PSI - Issue 41

ScienceDirect Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2022) 000–000 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2022) 000–000 Available online at www.sciencedirect.com Procedia Structural Integrity 41 (2022) 589–597

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www.elsevier.com/locate/procedia

2452-3216 © 2022 Ignatova A.M., Yudin M.V., Voronov V.L., Ignatov M.N., Gladky I.L., Inozemtsev A.A., Naimark O.B. 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 MedFract2Guest Editors. 2452-3216 © 2022 Ignatova A.M., Yudin M.V., Voronov V.L., Ignatov M.N., Gladky I.L., Inozemtsev A.A., Naimark O.B. 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 MedFract2Guest Editors. Abstract Determination of the velocity of individual fragments of a fragmented matter following an impact is necessary for studying the dynamic mechanical properties of materials. Various models descriptive of specific collision cases are used to predict the fragmentation parameters including the velocity of fragments. The models have been mostly designed to describe metallic materials. The research aims at experimental determination of the fragments destruction velocity following an impact against hard-melting non-metallic silicate material (potassium fluorphlogopite). Potassium fluorphlogopite targets have been shaped as flat plates sized 280x160x15 mm. The 23 mm steel ball (Steel 20) was used as a projectile. Four impact tests have been conducted with the following parameters: ball velocity 230 m/s and collision angle 90°; ball velocity 120 m/s and collision angle 90°; ball velocity 230 m/s and collision angle 30°; ball velocity 120 m/s and collision angle 30°. Velocity of burst fragments was determined on the basis of a video recording with Photron Fastcam SA5 high-speed camera. The video has been processed using frame-by-frame image analysis in ImageJ-FiJi software (TrackMate module). The experiment determined the velocities of individual burst fragments following an impact against hard-melting non-metallic silicate material, specifically potassium * Corresponding author. E-mail address: naimark@icmm.ru * Corresponding author. E-mail address: naimark@icmm.ru 2nd Mediterranean Conference on Fracture and Structural Integrity Velocity characteristics of fracture fragments of mica-crystal materials under high-speed impact 2nd Mediterranean Conference on Fracture and Structural Integrity Velocity characteristics of fracture fragments of mica-crystal materials under high-speed impact Ignatova A.M. a , Yudin M.V. b , Voronov V.L. b , Ignatov M.N., Gladky I.L. c , Inozemtsev A.A. c , Naimark O.B. a * Ignatova A.M. a , Yudin M.V. b , Voronov V.L. b , Ignatov M.N., Gladky I.L. c , Inozemtsev A.A. c , Naimark O.B. a * a Institute of Continuous Media Mechanics of the Ural Branch of the Russian Academy of Sciences, 1 Akademika Koroleva Street, Perm 614013, Russia b Perm National Research Polytechnic University, 29 Komsomolsky Prospect , Perm 614990, Russia c UEC-Aviadvigatel, 93, Komsomolsky prospect, Perm 614990, Russia Abstract Determination of the velocity of individual fragments of a fragmented matter following an impact is necessary for studying the dynamic mechanical properties of materials. Various models descriptive of specific collision cases are used to predict the fragmentation parameters including the velocity of fragments. The models have been mostly design d to describe m tallic materials. The rese rch aims at experimental de rmination of the fragments d tructi n veloc ty following an imp ct gainst hard-melting non-metallic silicate material (potass um f uorphlogopite). Potassium fluorp logopite targets have be n shaped as fla plat s sized 280x160x15 mm. The 23 mm steel ball (Steel 20) was use as a projecti e. Four impact t sts h ve been conducted with th following param ters: ball velocity 230 m/s and c l ision angle 90°; ball velocity 120 /s and c llision angle 90°; ball v locity 230 m/s and collisi n angle 30°; ball ve ocity 120 m/s and collision angle 30°. Velocity of bur t fragments was determin d on the basis of a video recording with Photr n Fastcam SA5 high-speed cam ra. The vid o has been processed using frame-by-frame image analysis in ImageJ-FiJi software (Tra kMate module). The experiment determin d the velocitie of individual burst fragments f llowing an impact against hard-m ting non-metallic silicate material, specifically pot ssium a Institute of Continuous Media Mechanics of the Ural Branch of the Russian Academy of Sciences, 1 Akademika Koroleva Street, Perm 614013, Russia b Perm National Research Polytechnic University, 29 Komsomolsky Prospect , Perm 614990, Russia c UEC-Aviadvigatel, 93, Komsomolsky prospect, Perm 614990, Russia

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 MedFract2Guest Editors. 10.1016/j.prostr.2022.05.067