Analysis of the formation mechanism of the slug and jet center hole of axisymmetric shaped charges

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Abstract

In the jet formation process of axisymmetric shaped charges, the slug is also formed. There is always a central hole in the symmetry axis of the jet and slug. The phenomenon was rarely mentioned and analyzed by the classical theory of shaped charges. For this problem, this paper attempts to explain the existence of the central hole in the jet and slug. Based on the analysis of recovery slug, we know that the jet and slug are in solid state in the process of formation. Through the analysis of X-flash radiographs of the stretching jet and particulation fracture, it is confirmed that the center holes in the jet are also present. Meanwhile, through the analysis of the microstructure of the recovered slug, it is found that there is a wave disturbance near the surface of the central hole. It can be speculated that the wave disturbance also exist in the jet. This effect may be one of the reasons for jet breakup. Due to the presence of the central hole in the jet, the density deficit of the jet obtained by other tests is very reasonable.

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Baoxiang, R., Gang, T., Peng, W., Changxing, D., Chunqiao, P., & Hongbo, M. (2018). Analysis of the formation mechanism of the slug and jet center hole of axisymmetric shaped charges. Results in Physics, 9, 135–141. https://doi.org/10.1016/j.rinp.2018.02.040

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