Abstract
Auxetic (negative Poisson's ratio) configurations have recently been used to build prototypes of deployable structures using classical shape memory alloys (Nickel-Titanium-Copper). Chiral configurations, featuring three or more interconnected spiral-wound hubs, exploit efficient tensile-rotational mechanisms. These structures offer high deployability ratios in structural elements with load-bearing characteristics. Shape memory polymers have the potential to replace these shape memory alloys and other stored-energy actuators, and have the attractive properties of low mass, high actuation strain, easy fabrication and tuneable thermal properties. In this work we discuss how shape memory polymers (SMP) integrated into a chiral core could offer enhanced deployable characteristics and increase the efficiency of the auxetic deformations in these unusual cellular structures. We consider the spiral-wound fundamental component needed for SMP n-chiral prototypes and present test results showing actuation motion of expanding SMP deployable structures. Applications likely to benefit from these structures include lightweight elements for structural engineering applications, deployable structures for space applications and implantable medical devices.
Translated title of the contribution | Design of a deployable structure with shape memory polymers |
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Original language | English |
Title of host publication | BEHAVIOR AND MECHANICS OF MULTIFUNCTIONAL MATERIALS AND COMPOSITES 2012 |
Editors | NC Goulbourne, Z Ounaies |
Place of Publication | BELLINGHAM |
Publisher | Society of Photo-Optical Instrumentation Engineers (SPIE) |
Number of pages | 7 |
ISBN (Print) | 978-0-8194-8999-9 |
DOIs | |
Publication status | Published - 2012 |
Event | Conference on Behavior and Mechanics of Multifunctional Materials and Composites - San Diego, Canada Duration: 12 Mar 2012 → 15 Mar 2012 |
Publication series
Name | Proceedings of SPIE |
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Publisher | SPIE-INT SOC OPTICAL ENGINEERING |
Volume | 8342 |
ISSN (Print) | 0277-786X |
Conference
Conference | Conference on Behavior and Mechanics of Multifunctional Materials and Composites |
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Country/Territory | Canada |
City | San Diego |
Period | 12/03/12 → 15/03/12 |
Bibliographical note
Conference Proceedings/Title of Journal: Proceedings of SPIEConference Organiser: SPIE
Research Groups and Themes
- Tactile Action Perception
Keywords
- shape memory polymers
- hexachiral
- auxetic
- deployable structures
- MEDICAL APPLICATIONS