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Measurement and Prediction of the Thermomechanical Response of Shape Memory Alloy Hybrid Composite BeamsPrevious work at NASA Langley Research Center (LaRC) involved fabrication and testing of composite beams with embedded, pre-strained shape memory alloy (SMA) ribbons within the beam structures. That study also provided comparison of experimental results with numerical predictions from a research code making use of a new thermoelastic model for shape memory alloy hybrid composite (SMAHC) structures. The previous work showed qualitative validation of the numerical model. However, deficiencies in the experimental-numerical correlation were noted and hypotheses for the discrepancies were given for further investigation. The goal of this work is to refine the experimental measurement and numerical modeling approaches in order to better understand the discrepancies, improve the correlation between prediction and measurement, and provide rigorous quantitative validation of the numerical analysis/design tool. The experimental investigation is refined by a more thorough test procedure and incorporation of higher fidelity measurements such as infrared thermography and projection moire interferometry. The numerical results are produced by a recently commercialized version of the constitutive model as implemented in ABAQUS and are refined by incorporation of additional measured parameters such as geometric imperfection. Thermal buckling, post-buckling, and random responses to thermal and inertial (base acceleration) loads are studied. The results demonstrate the effectiveness of SMAHC structures in controlling static and dynamic responses by adaptive stiffening. Excellent agreement is achieved between the predicted and measured results of the static and dynamic thermomechanical response, thereby providing quantitative validation of the numerical tool.
Document ID
20050160203
Acquisition Source
Langley Research Center
Document Type
Preprint (Draft being sent to journal)
Authors
Davis, Brian
(North Carolina State Univ. Raleigh, NC, United States)
Turner, Travis L.
(NASA Langley Research Center Hampton, VA, United States)
Seelecke, Stefan
(North Carolina State Univ. Raleigh, NC, United States)
Date Acquired
August 23, 2013
Publication Date
January 1, 2005
Subject Category
Metals And Metallic Materials
Report/Patent Number
SPIE-5757-74
Meeting Information
Meeting: SPIE International Symposium on Smart Structures and Materials/NDE
Location: San Diego, CA
Country: United States
Start Date: March 6, 2005
End Date: March 10, 2005
Sponsors: International Society for Optical Engineering
Funding Number(s)
OTHER: 23-762-55-MO
Distribution Limits
Public
Copyright
Public Use Permitted.
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