The Thickness Effect Of Metal Armor With Poerstructure Penetrating By Small Caliber Projectile

Pore structure is well developed in the armor steel material with through holes under certain condition. Pore structure metal armor shows superior armor pierced-resistance to traditional armor steel with its unique architectural feature. In the present work, penetration method is employed on the study of thickness effect of pore structure metal armor to minor caliber armor-piercing bullet. The target plate is shotted in angle a, using12.7mm armor-piercing incendiary. Armor steel A with thickness of4mm,6mm,8mm and10mm is used in thickness effect test. In addition, armor steel B and C with thickness of6mm are also studied thickness effect test. Stack test is carried out on double layer of4mm armor steel A and double layer of5mm armor steel A. Experimental results demonstrated that protection efficiency Nc of pore structure metal armor first increased then reduced with the increase of the plate thickness. Protection efficiency Nc of pore structure metal armor varies from one another in target material with the same thickness. Target ballistic performance could be further improved through matching of hardness and toughness. It is concluded that ballistic performance of single-layer metal armor was better than double-layer metal armor with the same thickness. Thickness effect result obtained from numerical simulation showed similar regularity with that of target test results.Ballistic resistance mechanism of pore structure metal armor was systematically explored through thickness effect test and other tests towards small caliber projectile. In summary, it provided new insights and technical support for engineering application.