Research on Dynamic Crack Propagation Characteristics of V-shaped Energy-accumulating Charge Pack at Different Angles

In order to study the crack propagation characteristics of the V-shaped energy-storage package at different angles, a new numerical laser caustics test system was used to observe the fracture process of the V-shaped energy-concentrating charge package, the mechanical distribution mechanism around the blast hole of the energy-accumulating charge package is analyzed, and using fractal theory to evaluate the damage degree of the energy-accumulating medicine package. Series of caustics test results show, the main crack has a longer expansion length in the energy-concentrating direction, and the crack expansion length is shorter in the non-energy-concentrating direction, the fractal results of the shaped charge pack show that as the angle of the shaped charge pack increases, the fractal dimension of the binarized picture of the shaped charge pack gradually becomes smaller, and the crack propagation complexity becomes lower and lower, and the main crack is along the energy gathering direction The directivity is becoming less and less obvious, When the energy gathering angle is 120°, the main crack propagation process is similar to that of the circular charge (control group).