ABSTRACT
The subjected paper is focused on the description of implementation of the Drucker-Prager and Lee-Fenves nonlinear material models with viscous enhancement in the finite element solver. An advantage of the implementation is based on possibility to enter the stress-strain curve as an input for the calculation instead of an array of material model parameters, which is common in commercial material libraries. The paper contains theoretical background describing theory of interested models and the description of used Duvaut-Lions viscous regularization. The presented results show different responses of the numerical model to dynamic loading with various strain rates. The aim of the paper is to extend the interest of engineers in the field of viscous nonlinear material models and in the modelling of mechanical response of concrete structures to rapid loading.
