ABSTRACT
This paper presents the results of an experimental study and the analytical modelling performed to investigate the localised response of steel fibre ultra high strength concrete with compressive strengths greater than 170 MPa, subjected to high velocity impact by fragment simulated projectiles (FSP) at velocities ranging from ~700 to 1000 m/s. The steel fibre reinforced ultra high-strength concrete used in this study is commercialised under the name of “Ductal” by VSL Australia Pty. Ltd. Two novel techniques, digital photogrammetry technique and 3D laser scanning, employed to measure the penetration depth and crater diameter in target specimen are briefly described. The results obtained are compared with commonly used empirical relationships including the Conwep and modified NDRC equations. This paper also presents the finite element investigation of the panel specimens using LS DYNA and AUTODYN. The analytical results compare well with the experimental results. A constitutive model for ultra high strength concrete, used to model the specimen along with procedures to improve the analytical predictions, is also described in the paper.
