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Multimaterial 3D Printed Soft Actuators Powered by Shape Memory Alloy Wires
RISE - Research Institutes of Sweden, Materials and Production, IVF.
Singapore University of Technology and Design, Singapore; University of Exeter, UK.
Singapore University of Technology and Design, Singapore.
Singapore University of Technology and Design, Singapore.
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2019 (English)In: Sensors and Actuators A-Physical, ISSN 0924-4247, E-ISSN 1873-3069, Vol. 290, p. 177-189Article in journal (Refereed) Published
Abstract [en]

Shape memory alloys (SMAs) have been widely used to fabricate soft actuators by embedding SMA wires into various soft matrices manufactured by conventional moulding methods or novel three-dimensional (3D) printing techniques. However, soft matrices of SMA based actuators are typically fabricated from only one or two different materials. Here, we exploit the great manufacturing flexibility of multimaterial 3D printing to fabricate various bending, twisting and extensional actuators by precisely controlling the spatial arrangements of different printing materials with different stiffnesses. In order to achieve a broad range of deformations, ten different printing materials were characterized and used in the actuators design. In addition, we developed a finite element model to simulate complex deformations of the printed actuators and facilitate the design process. The model incorporates a user defined material subroutine that describes the nonlinear temperature dependant behavior of SMAs. The results show the efficiency and flexibility of multimaterial 3D printing in tailoring the deformed shape of the SMA based soft actuators, which cannot be accomplished using conventional manufacturing methods such as moulding.

Place, publisher, year, edition, pages
2019. Vol. 290, p. 177-189
Keywords [en]
3D printing, finite element modeling, shape memory alloy, soft actuator, 3D modeling, Actuators, Deformation, Finite element method, Flexible manufacturing systems, Molding, Shape memory effect, Shape-memory alloy, Wire, 3-D printing, Conventional manufacturing, Manufacturing flexibility, Nonlinear temperature, Shape memory alloy wire, Soft actuators, Spatial arrangements, Three-dimensional (3D) printing, 3D printers
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:ri:diva-38257DOI: 10.1016/j.sna.2019.03.015Scopus ID: 2-s2.0-85063343210OAI: oai:DiVA.org:ri-38257DiVA, id: diva2:1301631
Note

 Funding details: Agency for Science, Technology and Research; Funding details: Pakistan Science Foundation, 1521200086; Funding details: Agency for Science, Technology and Research, STAR; Funding details: National Research Foundation Singapore; Funding details: Office of Naval Research Global; Funding details: National Research Foundation; Funding details: Digital Manufacturing and Design Centre, Singapore University of Technology and Design; Funding details: Singapore University of Technology and Design; Funding text 1: The authors acknowledge support from SUTD Digital Manufacturing and Design Centre (DManD) funded by Singapore National Research Foundation (NRF) . Q. G. acknowledges the support from the Agency for Science, Technology and Research (A*STAR) Public Sector Funding (PSF) (Project number 1521200086), the U.S. Office of Naval Research Global (ONRG) , and the SUTD Start-up Research Grant . Appendix A

Available from: 2019-04-02 Created: 2019-04-02 Last updated: 2019-04-02Bibliographically approved

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