Specific features of fragmentation of preliminary deformed and hydrogen charged steel 45 under explosive load

Keywords

shell fragmentation, elastoplastic deformation, hydrogen embrittlement, ex¬plosive loading, number of fragments, shell structures, steel, hydrogen charging, hydrogen concentration, stress-strain state.

Cite as

Ivanytskyi Ya. L., Maksymenko O. P., Shtayura S. Т., Hrynenko М. V., and Andreiko І. М. Specific features of fragmentation of preliminary deformed and hydrogen charged steel 45 under explosive load. Physicochemical Mechanics of Materials. 2026. 62(1), 095-099.

https://doi.org/10.15407/pcmm2026.01.095

Abstract

The results of an experimental study on the effect of preliminary elastoplastic deformation and hydrogen charging of steel 45 on the fragmentation intensity of cylindrical shell struc¬tures under internal explosive loading are presented. The preliminary elastoplastic defor¬mation was carried out by pressing a steel ball into a hole along the axis of a cylindrical specimen, creating local plastic zones and damage. Part of the specimens, after deformation, were subjected to hydrogen charging in a special chamber to reduce the material plasticity. Prepared hydrogen-charged and check (uncharged) specimens were filled with explosive charges and tested at a polygon. The results showed that the specific fragmentation para¬meter for hydrogen-charged specimens was more than 2.4 times higher than that for un¬charged specimens. The proposed approach provides a simple, technology-based method for controlling shell fragmentation without complex geometric stress concentrators. A number of fragments and their weight was analyzed.

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