Mesh Size Influence of the Concrete Slab FE Model Exposed to Impact Load for Various Material Models
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Daniel Jindra,
Petr Hradil,
Jiri Kala,
Petr Kral
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| Transactions of the VSB - Technical University of Ostrava, Civil Engineering Series |
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2020, Volume 20, Issue 2, Pages 1-7
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Doi: 10.35181/tces-2020-0010
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Numerical approach using the FEM has been used to model the behaviour of the reinforced concrete specimen subjected to the pressure blast wave. The concrete structure is a slab freely supported around the perimeter by a steel plate and a concrete base. A simplified 3D blast model has been used, which involves the pure Lagrangian approach of FEM. The analyses have been conducted using explicit solver. 3 different non-linear material models of concrete have been used to capture the concrete behaviour: CSCM (Continuous surface cap model), Schwer Murray continuous surface cap model, and JHC (Johnson-Holmquist-Cook) material model. Influences of various mesh sizes on the final results (crack patterns, vertical deflection, strain-time dependence) are being monitored, compared with physical experiment data and discussed.
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