A HYBRID HYPERELASTIC CONSTITUTIVE MODEL OF RUBBER MATERIALS

摘要

The constitutive model of incompressible rubber materials is investigated in this paper.A hybrid hyperelastic constitutive model is proposed combining the Ganssian network model for small stratus and 8-chain network model for large stretches.With the material constants obtained by fitting the uinaxial extension data from Treloar with Gaussian network model and 8-chain network model,the predictions from the proposed hybrid model for equibiaxial extension and pure shear are in good agreement with the test,and shows significant improvements in modeling accuracy as compared to the two constituent models,especially for shear data.