Using shape memory alloy as dampers : design methodology
Name
64637180-MIT.pdf
Description
Full printable version
Size
3.39 MB
Format
Adobe PDF
Checksum (MD5)
697d4a20c014bf3b216d46300ca0d86a
Author(s)
Leong, Siu Loong
Advisor(s)
Jerome J. Connor.
Alternative Title
Using SMA as dampers : design methodology
Date Issued
2005
Publisher
Massachusetts Institute of Technology
Abstract
Many shape memory alloy (SMA) material models have been proposed in the literature, but most are suited only to forward analysis and not to design. This project proposes a generalized friction element, the lambda box, to model the stress-strain curve of SMA during pseudoelasticity. Simulation is carried out to study the dynamic response of such a system under harmonic loading. Three kinds of systems were examined, in order of increasing complexity: the friction damper system, the hysteretic damper system, and the hysteretic lambda damper system, which dynamically is equivalent to the SMA damper system. Using the simulation results, various asymptotes on the design space are identified, and design methodologies for the three systems are proposed. As the determination of the system parameters is decoupled from the actual damper design, a design methodology to dimension and configure the SMA damper is then proposed, for two kinds of problems, initial design and retrofit design.
Description
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 2005.
Includes bibliographical references (p. 141-143).
Subjects
Civil and Environmental Engineering.
MIT Department
Massachusetts Institute of Technology. Department of Civil and Environmental Engineering
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