A class of active polymers that respond mechanically to ultraviolet and visible light is studied using an advanced fluid-structural interaction model that photomechanically couples three dimensional, unsteady Navier-Stokes equations with a plate model of liquid crystal networks. These materials have been shown to exhibit fast response times that scale with the resonant frequency of the polymer film structure. Moreover, these films are classified as glassy (modulus ∼ 1GPa) and thus have demonstrated flapping behavior on the order of 100Hz or greater in millimeter length films. A variety of applications include micro-propulsion systems for insect size aircraft and biomedical actuators for micro-manipulation of biological materials. A critical challenge in utilizing these materials is explored here by quantifying photomechanical performance and efficiency under unsteady, aerodynamic loads. To quantify the active material performance, we utilize detailed fluid-structural computational methods that couple light input energy, strain energy of the photomechanical film, and interactions with ambient air. The effect of ambient air pressure is found to have a significant impact on photomechanical performance.
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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:
978-0-7918-5472-3
PROCEEDINGS PAPER
Fluid Structural Interactions of Flapping Photomechanical Liquid Crystal Polymer Networks
Jonghoon Bin,
Jonghoon Bin
Florida State University, Tallahassee, FL
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M. Yousuff Hussaini,
M. Yousuff Hussaini
Florida State University, Tallahassee, FL
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William S. Oates
William S. Oates
Florida A&M/Florida State University, Tallahassee, FL
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Jonghoon Bin
Florida State University, Tallahassee, FL
M. Yousuff Hussaini
Florida State University, Tallahassee, FL
William S. Oates
Florida A&M/Florida State University, Tallahassee, FL
Paper No:
SMASIS2011-5063, pp. 231-239; 9 pages
Published Online:
February 7, 2012
Citation
Bin, J, Hussaini, MY, & Oates, WS. "Fluid Structural Interactions of Flapping Photomechanical Liquid Crystal Polymer Networks." 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 2. Scottsdale, Arizona, USA. September 18–21, 2011. pp. 231-239. ASME. https://doi.org/10.1115/SMASIS2011-5063
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