Layered composite increasing the resistance of patrol and intervention vehicles to the impact of improvised explosive devices (IED) from below

Abstract

Article citation info: (*) Tekst artykułu w polskiej wersji językowej dostępny w elektronicznym wydaniu kwartalnika na stronie www.ein.org.pl IntroductionPatrol 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 explo-• sions 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 appara-• tus 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. These are: the impact of fragments and the impact of the shock wave. The most unfavourable situation is an under-vehicle explosion. Due to the small distance from the target (at the moment, the clearance in passenger off-road vehicles is approx. 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.Requirements for the ballistic protection of cars should be considered in parallel with requirements concerning their mobility [15]. This necessitates the use of light materials for ballistic protection covers. On the other hand, such protections are usually required to perform the function of structural components, e.g. due to the manner of their installation, which is why the materials should be characterised by appropriate strength and rigidity. Modern materials for automotive applications, including ballistic covers for special cars, need to satisfy the requirements of multifunctionality and cost-effectiveness in the areas of production, operation, and disposal [9,10,11,25,29].The purpose of the study was to develop an additional, self-supporting ballistic cover for car bottoms, mounted on the outside to prevent the perforation of the base floor. In currently-used cars, the floor is usually made of ordinary steel sheets having a thickness of 1÷1.5 mm. Szudrowicz M. Layered composite increasing the resistance of patrol and intervention vehicles to the impact of improvised explosive devices (iEd) from below. Eksploatacja i Niezawodnosc -Maintenance and reliability 2018; 20 (1): 9-15, http://dx

Experimental and Numerical Study of Ballistic Resistance of Composites Based on Sandwich Metallic Foams

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