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Proceedings Paper

Optimization of adaptive intraply hybrid fiber composites with reliability considerations
Author(s): Michael C. Shiao; Christos C. Chamis
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Paper Abstract

The reliability with bounded distribution parameters (mean, standard deviation, etc.) is maximized and the reliability-based cost is minimized for adaptive intraply hybrid fiber composites using a probabilistic method. The probabilistic method accounts for all naturally occurring uncertainties including those in constituent material properties, fabrication variables, structure geometry and control related parameters. Probabilistic sensitivity factors are computed and used in optimization procedures. The reliability for actuated change in the angle of attack of an airfoil-type composite shell structure with an adaptive torque plate is maximized to 0.9999 probability with constraints on mean and standard deviation of control volume ratio (percentage of actuation composite material in a ply) and control strain coefficient. The reliability-based cost for an airfoil-type composite shell structure with adaptive skin is minimized with mean control volume ratio as the design parameter. It is found that at 0.91 mean control volume ratio, the balance between maximum reliability and minimum cost is achieved.

Paper Details

Date Published: 6 May 1994
PDF: 11 pages
Proc. SPIE 2190, Smart Structures and Materials 1994: Smart Structures and Intelligent Systems, (6 May 1994); doi: 10.1117/12.175210
Show Author Affiliations
Michael C. Shiao, NYMA Inc. (United States)
Christos C. Chamis, NASA Lewis Research Ctr. (United States)


Published in SPIE Proceedings Vol. 2190:
Smart Structures and Materials 1994: Smart Structures and Intelligent Systems
Nesbitt W. Hagood, Editor(s)

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