A viscoelastoplastic approach to model nonlinear polymeric materials

Resumo

This work presents a new viscoelastoplastic model to describe the nonlinear behavior of polymers. In
this paper, an extension of the results published by Kühl et al. [1] and Kühl and Muñoz-Rojas [2] is developed,
considering viscoelastic and viscoplastic strains simultaneously. To model the viscoelastic strain, a master curve
approach is employed, as proposed by Kühl and Muñoz-Rojas. To account for the viscoplastic deformation, a
power law is used, as detailed by Kühl [3]. Therefore, a final viscoelastoplastic model is defined to predict the
behavior of polymeric materials. The procedure proposed in this work is compared to the traditional
interpolation of properties, and a discussion of the results is provided.