Modeling the dynamic response of a light-driven liquid crystal elastomer fiber/baffle/spring coupled system

Journal of Applied Mechanics, Journal Year: 2024, Volume and Issue: 91(12)

Published: Aug. 29, 2024

Abstract A self-oscillating system can harness energy from the external environment to sustain its continuous motion, making it highly suitable for applications in soft robotics, military industry, energy, and other fields. This article introduces a composed of light-responsive liquid crystal elastomer fiber, baffle, spring, capable achieving self-oscillation under stable lighting conditions. Considering established dynamic model elastomers (LCEs), nonlinear is introduced used as basis exploring characteristics. Numerical computations reveal that coupled exhibits two distinct motion states: static states. The behavior sustained through interaction light damping dissipation. Furthermore, detailed investigation conducted on key parameters affecting frequency amplitude self-oscillation. In contrast complexity current systems, this particular features simplicity structure, ease manufacture, strong adaptability. These advantages are expected provide broader design possibilities micro-machines mechanical production processes.

Language: Английский

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Self-sustained chaotic movement of electrothermal responsive liquid crystal elastomer pendulum

Mechanics of Advanced Materials and Structures, Journal Year: 2024, Volume and Issue: unknown, P. 1 - 17

Published: Nov. 11, 2024

Self-sustained movement has the ability to absorb energy from external environment maintain its own movement. In present work, a self-sustained chaotic simple pendulum system featuring an electrothermal responsive liquid crystal elastomers fiber and mass ball is proposed examined. The power-on state achieved in through infusion of metal into this fiber. Which enables shrink, feeding compensate for dissipation resulting damping, thus allowing On basis existing dynamic elastomer model, governing equations are established, behavior under stimulation theoretically explored. Numerical findings suggest that presents three different patterns, namely stationary pattern, oscillatory pattern. Moreover, five parameters elastic coefficient, viscosity gravitational acceleration, shrinkage coefficient strength work can contribute better understanding systems driven by materials offer guidance further exploration applications such as chaos machine, mind-brain analysis.

Language: Английский

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Light-Powered Self-Translation of an Asymmetric Friction Slider Using a Liquid Crystal Elastomer String Oscillator

Polymers, Journal Year: 2024, Volume and Issue: 16(24), P. 3520 - 3520

Published: Dec. 18, 2024

In recent years, there have been many studies focused on improving the performance of active materials; however, applying these materials to machines still presents significant challenges. this study, we introduce a light-powered self-translation system for an asymmetric friction slider using liquid crystal elastomer (LCE) string oscillator. The was composed hollow slide, two LCE fibers, and mass ball. Through evolution photothermal-induced contraction, derived governing equations system. Numerical simulations revealed distinct motion modes: static mode mode. As ball moved, fibers alternated between illuminated non-illuminated states, allowing them effectively harvest light energy compensate dissipation within Unlike traditional self-oscillating systems that oscillate around fixed position, enabled advance continuously through oscillator’s symmetric self-sustained oscillation. Furthermore, explored critical conditions necessary initiating as well key parameters influence frequency amplitude oscillator average speed slider. This system, with its simple design ease control, holds promising potential applications in various fields including soft robotics, harvesting, machinery.

Language: Английский

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A Self-Oscillator Based on Liquid Crystal Elastomer Fiber Under Constant Voltage

Polymers, Journal Year: 2024, Volume and Issue: 16(22), P. 3192 - 3192

Published: Nov. 17, 2024

Self-oscillation is the phenomenon in which a system generates spontaneous, consistent periodic motion response to steady external stimulus, making it highly suitable for applications soft robotics, motors, and mechatronic devices. In this paper, we present self-oscillator based on liquid crystal elastomer (LCE) fiber under constant voltage. The primarily consists of an LCE-liquid metal (LCE-LM) composite fiber, mass sphere, straight rod featuring both conductive insulating segments. Building upon established dynamic LCE model, derive governing equations. Numerical calculations reveal two distinct regimes: static regime self-oscillation regime. Furthermore, provide temporal behavior curves electrothermal-induced contraction tensile force, phase trajectories variation equivalent driving force damping force. These detailed studies elucidate that results from electrothermal-responsive LCE-LM when circuit activated, with continuous being sustained through interplay between sphere self-controlled circuit. We also investigate threshold conditions necessary initiating self-oscillation, as well key parameters influence its frequency amplitude. Our demonstrates improved stability by reducing effects gravity other disturbances. Additionally, curved trajectory can be achieved replacing one, resulting more flexible easily controllable structure. Given these characteristics, may ideal creating monitoring warning devices, systems, integrating actuators controllers.

Language: Английский

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