PSI - Issue 26

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

www.elsevier.com/locate/procedia

ScienceDirect

Procedia Structural Integrity 26 (2020) 256–262

© 2020 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) Peer-review under responsibility of MedFract1 organizers Abstract The paper presents in-depth analysis and modeling of processes of interaction of nanoparticles with micro cracks on a solid surface. The molecular dynamics method was used to simulate the processes of interaction of nanoparticles with a crack. The numerical simulation of the processes of dynamic interaction of nanoparticles and penetration of nanoparticles into the crack is performed. The results of numerical calculations and analyzes of the interaction of aluminum and copper nanoparticles with micro cracks in the aluminum and other materials are presented. It has been shown that nanoparticles form “bridge” structures connecting and fixing the surface of a crack. The formation of a “bridge” of nanoparticles leads to both complete overgrowth of the microcrack and its transformation into micropores, due to the restructuring of the structure of the nanosystem. A comparison is made of crack opening under load with and without nanoparticles. It has been established that cracks with nanoparticles inside require a large load for opening. In general, the presence of nanoparticles in a microcrack stabilizes and strengthens it. © 2020 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) he surface of a crack. The 1 st Mediterranean Conference on Fracture and Structural Integrity, MedFract1 Modeling of interaction nanoparticles with cracks on the surface of solids A. V. Vakhrushev a,b * a Department “Modeling and synthesis of technological structures”, Institute of Mechanics, Udmurt Federal Research Center, Ural Division, Russian Academy of Sciences, Baramzinoy 34, Izhevsk 426067, Russia b Department “Nanotechnology and Microsystems”, Kalashnikov Izhevsk State Technical University, Studencheska 7, Izhevsk 426069, Russia

Peer-review under responsibility of MedFract1 organizers Keywords: Nanoparticles; microcrack; molecular dynamics; modeling

* Corresponding author. Tel.: +7-912-466-80-29; fax:+9-341-250-79-59. E-mail address: Vakhrushev-a@yandex.ru

2452-3216 © 2020 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) Peer-review under responsibility of MedFract1 organizers

2452-3216 © 2020 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) Peer-review under responsibility of MedFract1 organizers 10.1016/j.prostr.2020.06.032