Small Linear Shaped Cutting Parameters Of Research And Design

Linear shaped charges which have high cutting capability are available for use as explosive cutters to cut off metals and other materials. Parameters of the mini-linear shaped cumulative cutter are studied and designed. Numerical simulations of the linear shaped charge are applied on the series of different opening angles, different wall thicknesses, different head heights of charges, and different linear shapes. Finally the optimal linear opening angle, wall thickness, and head height are determined through the numerical simulation and theoretical analysis. The data and figures of the dynamic process can be depicted by the simulation. The mini-linear shaped cumulative cutter jet which is three-dimensional is discovered through the investigation of the experiments. Many aspects of shaped charge fabrication and assembly can influence the jet configuration. The effective standoff range is found out through a series of experiments of shaped charges with different standoffs. There is more spallation on the back of the target when the standoff is lower. The penetration performance is improved with the use of the improved long linear which take place of the short linear. The mini-linear shaped cumulative cutter is available for the use in the water, but the shell of the cutter must be airproofed well. The parameters of the cutter which is designed in this dissertation are as follow: the opening angle is 90°, the wall thickness is 1.5mm, the head heights of charges is 48.5mm, and the effective standoff range is 5-30mm. The rift on the target which is cut by the cutter is straight and coherent. The deepness of the rift is more than 30mm, and the wideness is over 12mm. The mini--linear shaped cumulative cutter can meet the engineering demand.