Study of penetration performance of embowed linear-shaped charge based on SPH method

Linear-shaped charges (LSCs) are widely used to incise or demolish target structures in civilian and defense industries. In such tasks as removing submarine pipelines, or cutting thin-walled structures in offshore platforms, causing a long penetration hole is considered as the primary objective for LSCs. For the improvement of the penetration performance of LSCs, especially increasing the penetration length, a novel linear-shaped charge called embowed linear-shaped charge (ELSC) is proposed in this paper. Based on smoothed particle hydrodynamics (SPH) method, numerical models of the ELSC and the LSC with equal charge are established. Then, the results of jet formation and penetration performance of the ELSC and the LSC are compared and analyzed. It is found that the longitudinal length of the jet of the ELSC before penetration is 36.4% larger than that of the LSC. Besides, the length and the width of the hole penetrated by the ELSC are 20.4% and 26.6% larger than those of the LSC.