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Proceedings Paper

Analysis of the shape-recovery performance of thermally-activated shape-memory polymer composite with microstructural heterogeneities
Author(s): Masaaki Nishikawa; Masaki Hojo
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Paper Abstract

Functional polymer composite is expected to be applied to the potential material for space deployable structures. Especially, thermally-activated shape-memory polymer (SMP) composites are increasingly investigated due to their excellent shape fixity and shape recovery; the thermomechanical properties of these materials greatly change around their glass transition temperature Tg. To enhance the ability of space deployable structures, the microstructural design at the fiber-matrix level in the material is required to pursuit the better performance of SMP composite. The present study focused on a micromechanics consideration of shape-memory polymer (SMP) composite with slits in the fiber mat, and attempted to discuss the effect of microstructural heterogeneities (slit positions) on the shape-fixity and shape-recovery performance. Analysis of the shape-recovery performance of SMP composites was conducted using the micromechanical model based on a viscoelastic thermomechanical constitutive model. According to the numerical results, only when the slits gather at the same location, the best shape-fixity property and shape-recovery performance is achieved, while sacrificing its bending stiffness. This is because the slits act as a hinge in the material under a bending loading.

Paper Details

Date Published: 28 March 2012
PDF: 7 pages
Proc. SPIE 8342, Behavior and Mechanics of Multifunctional Materials and Composites 2012, 834211 (28 March 2012); doi: 10.1117/12.913035
Show Author Affiliations
Masaaki Nishikawa, Kyoto Univ. (Japan)
Masaki Hojo, Kyoto Univ. (Japan)

Published in SPIE Proceedings Vol. 8342:
Behavior and Mechanics of Multifunctional Materials and Composites 2012
Nakhiah C. Goulbourne; Zoubeida Ounaies, Editor(s)

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