Thermo-mechanical Characterization of Joule Heated Twisted-Coiled Actuators

TL;DR

This paper investigates the thermo-mechanical behavior of twisted-coiled actuators made from conductive yarns, focusing on how different current supplies influence their rate-dependent hysteretic actuation response.

Contribution

It provides a detailed experimental characterization of TCA's thermo-mechanical response, highlighting the effects of current amplitude and rate on actuation behavior.

Findings

Rate-dependent hysteresis observed in actuation response

Significant influence of current rate on thermo-mechanical behavior

Detailed manufacturing and experimental methodology reported

Abstract

In this study, Twisted-Coiled Actuators (TCA) were manufactured by co-coiling a silver coated nylon conductive yarn with a nylon primary mono filament. In the co-coiled TCA, the conductive yarn is used for Joule heating of primary nylon mono filament to provide controlled actuation. A detailed experimental study is conducted to characterize the thermo-mechanical response of TCA, with varying supply of current amplitude and current rates. The results indicates significant rate-dependent hysteritic actuation response to supply current. The details of manufacturing, experiments and results are reported.