JRM Vol.36 No.3 pp. 769-778
doi: 10.20965/jrm.2024.p0769


Development and Application of Shape-Memory Polymer and Alloy Composite Sheets

Kazuto Takashima*1 ORCID Icon, Yuta Okamura*1, Junya Nagaishi*2, Hiroki Cho*2, Toshiro Noritsugu*3, and Toshiharu Mukai*4 ORCID Icon

*1Graduate School of Life Science and Systems Engineering, Kyushu Institute of Technology
2-4 Hibikino, Wakamatsu-ku, Kitakyushu 808-0196, Japan

*2Faculty of Environmental Engineering, The University of Kitakyushu
1-1 Hibikino, Wakamatsu-ku, Kitakyushu, Fukuoka 808-0135, Japan

*3Mimasaka University
50 Kitazonocho, Tsuyama, Okayama 708-8511, Japan

*4Department of Information Engineering, Faculty of Information Engineering, Meijo University
1-501 Shiogamaguchi, Tenpaku-ku, Nagoya 468-8502, Japan

December 26, 2023
April 4, 2024
June 20, 2024
shape-memory polymer, shape-memory alloy, pneumatic artificial muscle, variable stiffness, shape recovery

The authors previously developed a flexible and multi-degree-of-freedom pneumatic artificial rubber muscle that uses shape-memory polymer (SMP) sheets with an embedded electrical heating wire. The bending direction and initial shape of the muscle can be changed by utilizing the large difference in the elastic modulus below and above the glass transition temperature, shape fixity, and shape recovery of SMPs. In this study, to improve performance, we propose a shape-memory composite (SMC) sheet that consists of SMP sheets with an embedded shape-memory alloy (SMA) wire used as an electric heating wire. The mechanical properties of the previously developed SMP sheets and the proposed SMC sheets are compared through shape recovery, bending, and tensile tests using prototypes. The motion of the artificial muscle with various samples attached is evaluated through an isometric test and bending angle measurements. The experimental results confirm that the use of the SMA wire improves the production reproducibility and shape recovery of the SMP sheets without degrading other mechanical properties or actuator performance.

Proposed shape-memory composite sheet

Proposed shape-memory composite sheet

Cite this article as:
K. Takashima, Y. Okamura, J. Nagaishi, H. Cho, T. Noritsugu, and T. Mukai, “Development and Application of Shape-Memory Polymer and Alloy Composite Sheets,” J. Robot. Mechatron., Vol.36 No.3, pp. 769-778, 2024.
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Last updated on Jul. 12, 2024