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) 314–320

© 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 Soft plasma-treated polymers have good prospects in the creation of biomedical products. Their application is associated with cyclic mechanical loads. The practical applicability of such coatings is unclear without investigating the effect of deformation on the structure of modified surfaces. Elastic polyurethane (synthetic two-phase polymer) was used in this work. Its surface was preliminarily cleaned from low-molecular fractions by argon plasma and then treated by plasma chemical decomposition of acetylene in argon plasma for 30...120 s. The structural and mechanical inhomogeneities of the obtained carbon-containing nanocoatings depend on the treatment time and were caused by the composition of the initial substrate. Uniaxial fatigue loading leads to the formation of transverse folds on the coatings in the unloaded state (a result of elastic-plastic deformation of the coating); under tension these folds are open and form local nanocracks. One of the variants of plasma modification did not give the formation of cracks; it is associated with the areas with a pronounced stiffness contrast of this coating. © 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. Keywords: polyurethane; plasma; surface; deformation 15th International Conference on Mechanics, Resource and Diagnostics of Materials and Stru tures Impact of fatigue loading on the surface of polyurethane treated in argon and acetylene plasma I.A. Morozov a,b, *, A.S. Kamenetskikh c , A.Y. Beliaev a , R.I. Izumov a , M.V. Bannikov a a Institute of Continuous Media Mechanics UB RAS, Academika Koroleva st. 1, 614013, Perm, Russia b Perm State University, Bukireva st. 15, 614990, P rm, Russia c Institute of El ctrophysics UB RAS, Amundsen st. 106, 62 016, Ekaterinburg, Russia Abstract Soft plasma-treated polymers have good prospects in the creation of biomedical products. Their application is associated with cyclic mechanical loads. The pr ctical applicability of such co ngs is uncl ar without investigating the effect of def rmation on the structure of modified surfaces. E astic polyurethane (synthetic two-phase polymer) was used in this work. Its surf ce was pr liminarily cleaned from low-molecular fractions by argon plasma and then treated by plasma chemical decomposition of ac tyle e n argo plasma f r 30...120 s. The structural and mech nical inhomogeneities of the obtained carb n-c n ai ing nanocoatings depend on the treatment time and were caused by th composition of the in tial substrate. U iaxial fatigue load le ds to the formation of transverse folds o the coatings in the unloaded state (a r sul of ela ic-plastic deformation of the coating); under tensi these folds are open and form local nanocracks. One of the varian s of plasma modificati n did ot giv the formation of cracks; it i associated with the areas with a pronounced stiffness contrast of this coating. © 2022 The Authors. Publ hed 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 re ponsibility of scientific committe of the15th International C ference o Mechanics, Resource and Diagnostics of Materials and S ructur s. Keywords: polyurethane; plasma; surface; deformation 15th International Conference on Mechanics, Resource and Diagnostics of Materials and Structures Impact of fatigue loading on the surface of polyurethane treated in argon and acetylene plasma I.A. Morozov a,b, *, A.S. Kamenetskikh c , A.Y. Beliaev a , R.I. Izumov a , M.V. Bannikov a a Institute of Continuous Media Mechanics UB RAS, Academika Koroleva st. 1, 614013, Perm, Russia b Perm State University, Bukireva st. 15, 614990, Perm, Russia c Institute of Electrophysics UB RAS, Amundsen st. 106, 620016, Ekaterinburg, Russia

* Corresponding author. Tel.: +7-342-237-8315; fax: +7-342-237-8487. E-mail address: ilya.morozov@gmail.com * Corresponding author. Tel.: +7-342-237-8315; fax: +7-342-237-8487. E-mail address: ilya.morozov@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.2022.04.041