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Proceedings Paper

Reflexive aerostructures: increased vehicle survivability
Author(s): Thomas W. Margraf; Chris D. Hemmelgarn; Thomas J. Barnell; Mark A. Franklin
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Paper Abstract

Aerospace systems stand to benefit significantly from the advancement of reflexive aerostructure technologies for increased vehicle survivability. Cornerstone Research Group Inc. (CRG) is developing lightweight, healable composite systems for use as primary load-bearing aircraft components. The reflexive system is comprised of piezoelectric structural health monitoring systems, localized thermal activation systems, and lightweight, healable composite structures. The reflexive system is designed to mimic the involuntary human response to damage. Upon impact, the structural health monitoring system will identify the location and magnitude of the damage, sending a signal to a discrete thermal activation control system to resistively heat the shape memory polymer (SMP) matrix composite above activation temperature, resulting in localized shape recovery and healing of the damaged areas. CRG has demonstrated SMP composites that can recover 90 percent of flexural yield stress and modulus after postfailure healing. During the development, CRG has overcome issues of discrete activation, structural health monitoring integration, and healable resin systems. This paper will address the challenges associated with development of a reflexive aerostructure, including integration of structural health monitoring, discrete healing, and healable shape memory resin systems.

Paper Details

Date Published: 11 April 2007
PDF: 10 pages
Proc. SPIE 6527, Industrial and Commercial Applications of Smart Structures Technologies 2007, 652708 (11 April 2007); doi: 10.1117/12.715218
Show Author Affiliations
Thomas W. Margraf, Cornerstone Research Group, Inc. (United States)
Chris D. Hemmelgarn, Cornerstone Research Group, Inc. (United States)
Thomas J. Barnell, Cornerstone Research Group, Inc. (United States)
Mark A. Franklin, Franklin Innovation (United States)

Published in SPIE Proceedings Vol. 6527:
Industrial and Commercial Applications of Smart Structures Technologies 2007
L. Porter Davis; B. K. Henderson; M. Brett McMickell, Editor(s)

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