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Proceedings Paper

Modeling fluid structure interaction with shape memory alloy actuated morphing aerostructures
Author(s): Stephen D. Oehler; Darren J. Hartl; Travis L. Turner; Dimitris C. Lagoudas
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Paper Abstract

The development of efficient and accurate analysis techniques for morphing aerostructures incorporating shape memory alloys (SMAs) continues to garner attention. These active materials have a high actuation energy density, making them an ideal replacement for conventional actuation mechanisms in morphing structures. However, SMA components are often exposed to the same highly variable environments experienced by the aeroelastic assemblies into which they are incorporated. This is motivating design engineers to consider modeling fluidstructure interaction for prescribing dynamic, solution-dependent boundary conditions. This work presents a computational study of a particular morphing aerostructure with embedded, thermally actuating SMA ribbons and demonstrates the effective use of fluid-structure interaction modeling. A cosimulation analysis is utilized to determine the surface deflections and stress distributions of an example aerostructure with embedded SMA ribbons using the Abaqus Finite Element Analysis (FEA) software suite, combined with an Abaqus Computational Fluid Dynamics (CFD) processor. The global FEA solver utilizes a robust user-defined material subroutine which contains an accurate three-dimensional SMA constitutive model. Variations in the ambient fluid environment are computed using the CFD solver, and fluid pressure is mapped into surface distributed loads. Results from the analysis are qualitatively validated with independently obtained data from representative flow tests previously conducted on a physical prototype of the same aerostructure.

Paper Details

Date Published: 23 March 2012
PDF: 12 pages
Proc. SPIE 8343, Industrial and Commercial Applications of Smart Structures Technologies 2012, 834305 (23 March 2012); doi: 10.1117/12.918061
Show Author Affiliations
Stephen D. Oehler, Texas A&M Univ. (United States)
Darren J. Hartl, Texas A&M Univ. (United States)
Travis L. Turner, NASA Langley Research Ctr. (United States)
Dimitris C. Lagoudas, Texas A&M Univ. (United States)

Published in SPIE Proceedings Vol. 8343:
Industrial and Commercial Applications of Smart Structures Technologies 2012
Kevin Farinholt; Steven F. Griffin, Editor(s)

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