Method of experimental modeling of penetration of high-velocity impact elements in armor materials
DOI:
https://doi.org/10.17721/1812-5409.2025/2.18Keywords:
armor material, shock wave loading, armor penetration, microhardness, microhardness mappingAbstract
The work developed and created an experimental complex of a desktop acceleration stand in which a ball with a diameter of 8 mm made of ШХ15 steel is accelerated by the energy of gases from a mounting cartridge while moving along a channel 570 mm long with a controlled speed from 200 to 1500 m/s and at various angles of attack from 45 to 90°. The acceleration stand was tested. It was found that after firing at speeds of 200 m/s and 600 m/s, various types of armor materials exhibited plastic dents of various shapes and depths. At the same time, the residual dent shows traces of the process of melting and extrusion of the armor material from the dent. When firing a multi-layer armor package with a bullet at a speed of 600 m/s, no deformation of the bullet is observed. To evaluate the physical and mechanical characteristics of the multilayer armor material under study, a series of microhardness measurements was performed at the points of interaction on the sample surface. Microhardness testing was performed using the Vickers static method (PMT-3). It was found that the microhardness value near the residual plastic indentation undergoes significant changes. Initially, the microhardness value decreases by ≈ 0.4 GPa and, depending on the mutually perpendicular lines along which the surface profiling took place, is equal to 0.026 GPa and 0.07 GPa. Then the microhardness value increases to practically average values of 0.35 GPa. Therefore, a change in microhardness during surface profiling indicates changes in the physical and mechanical properties of the material in a small area near the point of impact. At the same time, the hardness of the material in these areas is significantly reduced, and repeated firing may result in complete penetration of the multilayer armor package.
Pages of the article in the issue: 122 - 125
Language of the article: Ukrainian
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Copyright (c) 2025 Mykola Melnichenko, Leonid Yarovoi, Natalia Puchko, Mykhailo Vodotovka
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