FraMCoS 10 2019 Bayonne, France

Simulations of Split Hopkinson Pressure Bar by Discrete Mesoscale Model

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…

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Year 2019
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Abstract

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.