Multiple adiabatic shear bands in Ti-6Al-4V targets under ballistic impact

摘要

In order to research the formation and spread of adiabatic shear bands in Ti-6Al-4V targets,LS-DYNA code is used to simulate the ballistic impact process.The projectile used in the impact test is a flat-headed steel cylinder with diameter of 7.62mm and length of 39mm.The results of simulated and impact test are in good agreement.Multiple adiabatic shear bands form in Ti-6Al-4V targets under high-speed ballistic impact.Adiabatic shear bands were found to extend parallel with a certain distance.The formation and distribution of adiabatic shear bands was related to the breaking-off of projectiles,which was caused by the distribution of maximum shear stress in Ti-6Al-4V targets and projectiles.