Volume 2, 2009DYMAT 2009 - 9th International Conference on the Mechanical and Physical Behaviour of Materials under Dynamic Loading
|Page(s)||1715 - 1721|
|Published online||15 September 2009|
Experimental & numerical studies on ballistic impact of armour steel by armour piercing projectilesA. Banerjee and N. Nayak
Proof & Experimental Establishment, Defence Research & Development Organisation, Chandipur, 756025 Balasore, India
Published online: 15 September 2009
Ballistic impact response of 40 mm thick Rolled Homogenous Armor (RHA) when impacted by two types of armor piercing (AP) projectiles of different shape and metallurgy has been reported in this paper. Armor perforation by plugging was observed when 30 mm triple conical nosed AP projectile was impacted above the ballistic limit (BL), whereas a petalling mode of failure for same armor was observed when impacted with a 40 mm ogive nosed projectile. Optical microscopic study on impacted RHA specimen showed presence of adiabatic shear bands for the former whereas grain elongation and ductile tearing mode of fracture in the latter. Numerical simulation of the plugging failure of 40 mm RHA impacted by 30 mm AP shot was attempted with the help of commercial FE code ANSYS-LS DYNA using plastic kinematic hardening material model. The numerical analysis approach was found to be promising for prediction of ballistic impact response of armours with reliable degree of accuracy and can supplement the time consuming and costly dynamic experiments.
© EDP Sciences 2009