PSI - Issue 37

ScienceDirect Structural Integrity Procedia 00 (2019) 000 – 000 Structural Integrity Procedia 00 (2019) 000 – 000 Available online at www.sciencedirect.com Available online at www.sciencedirect.com ScienceD rect Available online at www.sciencedirect.com ScienceDirect

www.elsevier.com/locate/procedia www.elsevier.com/locate/procedia

Procedia Structural Integrity 37 (2022) 250–256

© 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 Pedro Miguel Guimaraes Pires Moreira Abstract Hitherto, studies on impact by non-axisymmetric projectiles with high cross-sectional aspect ratios are limited, yet such cases may occur in a wide range of civil and military applications. A target response to projectiles with such geometry differs from that of the extensively studied case of impact with axisymmetric projectiles. The focus of this study is to examine the penetration capabilities of plate-like projectiles with various sharpness upon impact on thin metallic targets. To that end, attention is drawn to the projectile ’s geometrical parameters and their effect on penetration characteristics. An experimentally-validated model was developed within the finite-element-method (FEA) framework to study the projectile-induced fracture in the target and the projectile ’s velocity profiles, with the intention to better understand the occurring dissipation mechanisms and identify the contribution of key geometrical parameters. A change in the expected target ’s fracture response is reported, while the linear section of the projectile’s velocity drop is associated through a linear relationship with the half-cone angle of the projectile. The target showed decreased resistance upon impact by non-axisymmetric, high-aspect-ratio projectiles as compared to their axisymmetric equivalents. © 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 Pedro Miguel Guimaraes Pires Moreira Keywords: Thin Target, Non-axisymmetric Projectiles, Experimental Study, Numerical Analysis, Semi-analytical Model ICSI 2021 The 4th International Conference on Structural Integrity Effect of nose geometry on penetration capability of non axisymmetric thin projectiles Theodosios Stergiou a , Konstantinos P. Baxevanakis a, 0 F0 F *, Anish Roy a , Nickolay Sazhenkov b , Mikhail A. Nikhamkin b , Vadim V. Silberschmidt a a Wolfson School of Mechanical, Electrical and Manufacturing Engineering, Loughborough University, Leicestershire, LE11 3TU, UK b Aircraft Engines Department, Perm National Research Polytechnic University, Perm, Russia Abstract Hitherto, studies on impact by non-axisymmetric projectiles with high cross-sectional aspect ratios are limited, yet such cases may occur in a wi e range of civil a d military applications. A target response to projectiles with such geometry differs from that of the extensively studied case of impact with axisymmetric projectiles. The focus of this study is to examine the penetration capabilities of plate-like projectiles with various sharpness upon impact on thin metallic targets. To that e d, attention is drawn to the projectile ’s geometrical parameters and their effect on penetration char cteristics. An experimentally-validated model was developed within the finite-element-method (FEA) framework to study the projectile-induc d fracture in the target and the projectile ’s velocity profil s, with the intention to better understand the occurring dissipation mechanisms and identify t contribution of key geometrical parameters. A change in the expected target ’s fracture response is reported, while the linear section of the projectile’s vel city drop is associated t rough a linear relationship with the half-con angle of the projectile. The target showed decreased r sistance u on impact by non-axisymm tric, high-aspect-ratio projectiles as compared to th ir axisymmetric equivalents. © 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 Pedro Miguel Guimara s Pires Moreira Keywords: Thin Target, Non-axisymmetric Projectiles, Experimental Study, Numerical Analysis, Semi-analytical Model ICSI 2021 The 4th International Conference on Structural Integrity Effect of nose geometry on penetration capability of non axisymmetric thin projectiles Theodosios Stergiou a , Konstantinos P. Baxevanakis a, 0 F0 F *, Anish Roy a , Nickolay Sazhenkov b , Mikhail A. Nikhamkin b , Vadim V. Silberschmidt a a Wolfson School of Mechanical, Electrical and Manufacturing Engineering, Loughborough University, Leicestershire, LE11 3TU, UK b Aircraft Engines Department, Perm National Research Polytechnic University, Perm, Russia

* Corresponding author. Tel.: +44 (0) 1509 227030; fax: +44 (0) 1509 227648. E-mail address: K.Baxevanakis@lboro.ac.uk * Corresponding author. Tel.: +44 (0) 1509 227030; fax: +44 (0) 1509 227648. E-mail address: K.Baxevanakis@lboro.ac.uk

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 Pedro Miguel Guimaraes Pires Moreira 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 Pedro Miguel Guimaraes Pires Moreira

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 Pedro Miguel Guimaraes Pires Moreira 10.1016/j.prostr.2022.01.081