The present work addresses the secondary debris from concrete slabs subjected to contact detonations. The analysis is based on a series of experimental tests using a newly developed test setup. This test setup allows a detailed analysis of the protective side of the concrete slab regarding the spatial velocity distribution of the secondary debris and the preceding fragmentation of the concrete. The variables of the test series are the thickness of the concrete slab, the steel fiber content and the mass of the explosive charge. The influence of the geometry of the explosive charge on the resulting load is determined using numerical simulations and taken into account in the experimental evaluations. Both, the spatial velocity distribution of the secondary debris and the geometry of the spalling crater are approximated by rotationally symmetric descriptions to derive the kinetic energy of the secondary debris. The derived kinetic energy of the secondary debris is then used for a quantitative evaluation of steel fibers in the concrete. In addition, numerical simulations are performed using two well-established material models to investigate their ability to simulate the resulting secondary debris. The most critical factors are determined to be the direction of the plastic flow and the fracture energy of the concrete at high strain rates. In the last chapter, the impact of the secondary debris on people is analyzed using a demonstrator that has been developed based on the experimental findings.    «

The present work addresses the secondary debris from concrete slabs subjected to contact detonations. The analysis is based on a series of experimental tests using a newly developed test setup. This test setup allows a detailed analysis of the protective side of the concrete slab regarding the spatial velocity distribution of the secondary debris and the preceding fragmentation of the concrete. The variables of the test series are the thickness of the concrete slab, the steel fiber content and th...    »