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A Large-Deformation Theory for Thermally-Actuated Shape-Memory Polymers and its Application

[+] Author Affiliations
Shawn A. Chester, Vikas Srivastava, Claudio V. Di Leo, Lallit Anand

Massachusetts Institute of Technology, Cambridge, MA

Paper No. IMECE2010-37383, pp. 677-683; 7 pages
doi:10.1115/IMECE2010-37383
From:
  • ASME 2010 International Mechanical Engineering Congress and Exposition
  • Volume 9: Mechanics of Solids, Structures and Fluids
  • Vancouver, British Columbia, Canada, November 12–18, 2010
  • Conference Sponsors: ASME
  • ISBN: 978-0-7918-4446-5
  • Copyright © 2010 by ASME

abstract

The most common shape-memory polymers are those in which the shape-recovery is thermally-induced. A body made from such a material may be subjected to large deformations at an elevated temperature above its glass transition temperature ϑg . Cooling the deformed body to a temperature below ϑg under active kinematical constraints fixes the deformed shape of the body. The original shape of the body may be recovered if the material is heated back to a temperature above ϑg without the kinematical constraints. This phenomenon is known as the shape-memory effect. If the shape recovery is partially constrained, the material exerts a recovery force and the phenomenon is known as constrained-recovery.

Copyright © 2010 by ASME

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