"Mechanical properties and hyperelastic constitutive model of microporous rubber"

Based on the uniaxial tensile and compression tests of the microporous rubber material, the superelastic constitutive model was used to fit the test data, and the accuracy evaluation method was used to assess the fitting effect. The influence of the constitutive model on the strain intervals that was applicable to the microporous rubber material was analyzed. The effectiveness of the finite element model was verified for the static stiffness of the microporous rubber material using the fitted constitutive parameters. The results showed that the material had a strong Mullins effect in the test and Mooney-Rivlin 5 was the best fit. The relative error between the predicted value and the test value of the static stiffness of the finite element model was 9.85%.