[1] Zhang Hui, Dai Min, Zhang Zhisheng, Xia Zhijie, et al. Analytical models for circular and spherical dielectric elastomers [J]. Journal of Southeast University (English Edition), 2019, 35 (3): 288-291. [doi:10.3969/j.issn.1003-7985.2019.03.003]
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Analytical models for circular and spherical dielectric elastomers(
)
圆形和球形结构介电弹性体的解析模型
)Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]
- Volumn:
- 35
- Issue:
- 2019 3
- Page:
- 288-291
- Research Field:
- Mechanical Engineering
- Publishing date:
- 2019-09-30
Info
- Title:
- Analytical models for circular and spherical dielectric elastomers
- 圆形和球形结构介电弹性体的解析模型
- Author(s):
- Zhang Hui; Dai Min; Zhang Zhisheng; Xia Zhijie
- School of Mechanical Engineering, Southeast University, Nanjing 211189, China
- Keywords:
- dielectric elastomer; circular frame; balloon actuator; large deformation; phase transition
- PACS:
- TH134
- DOI:
- 10.3969/j.issn.1003-7985.2019.03.003
- Abstract:
- In order to imitate skin characteristics, a dielectric elastomer(DE)membrane coated with flexible electrodes is applied with high voltage, which can lead to wrinkles and other phenomena. To develop soft-actuated air vehicles and other equipment, lightweight gas is pumped into a DE spherical shell to generate controllable flight movements. According to experimental phenomena and data, the calculation models of phase transitions on circular DE films are built. Meanwhile, the deformation characteristics of different DE(acrylic polymer and rubber)spherical actuators combined with helium are compared. The peak pressure inside a rubber balloon is greater than that of a VHB(acrylic polymer)balloon shell, but the limit stretch of rubber is much smaller. By taking advantages of this phenomenon, large deformations of a VHB spherical shell can be realized at an actuated state. Moreover, multi-layer spherical DE shells can achieve larger voltage-induced volume change than monolayer ones. The research indicates that pre-stretching is one of the key factors to induce phase transitions between flat, wrinkled and bulging regions on circular DE films, and the internal pressure determines the electromechanical performance of balloon actuators.
- 为了模仿皮肤特征, 对涂有柔性电极的介电弹性体(DE)膜施加高电压, 使其产生纹理褶皱等现象.为了开发软驱动飞行器等设备, 往DE球壳内部充入质轻气体, 使其产生可控的飞行运动.依据实验现象与数据, 建立了圆形DE薄膜相变转换的计算模型;同时, 比较了不同的DE(丙烯酸聚合物和乳胶)球体驱动器与氦气相结合的变形特征.乳胶气球内部的压力峰值远大于VHB(丙烯酸聚合物)球体的压力峰值, 但是其极限拉伸却较小, 利用这一现象, 能够实现VHB球壳在驱动状态下的大变形.另外, 多层DE球形壳在电压作用下, 能够实现比单层球壳更大的体积变化.研究表明:预拉伸是引起圆形DE膜平坦、皱褶和膨胀区域之间相变转换的关键因素之一;内部压强决定着球体驱动器的机电性能.
References:
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Memo
- Memo:
-
Biographies: Zhang Hui(1987—), female, doctor, assistant researcher; Zhang Zhisheng(corresponding author), male, doctor, professor, oldbc@seu.edu.cn.
Foundation item: The National Natural Science Foundation of China(No.51775108).
Citation: Zhang Hui, Dai Min, Zhang Zhisheng, et al.Analytical models for circular and spherical dielectric elastomers[J].Journal of Southeast University(English Edition), 2019, 35(3):288-291.DOI:10.3969/j.issn.1003-7985.2019.03.003.