PSI - Issue 28

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 28 (2020) 1258–1266

© 2020 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 European Structural Integrity Society (ESIS) ExCo Abstract Polyurea elastomer exhibits desirable characteristics for impact mitigation, with varying stoichiometric-dependent properties that can be tailored for specific applications and applied to reinforce existing and new structural components. This numerical study aims to investigate the ballistic performance of polyurea-aluminium laminate targets, employing a user-defined material model for polyurea elastomer developed in a finite-element (FE) framework. The model consists of a rigid spherical projectile impacting the considered target plate. A linear increase in the ballistic performance with a growing thickness of polymer coating was observed and is consistent with previously conducted experimental work. The ballistic limit is increased by some 5% per millimetre of polymer coating thickness, when compared to the monolithic metallic plate. The presence of the polymer layer significantly affects the dynamic response mechanisms of the component during bending due to impact. The result is a more localised deformation compared to global bending of the target. © 2020 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 European Structural Integrity Society (ESIS) ExCo Keywords: Polyurea; Impact; Numerical Analysis; Finite Element Analysis; Laminates 1st Virtual European Conference on Fracture Ballistic performance of polyurea-coated thin aluminium plates: numerical study Theodosios Stergiou a , Konstantinos P. Baxevanakis a, *, 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 Polyurea elastomer exhibits desirable characteristics for impact mitigation, with varying stoichiometric-dependent properties that can be tailored for specific applications and applied to reinforce existing and new structural c ponents. This numerical study aims to investigate the ballistic performance of polyurea-aluminium laminate targets, employing a user-defined material model for polyurea elastomer developed in a finite-el ment (FE) framework. The mod l consists of a rigid spherical projectile impacting the c nsid red target plate. A linear increase in the ballistic performance with a gr wing thickness of polymer coating was observed and is consistent with previously conducted experimental work. The ballistic limit is increased by so e 5% per millimetre of polymer coating thickness, when compared to the monolithic metallic plate. The presence of the polymer layer significantly aff cts the dynamic response mechanisms of the component during bending du to impact. The result is a more localised deformation compared to global b nding of the target. © 2020 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 European Structural Integrity Society (ESIS) ExCo Keywords: Polyurea; Impact; Numerical Analysis; Finite Element Analysis; Laminates 1st Virtual European Conference on Fracture Ballistic performance of polyurea-coated thin aluminium plates: numerical study Theodosios Stergiou a , Konstantinos P. Baxevanakis a, *, 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 © 2020 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 European Structural Integrity Society (ESIS) ExCo 2452-3216 © 2020 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 European Structural Integrity Society (ESIS) ExCo

2452-3216 © 2020 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 European Structural Integrity Society (ESIS) ExCo 10.1016/j.prostr.2020.11.107