Numerical analysis of v-shaped protective plates at various angles subjected to blast loading - a comparative analysis

The mechanical response of blast-resistant vehicles, such as Infantry Fighting Vehicles (IFVs), Resistant Ambush-Protected (MRAP) vehicles, is crucial for their effective design. When designing armored vehicles, it is important to achieve a balance between rigid designs that transmit blast forces to the troop's cabins and softer designs that prevent excessive structure deformation hazardous to the troops. This study investigates the performance of V-shaped plates at different angles under blast loading. The focus is on modeling blast effects using the Conventional Weapon (ConWep) method and the Johnson-Cook material model. The material used for V-shaped protective plates STRENX700 (S690QL) armor steel is commonly used for blast protection in Anti-Landmine (ALM) Vehicles. The blast-wave induces large deformation, erosion, high strain rates, non-linear material behavior and fragmentation. The numerical simulation results are presented in the form of vertical displacement of the central node on the protective plate, von Mises equivalent stress, and equivalent plastic strain.