Quasi-static and non-linear kinetic analysis method for uncertainty of viscoelastic dielectric elastomer based on interval method

Abstract

The invention discloses a quasi-static and non-linear kinetic analysis method for the uncertainty of a viscoelastic dielectric elastomer based on an interval method. In the method, a viscoelastic kinetic model of the dielectric elastomer is provided, uncertainty of material parameters, external load and voltage is considered, and creep analysis, relaxation analysis and kinetic response analysis are carried out on the dielectric elastomer with interval uncertainty parameters by introducing an interval perturbation method and a first-order Taylor expansion method. The effectiveness of the interval method provided by the invention is verified by a Monte Carlo simulation method, and the uncertainty prediction method can be used in the design of an active control system taking a dielectric elastomer as a driver or a sensor in the future.

Description

technical field [0001] The present invention relates to the field of quasi-static and nonlinear dynamic analysis of dielectric elastomers, in particular to a quasi-static and nonlinear dynamic analysis method for dielectric elastomers based on the interval method when considering the uncertainty of parameters such as external force, material, and voltage , which provides a feasible design method for active control systems using dielectric elastomers as actuators or sensors. Background technique [0002] As a soft active material, Dielectric Elastomer (DE) has been widely used in artificial muscle actuators, acoustic actuators, sensors, speakers, active vibration control due to its large deformation, light weight, and high flexibility. and many other engineering fields. When a voltage is applied to the compatible electrodes at both ends of the dielectric elastomer, the charges on the upper and lower electrodes interact, so that the elastic body expands in the plane while the...

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Problems solved by technology

Usually, small errors in the input parameters will lead to significant deviations in the dynamic analysis, so in order to ensure accurate analysis of the upper and lower bounds of the structural response, it is necessary to collect a large amount of data to obtain the probability density function, but for something like a dielectric elastomer For exploratory materials, not enough data has been collected in practical applications. It may be better to use non-probabilistic methods such as interval method or convex model to deal with the uncertainty of parameters

[0005] So far, the dynamic response of viscoelastic dielectric elastomers has not been analyzed taking into account the uncertainty of the material parameters

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