Measurement of strain distribution of dielectric elastomer actuator with plural pairs of electrodes via the image correlation method

T. Hayashi; M. Okui; Y. Yonehara; T. Nakamura

doi:10.1117/12.2514194

13 March 2019 Measurement of strain distribution of dielectric elastomer actuator with plural pairs of electrodes via the image correlation method

T. Hayashi, M. Okui, Y. Yonehara, T. Nakamura

Author Affiliations +

Proceedings Volume 10966, Electroactive Polymer Actuators and Devices (EAPAD) XXI; 109661A (2019) https://doi.org/10.1117/12.2514194
Event: SPIE Smart Structures + Nondestructive Evaluation, 2019, Denver, Colorado, United States

Abstract

A dielectric elastomer actuator (DEA) is a soft actuator with low manufacturing cost and high energy efficiency. The structure of a DEA consists of a dielectric material interlayered with elastic electrodes, and DEA expands when an electric field is applied. The degree of freedom of movement of the DEA can be increased by devising the electrode arrangement in DEA. The performance of DEA is determined by permittivity, Young's modulus, and applicable electric field. Material properties including hysteresis loss are also important when a DEA is used as a sensor or high precision actuator. Generally, silicon and acrylic rubbers are used as the dielectric layer. This study focused on the use of a slidering material (SRM) as a more suitable dielectric for DEA than silicone and acrylic rubbers in terms of its dielectric constant and hysteresis loss. In a previous study, a DEA was developed using SRM as a dielectric, and the image correlation method (ICM) was applied to measure the strain distributions in a two-dimensional plane and the basic characteristics of DEA with one pair of electrodes. Here, the strain distribution was measured when the electrodes of the DEA were segmented into several pairs as the next step in the investigation of its basic characteristics. Patterns of electrode arrangements and the amount of DEA prestretching were changed, and strain distribution was measured using ICM.

Conference Presentation

Citation Download Citation

T. Hayashi, M. Okui, Y. Yonehara, and T. Nakamura "Measurement of strain distribution of dielectric elastomer actuator with plural pairs of electrodes via the image correlation method", Proc. SPIE 10966, Electroactive Polymer Actuators and Devices (EAPAD) XXI, 109661A (13 March 2019); https://doi.org/10.1117/12.2514194

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