Penetration of steel ingot by linear shaped charge with cuniform cove

To obtain the characteristics and the mechanisms behind the penetration of steel ingot by linear shaped charge (LSC) with a cuniform cover, we built a three-dimensional numerical model using ANSYS/LS-DYNA program and performed a numerical simulation study. The actual cutting experiment was conducted on the basis of this numerical simulation and the following results were achieved: For a given standoff, the depth of LSC cutting steel ingot increases at first rapidly along with of time and then this increase gradually slows down; for different standoffs, the depth of LSC cutting steel ingot increases more slowly with the increase of the standoff. The penetration depth changes little at the standoffs ranging from 40 to 60 mm and from 70 to 120 mm, showing an insensitivity to the variation of the standoff. Different shapes of the cutting cross-sections of the steel ingot at different time were obtained under different conditions of the standoff. The results show that the penetration results of numerical simulation were consistent with those of the cutting experiment. Our three-dimensional numerical model can simulate the process of the penetration of the steel ingot by the real cutter. The characteristics and the mechanisms obtained can better reflect the actual cutting process.