弹坑等
4.A shallow subsurface nuclear explosion produces a large crater, obliterating facilities within its radius and any just beyond it where strong stresses rupture the earth.
5.He crept into No Man’s Land and lay doggo in a shell-hole close to the enemy’s barbed wire.
6.It left 2 military vehicles burning and a large crater where explosives went off.
7.Adiabatic shear bands (ASB) were formed in a target plate of steel 30MnCrNiMoB,upon whichan imitative armour-piercing projectile impacts at high speed. Although ASB as a whole is fragile,the tough/fragile microstructures within ASB take place periodically
8.The results show that τ is independent of the original velocity of the projectile. On the other hand,the shear strain distributions near the dent measured by means of the banded structures within the matrix of the steel targets are inhomogeneous. Also,the shear strain rates of the martix and the ASB near the dent are determined during the penetration,which are in the order of 10 4 s -1 and 10 5 s -1 respectively.
