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Coupled nonlinear oscillation and stability evolution of viscoelastic dielectric elastomers
Junshi Zhang1, Hualing Chen, Bo Li
1State Key Laboratory for Strength and Vibration of Mechanical Structures, Xi'an Jiaotong University, Xi'an, 710049, China. hlchen@mail.xjtu.edu.cn.
Soft Matter
|August 20, 2015
Summary
This study models viscoelastic dielectric elastomers under tensile forces, revealing how varying forces tune nonlinear oscillations and stability. Dynamic creep can be eliminated by adjusting tensile forces.
Area of Science:
- Materials Science
- Mechanical Engineering
- Nonlinear Dynamics
Background:
- Viscoelastic dielectric elastomers (DEs) are advanced materials with tunable properties.
- Understanding their dynamic behavior under complex loading is crucial for applications.
Purpose of the Study:
- To develop an analytical model for coupled nonlinear oscillation and stability of DEs.
- To investigate the influence of non-equibiaxial tensile forces on DE dynamic behavior.
Main Methods:
- Utilized the method of virtual work to develop an analytical model.
- Employed numerically calculated results to predict nonlinear dynamic behavior.
- Analyzed phase diagrams and Poincaré maps for stability evolution.
Main Results:
- Resonant frequency and amplitude-frequency response are tunable by tensile forces.
- Oscillation responses in in-plane directions show strong nonlinearity and coupling.
- Dynamic viscoelastic creep can be eliminated by adjusting tensile forces.
Conclusions:
- The developed model accurately predicts the coupled nonlinear dynamic behavior of DEs.
- Tensile forces are effective parameters for tuning oscillation, stability, and eliminating creep.
- The study provides insights into the stability evolution of DEs under complex loading conditions.
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