CONCRETE CHARACTERIZATION FOR BALLISTIC THREAT

Abstract

This ongoing study aims at building a robust approach for reliable simulation of concrete behavior under ballistic impact of Kinetic Energy Penetrator (KEP) from concrete characterization to penetration efficiency. The Holmquist-Johnson-Cook concrete (JHC) material model is used combined with advanced capabilities of γ-SPH formulation available in IMPETUS AFEATM software. A common concrete used in building industry is considered for the study (~35MPa compressive strength). To limit the number of tests, only the most relevant data regarding the penetration phenomena have been investigated: quasi-static compression and dynamic oedometric compression tests have been realized. The impact test is conducted on a confined concrete cylinder at hypersonic speed. The test is instrumented to evaluate the model prediction in terms of projectile deceleration and depth of penetration. The numerical simulation results are in good correlation with the tests and higher impact speed up to 900 m/s will be investigated soon.