AN ANISOTROPIC HYPERELASTIC CONSTITTUTIVE MODEL WITH SHEAR INTERACTION FOR CORD-RUBBER TIRE COMPOSITES

A new anisotropic hyperelastic constitutive model for tire cord-rubber composites was proposed. The strain energy of the cord/rubber composite material was decomposed nominally into four parts, representing the strain energy of rubber, cords, shear and normal interactions between rubber and cords, respectively. A simple approach for fitting parameters in the model was given. Experimental data from the literature was used to obtain the material parameters in the constitutive model. The mechanical behavior of the composite was predicted and compared with experimental data for model validation. Very good agreement was obtained. The proposed model provides a foundation for finite element analysis of the tire in the future.