Study on damage criterion of fragments behind target to key components in typical armored vehicles

In order to study the damage ability of the fragments behind the target to the key components of a typical tank, the numerical simulation method was used to simulate the penetration process of diamond fragments with different mass into the equivalent targets of different key components, and the variation law of kinetic energy and velocity during the penetration process of the fragments behind the target into the target plate was obtained, and the ultimate penetration velocity of diamond fragments with mass of 0.3~2.5g and equivalent target thickness of 4~7mm was obtained. The results show that with the increase of diamond fragments' mass, the ultimate penetration speed of fragments to the equivalent target of key components decreases, and the ballistic limit values of v50 and v90 under different working conditions are obtained, and the ballistic limit standard deviation <i><strong>&sigma;</strong></i> is calculated, and the v0 and v100 at both ends of the ballistic limit distribution range are deduced, which provides a basis for the research on the damage effect of key components of tanks after fragments penetrate the target.