Abstract
Understanding concrete response facing warheads threats is important for both the design of strategic infrastructure protection and the prediction of warhead performances. This ongoing study aims at building a robust approach for the characterisation of concrete behaviour under ballistic impact of Kinetic Energy Penetrator (KEP). A set of tests has been developed and performed to fit the main parameters of the Holmquist Johnson Cook Concrete material model. Highly instrumented tests are conducted to improve the model prediction capability and to identify its limits. After a brief description of the test configuration, the paper focuses on the analysis of an impact test and presents preliminary simulation results.
Highlights
Design of strategic infrastructures requires the evaluation of its performance against warhead threat
This paper shows some preliminary results for a ballistic non-perforating impact and its simulation
The concrete specimen is represented with γ-SPH elements and the remaining parts are modelled with finite elements
Summary
Design of strategic infrastructures requires the evaluation of its performance against warhead threat. Predicting the response of concrete under such ballistic penetration and/or blast events requires a model with a good representation of some non-linear phenomena like compaction, cracks and spalling. Due to its rock-like behaviour, concrete material shows unconventional mechanical behaviour since its response is highly depended on pressure (higher pressure leads to higher strength). Numerical simulations of such events are quite challenging. Meshing choice is for instance important; for example, using finite elements may affect the compaction behaviour in case of element erosion Another difficulty for conducting simulation is related to the unavailability of a full set of material. Dynamic characterization data and ballistic tests results are not generally available for a specific concrete. This paper shows some preliminary results for a ballistic non-perforating impact and its simulation
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