Constitutive modeling of rubber-like materials: an alternative material model

This article proposes an alternative strain energy density function to describe the hyperelastic behavior of rubber-like materials under various deformations. This proposed strain energy function fulfilled all the necessary characteristics of a hyperelastic material model. This function consists of four material parameters and represents an invariant-based material model. Also, the material parameters are kept constant for the different modes of loading conditions. The model solution based on the proposed energy function is mathematically simple and well suited for all stretching ranges. The model solution is further tested with the existing experimental data and compared with the results of available model solutions. The findings of the model solution agree well with both experimental and theoretical results available in the literature.