Optically-responsive liquid crystal elastomer thin film motors in linear/nonlinear optical fields

Thin-Walled Structures, Journal Year: 2024, Volume and Issue: 202, P. 112082 - 112082

Published: June 5, 2024

Language: Английский

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Self-oscillation of cantilevered silicone oil paper sheet system driven by steam

Thin-Walled Structures, Journal Year: 2024, Volume and Issue: 203, P. 112270 - 112270

Published: July 29, 2024

Language: Английский

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Self-galloping of a liquid crystal elastomer catenary cable under a steady temperature field

Thin-Walled Structures, Journal Year: 2024, Volume and Issue: 202, P. 112071 - 112071

Published: May 31, 2024

Language: Английский

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Light-powered self-sustained chaotic motion of a liquid crystal elastomer-based pendulum

Chaos Solitons & Fractals, Journal Year: 2024, Volume and Issue: 184, P. 115027 - 115027

Published: May 25, 2024

Language: Английский

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Self-spinning of liquid crystal elastomer tubes under constant light intensity

Communications in Nonlinear Science and Numerical Simulation, Journal Year: 2024, Volume and Issue: 139, P. 108296 - 108296

Published: Aug. 23, 2024

Language: Английский

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Modeling of a light-fueled self-paddling boat with a liquid crystal elastomer-based motor

Physical review. E, Journal Year: 2024, Volume and Issue: 109(4)

Published: April 29, 2024

Active materials possess unique properties of being able to respond autonomously external stimuli, yet realizing and regulating the motion behavior active machines remains a major challenge. Conventional control approaches, including sensor device control, are both complex difficult implement. In contrast, materials--based self-oscillators offer distinct such as periodic ease regulation. Inspired by paddle boats, we have proposed conceptual light-fueled self-paddling boat with photothermally responsive liquid crystal elastomer (LCE)--based motor that operates under steady illumination incorporates an LCE fiber. Based on well-established dynamic model rotation dynamics, equations for governing LCE-steered derived, driving torque LCE-based paddling velocity formulated successively. The numerical results show two modes illumination: static mode mode. regime arises from competition between frictional torque. Moreover, critical conditions required trigger quantitatively examined well significant system parameters affecting torque, angular velocity, velocity. exhibits benefits customizable size untethered ambient powered, which provides valuable insights into design application micromachines, soft robotics, energy harvesters, beyond.

Language: Английский

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Behavior Prediction and Inverse Design for Self-Rotating Skipping Ropes Based on Random Forest and Neural Network

Mathematics, Journal Year: 2024, Volume and Issue: 12(7), P. 1019 - 1019

Published: March 28, 2024

Self-oscillatory systems have great utility in energy harvesting, engines, and actuators due to their ability convert ambient directly into mechanical work. This characteristic makes design implementation highly valuable. Due the complexity of motion process simultaneous influence multiple parameters, computing self-oscillatory proves be challenging, especially when conducting inverse parameter design. To simplify computational process, a combined approach o0f Random Forest (RF) Backpropagation Neural Network (BPNN) algorithms is employed. The example used self-rotating skipping rope made liquid crystal elastomer (LCE) fiber mass block under illumination. Numerically solving governing equations yields precise solutions for rotation frequency LCE various system parameters. A database containing 138,240 sets conditions corresponding frequencies constructed train RF BPNN models. training outcomes indicate that can accurately predict demonstrating high stability efficiency. allows us discover influences distinct parameters on as well. Moreover, it capable design, meaning derive desired combination from given frequency. Through this study, deeper understanding dynamic behavior achieved, offering new theoretical foundation construction.

Language: Английский

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Self-oscillation of a liquid crystal elastomer string-mass system under constant gradient temperature

Journal of Applied Mechanics, Journal Year: 2024, Volume and Issue: 91(10)

Published: June 14, 2024

Abstract Recent experiments have found that a fiber-mass system can self-oscillate along the vertical direction under non-uniform temperature field, which necessitates significant space. To address challenge in adapting to situations with limited space, current work introduces self-oscillating string-mass system, comprising of mass ball and thermally responsive liquid crystal elastomer string exposed constant gradient temperature. By employing theoretical modeling numerical simulation, we identified two motion regimes namely, static regime self-oscillation regime, elucidated mechanism self-oscillation. Utilizing analytical method, derived expressions for bifurcation point, amplitude, frequency self-oscillation, investigated impact parameters on these aspects, were verified by solutions. Compared has superior stability deal small horizontal disturbances, amplify its amplitude thermal deformation material, saves amount Given attributes, such presents novel possibilities designing energy harvesters, active machinery, soft robots.

Language: Английский

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Mathematical Modeling of the Displacement of a Light-Fuel Self-Moving Automobile with an On-Board Liquid Crystal Elastomer Propulsion Device

Mathematics, Journal Year: 2024, Volume and Issue: 12(9), P. 1322 - 1322

Published: April 26, 2024

The achievement and control of desired motions in active machines often involves precise manipulation artificial muscles a distributed sequential manner, which poses significant challenges. A novel motion strategy based on self-oscillation offers distinctive benefits, such as direct energy harvesting from the ambient environment elimination complex controllers. Drawing inspiration automobiles, self-moving automobile designed for operation under steady illumination is developed, comprising two wheels liquid crystal elastomer fiber. To explore dynamic behavior this illumination, nonlinear theoretical model proposed, integrating with established model. Numerical simulations are conducted using Runge-Kutta method MATLAB software, it observed that undergoes supercritical Hopf bifurcation, transitioning static state to state. sustained periodic facilitated by interplay between light damping dissipation. Furthermore, conditions bifurcation occurs analyzed detail. It worth noting increasing intensity or decreasing rolling resistance coefficient can improve average velocity. innovative design advantages not requiring an independent power source, possessing simple structure, being sustainable. These characteristics make highly promising range applications including actuators, soft robotics, harvesting, more.

Language: Английский

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Multi-modal self-sustained motions of a silicone oil paper disc on a surface driven by hot steam

Chaos Solitons & Fractals, Journal Year: 2024, Volume and Issue: 191, P. 115898 - 115898

Published: Dec. 13, 2024

Language: Английский

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