Abstract
In recent years, the interest of the scientific community in perforated plates for ballistic protection has increased. Perforated plates do not represent protection by themselves, rather, they are used in the armour systems of armoured vehicles, in conjunction with base armour, since they are intended to induce bend stresses, where a penetrating core fracture occurs. The fragments are subsequently stopped by base armoured vehicle armour. Although for the first time used several decades ago, perforated plates are found to be attractive even today. The main reason is the combination of very convenient properties. Besides high mass effectiveness, they possess a high multi-impact resistance, since their perforations arrest cracks. Therefore, a relatively wide array of materials is suitable for perforated plate fabrication, ranging from alloy steel to some types of cast iron. Being made of metallic materials, raw material costs are relatively low compared to ceramics or composite materials, making them very attractive for present and future armoured vehicles. Finally, armour system consisting of a perforated plate and base plate at some distance, reduce the effectiveness of both shaped charge jets and act as blast mitigators.
Highlights
Passive armour is aimed to withstand the impact of projectiles and to protect represents the most important means of protecting the personnel and vehicle subsystems from enemy fire
The results suggest that a softer and more ductile austempered ductile iron (ADI)-400
adiabaticwere shearidentified: band (ASB)-induced crack formation can be partially inhibited due to the presence of perforations, (Figures 12 and 13). This makes the perforated plate material more resistant to multiple impacts compared to homogenous steel
Summary
Passive armour is aimed to withstand the impact of projectiles (shrapnel, bullets, missiles) and to protect represents the most important means of protecting the personnel and vehicle subsystems from enemy fire. Net to offer additional protection against shaped charges of German Panzerfaust recoilless Perforated plates represent a non-homogenous armour, usually employed as applique, or add-on armour of various armoured vehicles. They appear in predominantly light armoured vehicles, the widest type of armoured vehicles used. Zig-zagged and angled configurations were fully effective, fulfilling the ballistic protection criterion set at stopping all five kinetic energy shots from a Browning M2HB 12.7 mm heavy machinegun These configurations proved to be superior since the case where the projectile impacts two wires at the same time is completely excluded. Configuration of patented wires is indicated by a broken black line [15]
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