Numerical simulation of cutting capacity of shaped charge in blasting demolition of steel construction

This paper presents numerical simulation of the formation, the fragmentation, and the penetration into plates of metal jets that develops in a linear shaped charge. A fluid-structure coupling algorithm and an Arbitrary Lagrangian- Eulerian (ALE) method were used to treat the large deformation of the metal jet. The cutting results of simulation are compared with the test data, an agreement is reasonably good. The larger density of the liner material is noticeable to improve the cutting capability. The effect of standoff distance and the ultimate strength of steel plates were also considered. The simulation demonstrates the importance of the standoff distance and shows that the cutting depths decrease with the increasing of ultimate strength of steel plates.