Studies on the Shape Frozen/Recovery Behaviors of SMP-based Sandwich Structure
Authors:
- 18 July 2011
- journal article
- research article
- Published by SAGE Publications in Journal of Intelligent Material Systems and Structures
- Vol. 22 (14) , 1605-1612
Abstract
Shape memory polymers (SMPs) are polymers that can change between temporary and permanent shapes via a programmed thermo-mechanical cycle. However, the stiffness and shape recovery stress of SMPs are much low as compared with shape memory alloys and ceramics. This article aims to improve their stiffness and shape recovery stress by utilization of sandwich structures. Two types of SMP-based sandwich beams, aluminum/SM-polyurethane/aluminum, and steel/SM-polyurethane/steel were considered. Theoretical solutions were proposed in describing the shape frozen/recovery behaviors, which include mechanical loading at an above temperature, frozen fixture by decreasing the temperature to be lower than Tg, and shape recovery through reheating the temperature to be higher than Tg. The results confirm that SMP-based sandwich structure can significantly improve the shape recovery stress and meanwhile realize an acceptable shape fixture rate.Keywords
This publication has 23 references indexed in Scilit:
- Microbuckling Solution of Elastic Memory Laminates under BendingJournal of Intelligent Material Systems and Structures, 2009
- Thermomechanics of shape memory polymers: Uniaxial experiments and constitutive modelingInternational Journal of Plasticity, 2006
- Dependency of the shape memory properties of a polyurethane upon thermomechanical cyclic conditionsPolymer International, 2004
- Shape-Memory Polymers for Microelectromechanical SystemsJournal of Microelectromechanical Systems, 2004
- On the effects of moisture in a polyurethane shape memory polymerSmart Materials and Structures, 2003
- Biodegradable, Elastic Shape-Memory Polymers for Potential Biomedical ApplicationsScience, 2002
- Shape Fixity and Shape Recovery in a Film of Shape Memory Polymer of Polyurethane SeriesJournal of Intelligent Material Systems and Structures, 1998
- Investigation of Shape Memory Polymers and Their Hybrid CompositesJournal of Intelligent Material Systems and Structures, 1997
- Free Vibrations Of Sandwich Beams With A Transversely Flexible Core: A High Order ApproachJournal of Sound and Vibration, 1994
- Kinetics of non-isothermal crystallizationPolymer, 1971