Interest in shape memory alloys (SMAs) as lightweight actuators has motivated research into finding optimal morphing structure designs to replace conventional mechanisms in aerospace control systems. Prior to the development of robust constitutive modeling tools for these alloys, application design was based on trial-and-error studies conducted using an array of physical prototypes. Using this approach, a significant amount of time and materials were expended to produce each trial design. However, constitutive models now exist, implemented within a finite element analysis (FEA) framework, that can accurately and consistently predict the thermomechanical response of SMAs. This study considers the use of ModelCenter, a tool for automating simulation processes, coupled with the Abaqus FEA suite and a constitutive model to iteratively converge upon optimal designs in an automated fashion. The engineering design problem posed involves determining the configuration of a morphing aerostructure assembly with attached SMA flexures. Design inputs include material properties and component geometries. The objective is minimization of a cost function that quantifies the deviation of the computed actuation deflection from some target deflection. This paper presents a method for constructing this optimization problem, outlines the modeling tools used to execute each analysis, and highlights the results from the optimal design solution.
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ASME 2011 Conference on Smart Materials, Adaptive Structures and Intelligent Systems
September 18–21, 2011
Scottsdale, Arizona, USA
Conference Sponsors:
- Aerospace Division
ISBN:
978-0-7918-5471-6
PROCEEDINGS PAPER
Design Optimization of a Shape Memory Alloy Actuated Morphing Aerostructure
Stephen Oehler,
Stephen Oehler
Texas A&M University, College Station, TX
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Darren Hartl,
Darren Hartl
Texas A&M University, College Station, TX
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Dimitris Lagoudas,
Dimitris Lagoudas
Texas A&M University, College Station, TX
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Richard Malak
Richard Malak
Texas A&M University, College Station, TX
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Stephen Oehler
Texas A&M University, College Station, TX
Darren Hartl
Texas A&M University, College Station, TX
Dimitris Lagoudas
Texas A&M University, College Station, TX
Richard Malak
Texas A&M University, College Station, TX
Paper No:
SMASIS2011-5068, pp. 421-429; 9 pages
Published Online:
February 7, 2012
Citation
Oehler, S, Hartl, D, Lagoudas, D, & Malak, R. "Design Optimization of a Shape Memory Alloy Actuated Morphing Aerostructure." Proceedings of the ASME 2011 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. ASME 2011 Conference on Smart Materials, Adaptive Structures and Intelligent Systems, Volume 1. Scottsdale, Arizona, USA. September 18–21, 2011. pp. 421-429. ASME. https://doi.org/10.1115/SMASIS2011-5068
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