Static And Dynamic Analysis Of Rubber Elastomers

In this paper,the static and dynamic properties of rubber isolators are investigated.Simultaneously, radial-torsional coupling analysis is also discussed. Uniaxial tension,biaxial tension and planar tension test are conducted to identify hyperelastic material of rubber, advantages and disadvantages of several constitutive models( mooney,ogden yeoh) are illustrated and subsequently the data processing methods for estimating constitutive parameters of hyperelastic model are discussed, and the accuracy of various hyperelastic models for fitting the test data is compared, which further identify the rationality and accuracy of the constitutive model parameters. The main research contents are list as follows:A hyperelastic-viscoelastic-friction model is presented, where influences of frequency and amplitude are taken into account through fractional Kelvin Voigt model and berg friction model respectively. The amplitude independent parameters are evaluated at a low frequency, large amplitude hysteresis loop and the frequency independent parameters are evaluated at a large frequency, low amplitude hysteresis loop, which are optimized to obtain a best fit in a least square sense compared to measurements according to the error formulation.The proposed model is implemented in a general-purpose finite element code-ABAQUS. The dynamic properties of the rubber bushing are calculated and compared with the experiment, which will help to improve the efficiency in elastomer matching design.Based on the proposed model, a simulation plan is proposed for rubber bushing radial-torsional coupling analysis. The simulation results are used to assess bushing behavior and to determine the strength of radial-torsional coupling. An interesting feature of the coupling response is that radial force decreases and the increases with torsion.