* † ‡ § ∗ † ‡ § 50th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference<br>17th 4 - 7 May 2009, Palm Springs, California AIAA 2009-2545 Copyright © 2009 by the American Institute of Aeronautics and Astronautics, Inc. All rights reserved.