A Study on the Effects of Hyperelastic Constitutive Models on the Static Characteristic Prediction of Rubber Isolator.

The stress-strain data in uniaxial, planar and biaxial tension tests of standard rubber specimen are measured, based on which the parameters of 5 common hyperelastic constitutive models are identified with least square principle, and the fitting accuracies of different models are compared. Then taking the rubber isolator of a real vehicle as an example, its force-displacement curves under three typical engineering strains with different constitutive models are calculated and compared with measured data. The results show that in dealing with smaller strain values, Mooney-Rivlin model has the highest accuracy and computational stability among all the models, while in dealing with large strain values, Van der Waals model and Ogden3 model have better accuracies than other models. [ABSTRACT FROM AUTHOR]