Self-Sustained Vibration of Optically Responsive Liquid Crystal Elastomer Cantilever Beams

ZHAO Jun; SUN Xiaodie; ZHAO Xiaomin; YAN Zhiquan

doi:10.21656/1000-0887.450108

Volume 46 Issue 6

Jun. 2025

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Article Navigation > Applied Mathematics and Mechanics > 2025 > 46(6): 755-763

ZHAO Jun, SUN Xiaodie, ZHAO Xiaomin, YAN Zhiquan. Self-Sustained Vibration of Optically Responsive Liquid Crystal Elastomer Cantilever Beams[J]. Applied Mathematics and Mechanics, 2025, 46(6): 755-763. doi: 10.21656/1000-0887.450108

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Self-Sustained Vibration of Optically Responsive Liquid Crystal Elastomer Cantilever Beams

doi: 10.21656/1000-0887.450108

1. College of Civil Engineering, Anhui Jianzhu University, Hefei 230601, P.R.China;
2. China Railway Nineteenth Bureau Group Sixth Engineering Company Limited, Wuxi, Jiangsu 214000, P.R.China;
3. Guangzhou Metro Construction Management Company Limited, Guangzhou 510000, P.R.China

Funds:

The National Science Foundation of China(12172001)

Received Date: 2024-04-19
Rev Recd Date: 2025-02-14

Available Online: 2025-06-30

Abstract

Abstract

The light-driven self-sustained bending vibration phenomenon of liquid crystal elastomer (LCE) cantilever beams was investigated, and the dynamics model for light-driven vibration was established, with the semi-analytical formula obtained with the method of vibration shape superposition, and the dynamic response laws calculated by the MATLAB software programming. The results show that, the periodic self-sustained vibration responses of the LCE cantilever beam can be realized under the action of constant light, which theoretically and reasonably explains previous experimental phenomena. Furthermore, the bending vibration amplitude of the LCE beam can be controlled through adjustment of the light intensity, the damping coefficient and the thermal relaxation time, and the beam vibration frequency mainly depends on the thermal relaxation time. This work is of significance in the engineering fields of remote light-driven actuators, sensors, soft micro-robots and light energy conversion systems.
- liquid crystal elastomer,
- self-sustained vibration,
- cantilever beam,
- light-driven

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References(27)

References

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