On the fluctuation phenomenon of axial thermal stress of a torsional fishing-line artificial muscle (Twisted Polymer Fiber) actuator

Hiroki Iwai; Kentaro Takagi; Chihaya Oiwa; Ken Masuya; Kenji Tahara; Toshihira Irisawa; Masatoshi Shioya; Haruhiko Watanabe; Daichi Sakurai; Kinji Asaka

doi:10.1117/12.2557783

8 May 2020 On the fluctuation phenomenon of axial thermal stress of a torsional fishing-line artificial muscle (Twisted Polymer Fiber) actuator

Hiroki Iwai, Kentaro Takagi, Chihaya Oiwa, Ken Masuya, Kenji Tahara, Toshihira Irisawa, Masatoshi Shioya, Haruhiko Watanabe, Daichi Sakurai, Kinji Asaka

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Proceedings Volume 11375, Electroactive Polymer Actuators and Devices (EAPAD) XXII; 113751H (2020) https://doi.org/10.1117/12.2557783
Event: SPIE Smart Structures + Nondestructive Evaluation, 2020, Online Only

Abstract

Fishing-line artificial muscles can exhibit various motions. Twisted Polymer Fiber (TPF) actuators, which are a class of fishing-line artificial muscle actuators, generate torsional motion by applying heat. In general, untwisted fiber contracts by heating. However, measuring the blocking thermal tensile force of a TPF, we have discovered that the tensile force decreased and fluctuated depending on the initial number of twists in the TPF. This suggests that a TPF expands depending on the initial number of twists. Furthermore, the tensile force does not decrease monotonically but fluctuates during heating.

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Hiroki Iwai, Kentaro Takagi, Chihaya Oiwa, Ken Masuya, Kenji Tahara, Toshihira Irisawa, Masatoshi Shioya, Haruhiko Watanabe, Daichi Sakurai, and Kinji Asaka "On the fluctuation phenomenon of axial thermal stress of a torsional fishing-line artificial muscle (Twisted Polymer Fiber) actuator", Proc. SPIE 11375, Electroactive Polymer Actuators and Devices (EAPAD) XXII, 113751H (8 May 2020); https://doi.org/10.1117/12.2557783

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