Abstract
To investigate the dynamic behavior of expansion-induced fracture of a metal cylindrical shell driven by the detonation of condensed explosives, detonation driving tests were designed and implemented under two working conditions, namely, (i) the metal cylindrical shells made up of different metals were driven by the same explosive, and (ii) the cylindrical shells made up of the same metal were driven by different explosives. The entire expansion process was recorded using a high-speed scanning camera, and the curves of expansion displacement and velocity vs. time were plotted. The applicability of the parameters characterizing the detonation driving capability of explosive was also analyzed. The SEM images of the fragment fracture sections of the metal shells show that the metal fracture mode is related to the driving capability of explosive and the properties of metals. The shells made up of metals with a suitable ductility showed mainly the ductile tensile fracture with local brittle fractures, while the shells made up of metals with a poor ductility showed mainly the brittle shear fracture.
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