Abstract
Model layered composites were made of polyester resin reinforced with layers of glass fibre and aramid fibre fabrics. The fabrics for the study were selected in a manner enabling the comparison of their ballistic resistance depending on the material type and density. Additionally, aluminium plates were used to produce the composites.The study examined the resistance of the model composites to 1.1 g fragment simulating projectile (FSP) penetration, their susceptibility to deformation caused by shock waves produced by pure TNT charges, and their resistance to the effects of detonation of model improvised explosive devices (IED) containing fragments in the form of bearing balls. The analysis and optimisation of the test results enabled the selection of a layer configuration combining the materials studied that has the lowest area density and that protects car bottom structures against perforation in the case of a detonation of a small improvised explosive device.
Highlights
Patrol and intervention cars are used in regions threatened by terrorism for purposes such as: patrolling areas where there is a risk of fire attacks and explosions of explosive charges; intervention activities, in particular combating terrorist groups; peace-keeping operations, separating belligerents, and restoring and maintaining public order; transporting officers and other persons and cargoes requiring special protection; transporting and ensuring the functioning of devices and apparatus used for reconnaissance, identification, and recording.As for the detonation of small fragmentation explosive charges, i.e.: anti-personnel mines, hand grenades, and improvised charges, two major types of impact that endanger the lives and health of personnel can be distinguished
The cover is a layered composite mounted on the bottom of the car, protecting occupants of the car against injury or death and the car floor structure against damage caused by detonation of small fragmentation charges
This approach necessitates developing non-invasive methods of inspecting composite integrity,
Summary
As for the detonation of small fragmentation explosive charges, i.e.: anti-personnel mines, hand grenades, and improvised charges, two major types of impact that endanger the lives and health of personnel can be distinguished. The most unfavourable situation is an under-vehicle explosion. Due to the small distance from the target 0.3÷0.5 m), fragments hit the floor material, which is pre-loaded with the shock wave. Very frequently, in such types of cars, the personnel keep their legs directly on the floor and the seats are made of thin textiles
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