Dynamic behaviour of polycarbonate/polyurethane multi-layer for transparent armor

This paper deals with the study of the dynamic behaviour of layered Polycarbonate (PC)/Polyurethane (PU) polymers used in lightweight transparent armor bilayer concept. In fact, dimensioning and optimizing this armor concepts need a determination and an understanding of behaviour not only of the multi-layer but also of each component (PC and PU). Thus after an adaptation of dynamic compressive tests in different configurations, it appears that the initial multi-axial prestress of PU is one of the most important parameter for material and layered response. A numerical approach carried out with a monodimensional finite difference code is made to analyze more accurately the system response.