In this work, to forestall the domino effects resulting from the container explosion that may lead to serious damages to equipments and devices in a chemical industry park impacted by explosion fragments, we obtained the penetrating morphology, penetration energy and perforation diameter, of small-size tanks with different wall thicknesses that were impacted by conical projectiles at different axial impact angles, with the following results achieved:that the front penetrating morphology is nearly circular when the axial impact angle is 0°, and is nearly oval with two flangings when the axial impact angle is 15°, 30°, and 45°; that their backs are both dehiscent like petals; the larger the axial impact angle and tank wall thickness, the more penetration energy is needed; and that the axial impact angle and tank wall thickness have significant influence on the axial diameter of the perforation, but barely affect the circumferential diameter of the perforation. Also, based on the mechanics of perforation and the laws of conservation of momentum, we derived the residual velocity formula of conical projectiles suitable for axial impact angles ranging from 0 to 45 degrees.
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