Shape memory alloy based morphing for underwater vehicles

Authors
Angilella, Alexander J.
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Other Contributors
Gandhi, Farhan
Miller, Timothy F
Koratkar, Nikhil A. A.
Borca-Tasçiuc, Theodorian
Issue Date
2018-08
Keywords
Aeronautical engineering
Degree
PhD
Terms of Use
This electronic version is a licensed copy owned by Rensselaer Polytechnic Institute, Troy, NY. Copyright of original work retained by author.
Full Citation
Abstract
A shape memory alloy-based buoyancy engine is proposed in part one of this dissertation. The structural design of this concept was analyzed and a benchtop prototype was produced. Experimental testing of the prototype's displacement-temperature behavior agreed well with simulation predictions. The vertical dynamics of a scaled-up protoype in oceanic operation were also investigated. A coupled dynamic and heat-transfer simulation showed operation of the buoyancy engine to 770m. The fatigue life was estimated from the strain of the alloys and shown to effectively eliminate the constraint of the buoyancy engine on endurance. A semi-active system was proposed and the simulation indicated that the semi-active system would enable surfacing of the glider. Cu-Zn-Al shape memory alloys were identified for oceanic operation.
Description
August 2018
School of Engineering
Department
Dept. of Mechanical, Aerospace, and Nuclear Engineering
Publisher
Rensselaer Polytechnic Institute, Troy, NY
Relationships
Rensselaer Theses and Dissertations Online Collection
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