Strain analysis of ionic polymer-metal composite cantilever actuator using DIC method

Hongguang Liu; Wenjie Qian; Lei Chen; Jianguo Zhu

doi:10.1117/12.2326960

24 July 2018 Strain analysis of ionic polymer-metal composite cantilever actuator using DIC method

Hongguang Liu, Wenjie Qian, Lei Chen, Jianguo Zhu

Proceedings Volume 10827, Sixth International Conference on Optical and Photonic Engineering (icOPEN 2018); 1082703 (2018) https://doi.org/10.1117/12.2326960
Event: Sixth International Conference on Optical and Photonic Engineering (icOPEN 2018), 2018, Shanghai, China

Abstract

Ionic polymer–metal composite (IPMC) cantilever actuator demonstrates significant bending deformation upon application of excitation voltage across electrodes without external load. In the present work, the non-contact digital image correlation (DIC) and a digital microscope were used to investigate the micro-scale displacement and strain distributions on the cross section of the actuator under excitation voltages, according to the low mass and film properties of IPMC material. The target surface of the fabricated IPMC sample with Pt electrodes was roughened with fine sandpapers to prepare an appropriate speckled surface. The experimental results indicate that longitudinal normal strain is linearly distributed along the thickness direction and strain gradient of longitudinal normal strain varies linearly with electric field. The longitudinal and transverse normal strains decrease with the increase of the frequency of the excitation voltage. Moreover, due to water loss of the sample in air, the IPMC actuator demonstrates contractive deformation when exposed in the air. The micro scale DIC technique has been proved to have excellent accuracy over a large range of strains, thus is very powerful for mechanical analysis of IPMC materials.

Citation Download Citation

Hongguang Liu, Wenjie Qian, Lei Chen, and Jianguo Zhu "Strain analysis of ionic polymer-metal composite cantilever actuator using DIC method", Proc. SPIE 10827, Sixth International Conference on Optical and Photonic Engineering (icOPEN 2018), 1082703 (24 July 2018); https://doi.org/10.1117/12.2326960

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KEYWORDS

Digital image correlation

Actuators

Electrodes

Polymers

Composites

Polymeric actuators

Microscopes

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