PSI - Issue 40

Available online at www.sciencedirect.com Available online at www.sciencedirect.com Sci nceD rect Structural Integrity Procedia 00 (2022) 000 – 000 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2022) 000 – 000

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Procedia Structural Integrity 40 (2022) 185–193

© 2022 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of the15th International Conference on Mechanics, Resources and Diagnostics of Materials and Structures. Abstract The individual velocity of rupture fragments after impact is necessary to evaluate how dangerous they are after dispersion. The aim of the study is to experimentally determine the velocity of rupture fragments upon impact on a refractory non-metallic silicate material (potassium fluorophlogopite). The targets made from potassium fluorophlogopite were shaped in the form of flat plates with a size of 280x160x15 mm. A steel ball with a diameter of 23 mm was used as a projectile. Four impact experiments were pe rformed with the following parameters: ball speed of 230 m/s and collision angle of 90°; ball speed of 120 m/s and collision angle of 90°; ball speed of 230 m/s and collision angle of 30°; ball speed of 120 m/s and collision angle of 30°. T he velocity of the rupture fragments was determined through video recording obtained using a high-speed Photron Fastcam SA5 camera. The video was processed by analyzing frame-by-frame images using the ImageJ-FiJi. The velocities of individual rupture fragments upon impact on a refractory non-metallic silicate material are experimentally determined using the example of potassium fluorophlogopite. It is established that the nature of the change in the fragment velocity relative to time corresponds to a hyperbolic function and depends on the kinetic energy of the fragments. A coefficient for calculating the change in the velocity of rupture fragments of potassium fluorophlogopite relative to time is proposed. © 2022 Ignatova A.M., Naimark O.B., Yudin M.V., Voronov V.L., Ignatov M.N. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of the15th International Conference on Mechanics, Resource and Diagnostics of Materials and Structures. Keywords: non-metallic material, cracks, destruction, impact, armor material, fragmentation, image analysis non-metallic silicate material under high-velocity impact Ignatova A.M. a, *, Naimark O.B. a , Yudin M.V. b , Voronov V.L. b , Ignatov M.N. b a Institute of Continuous Media Mechanics of the Ural Branch of Russian Academy of Science (ICMM UB RAS), Academika Koroleva st, 1, Perm 614013, Russia b Perm National Research Polytechnic University, Komsomolsky prospekt, 29, Perm 614990, Russia Abstract The individual velocity of rupture fragments after impact is necessary to evaluate how dangerous they are after dispersion. The aim of the study is to experimentally d termin the velocity of rupture fr gm nts upon impact on a fractory non-metallic s licate material (potassium fluorophlogopite). The targets made from potassium fluoro hlogopite were shaped in the for of f at plates with a size f 280x160x15 mm. A s el ball with a di meter of 23 mm was used as a rojectil . Four impact experiments wer pe rformed with the following param t rs: ball spee of 230 m/s and collision angle of 90°; ball speed of 120 m/s a d collision angl of 90°; ball speed of 230 /s and collision angle of 30°; ball speed of 120 m/s and co i ion angle of 30°. T he ve oc ty of th rupture fragm nts was determi ed through video recording obtained using a high-speed Photron Fastcam SA5 camera. The video was proc ssed by analyz g frame-by-frame images using the Ima eJ-F Ji. Th velocities of individual ruptu e fragments upon impa t on a refr ctory on-metallic silicate terial are exp ri entally determined us ng the example of potassium fluorophlogopite. It is established that the nature of the chang n th fragment velocity r lat v to t me corr sponds to a hyperbolic function and depends on the kinetic en rgy of the fragme ts. A coe ficient for cal ulating th chang in the veloci y of ru ture fragments of potassium fluorophlogopite relative o time is proposed. © 2022 Ignatova A.M., Naimark O.B., Yudin M.V., Voronov V.L., Ignatov M.N. Published by ELSEVIER B.V. This is an open ccess article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review u der responsibility of scientific committe of the15th International C ference on Mechanics, Resource and Diagnostics of Materials and S ructur s. Keywords: non-met llic material, c acks, destruction, impact, armor material, fragmentation, image analysis 15th International Conference on Mechanics, Resource and Diagnostics of Materials and Structures Experimental determination of fragment dynamics of refractory non-metallic silicate material under high-velocity impact Ignatova A.M. a, *, Naimark O.B. a , Yudin M.V. b , Voronov V.L. b , Ignatov M.N. b a Institute of Continuous Media Mechanics of the Ural Branch of Russian Academy of Science (ICMM UB RAS), Academika Koroleva st, 1, Perm 614013, Russia b Perm National Research Polytechnic University, Komsomolsky prospekt, 29, Perm 614990, Russia 15th International Conference on Mechanics, Resource and Diagnostics of Materials and Stru tures Experimental determination of fragment dynamics of refractory

* Corresponding author. Tel.: +7-922-370-3268. E-mail address: iampstu@gmail.com * Corresponding author. Tel.: +7-922-370-3268. E-mail address: iampstu@gmail.com

2452-3216 © 2022 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of the15th International Conference on Mechanics, Resource and Diagnostics of Materials and Structures. 2452-3216 © 2022 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review u der responsibility of t scientific committe of the15th Int rnational C ference o Mechanics, Resource and Diagnostics of Materials and Structures.

2452-3216 © 2022 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of the15th International Conference on Mechanics, Resources and Diagnostics

of Materials and Structures. 10.1016/j.prostr.2022.04.025