Design of two-way reversible bending actuator based on a shape memory alloy/shape memory polymer composite
Open accessAbstract
The design of a reversible bending actuator based on a SMA/SMP composite is presented. The SMA/SMP composite is made of SMA NiTi wires with a bent 'U'-shape in the austenite phase embedded in an epoxy SMP matrix which has a memorized flat shape. The bending motion is caused by heating the composite above T Af to activate the NiTi recovery. Upon cooling, the softening from the austenite to R-phase transformation results in a relaxation of the composite towards its original flat shape. In the three-point bending measurement the composite was able to exhibit a reversible deflection of 1.3 mm on a support with a 10 mm span. In addition, a material model for predicting the composite's deflection is presented and predicts the experimental results reasonably well. The model also estimates the in-plane internal force and the degree of the SMA phase transformation.
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Laminated polymers with double SMP layers exhibit two-way SME also under stress-free condition.
“This strategy has also allowed for the development of laminated polymers with double SMP layers exhibiting two-way SME also under stress-free condition [154-156].”
From Two-Way and Multiple-Way Shape Memory Polymers for Soft Robotics: An Overview (2020) · cites this paper as [156]
Section 3 (page unavailable) models a three-layer laminate with two outer SMP layers, and the Conclusion (page unavailable) reports repeatable two-way bending. The active center layer contains SMA wires, however, so the paper does not establish two-way shape memory in a polymer-only laminate. The cited passages also do not establish the claimed stress-free condition. (LLM, conf=0.82)
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Multiple and two-way reversible shape memory polymers: Design strategies and applications
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- Authors
- Taya, M., Liang, Y., Namli, O. C., Tamagawa, H., & Howie, T.
- Affiliations
- University of Washington (US)
- Gifu University (JP)
- Corresponding author
- Taya, Minoru
- Venue
- Smart Materials and Structures
- Publisher
- IOP Publishing
- Published
- 2013-08-29
- Volume
- 22
- Issue
- 10
- Pages
- 105003
- ISSN
- 0964-1726 (ISSN-L)
- 1361-665X
- OpenAlex
- W2045965184
- Cited by
- 45
- References
- 37
- Citations by year
- 2026: 1 · 2025: 3 · 2024: 3 · 2023: 4 · 2022: 13 · 2021: 3 · 2020: 4 · 2019: 4 · 2018: 3 · 2017: 2 · 2016: 1 · 2015: 2 · 2014: 2
- FWCI
- 0.75
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Licence
- Locations
- Smart Materials and Structures (publishedVersion)
- Funders
- University of Washington
- Air Force Office of Scientific Research
- Topics
- Physical Sciences › Materials Science › Materials Chemistry › Shape Memory Alloy Transformations
- Physical Sciences › Engineering › Mechanical Engineering › Advanced Materials and Mechanics
- Physical Sciences › Engineering › Biomedical Engineering › Dielectric materials and actuators
- Keywords
- shape memory alloys, shape memory polymers, NiTi wire, epoxy matrix, austenite-martensite transformation, R-phase transformation, three-point bending
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