. The panel design features a graphite composite box which functions as both a base plate for the active panel and as housing for the power electronics required for plate activation. ABAQUS, a commercial finite element code, is used for deformation and structural integrity analyses. Performance issues addressed are: (1)Final surface displacement and flatness of the top surface. (2) Loss of actuator authority resulting from intermediate layers of passive materials. (3) Changes in performance due to changes in interfacial layer characteristics. (4) Changes in performance due to changes in operating temperatures. (5) Internal stress and strain levels in each of the component materials.

Paper Details

Date Published: 23 May 1997
PDF: 11 pages
Proc. SPIE 3044, Smart Structures and Materials 1997: Industrial and Commercial Applications of Smart Structures Technologies, (23 May 1997); doi: 10.1117/12.274661
Show Author Affiliations
Virginia G. DeGiorgi, Naval Research Lab. (United States)
S. H. McDermott, George Washington Univ. (United States)


Published in SPIE Proceedings Vol. 3044:
Smart Structures and Materials 1997: Industrial and Commercial Applications of Smart Structures Technologies
Janet M. Sater, Editor(s)

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