The contribution presents simulations of concrete fracture under high strain rates. For rela- tively low rates (below 0.1 m/s) rate dependency is attributed mostly to creep phenomenon, whereas for higher rates the leading phenomenon is inertia. Discrete meso-scale model is…
The contribution presents simulations of concrete fracture under high strain rates. For rela- tively low rates (below 0.1 m/s) rate dependency is attributed mostly to creep phenomenon, whereas for higher rates the leading phenomenon is inertia. Discrete meso-scale model is used to represent materialbehavior. Thankstotheexplicitrepresentationofmesoscalestructure,themaininertiaeffects should be captured automatically. However, the inertia due to smaller omitted particles must be phenomenologically represented as a rate dependent component of the constitutive relation. In the presented study, several model parameters settings are investigated and the results of the numerical simulations are compared with the experimental evidence.