Analysis of the shape-recovery performance of thermally-activated shape-memory polymer composite with microstructural heterogeneities

Masaaki Nishikawa; Masaki Hojo

doi:10.1117/12.913035

28 March 2012 Analysis of the shape-recovery performance of thermally-activated shape-memory polymer composite with microstructural heterogeneities

Masaaki Nishikawa, Masaki Hojo

Author Affiliations +

Proceedings Volume 8342, Behavior and Mechanics of Multifunctional Materials and Composites 2012; 834211 (2012) https://doi.org/10.1117/12.913035
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2012, San Diego, California, United States

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 T_g. 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.

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Masaaki Nishikawa and Masaki Hojo "Analysis of the shape-recovery performance of thermally-activated shape-memory polymer composite with microstructural heterogeneities", Proc. SPIE 8342, Behavior and Mechanics of Multifunctional Materials and Composites 2012, 834211 (28 March 2012); https://doi.org/10.1117/12.913035

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KEYWORDS

Composites

Polymers

Finite element methods

Glasses

Performance modeling

Structured optical fibers

Structural design

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