PSI - Issue 32

Available online at www.sciencedirect.com Available online at www.sciencedirect.com Sci nceDirect Structural Integrity Procedia 00 (2021) 000 – 000 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2021) 000 – 000

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Procedia Structural Integrity 32 (2021) 137–143

© 2021 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 the XXIIth Winter School on Continuous Media Mechanics” Abstract The mechanical properties of elastomeric composites along different loading directions are known to depend on their production technology (initial anisotropy) and on the loading history (induced anisotropy). It is also obvious that the geometry of the filler and its concentration in the matrix should have an effect on the formation of both the initial anisotropy in composites and the strain-induced anisotropy. In this study, the behavior of polymer composites was investigated depending on the type of filler particles (granular - carbon black, nanodiamonds; layered - graphene; fibrous - single-walled and multi-walled nanotubes). In the experiments, materials with different filler concentrations and with varying combinations of fillers were tested. Analysis of the results has revealed that the formation of the initial anisotropy is determined not only by the shape of the filler particles but also by their structure. It is shown that the induced anisotropy is clearly manifested itself in high-filled systems, but the way of its formation in composites strongly depends on the type of filler. © 2021 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 the XXIIth Winter School on Continuous Media Mechanics” Keywords: elastomeric nanocomposites; mechanical properties; initial anisotropy; induced anisotropy 1. Introduction The anisotropy of the mechanical properties of composites, often referred to as the “initial” anisotropy, is specially formed during the development of composites; it indicates the structure of the material. In elastomers, this phenomenon is undesirable due to production difficulties (it is impossible to uniformly orient the particles throughout the material) and due to the complications associated with its mathematical modeling. The initial XXIIth Winter School on Continuous Media Mechanics Formation of anisotropic properties in elastomeric nanocomposites Kseniia A. Mokhireva a, *, Alexander L. Svistkov a , Vladimir V. Shadrin a,b a Institute of Continuous Media Mechanics UB RAS, Ak. Koroleva St. 1, Perm 614013, Russia b Perm Stat University, Bukireva St. 15, Pe m 614990, Russia Abstract The mechanical properties of elastomeric composites along different loading directions are known to depend on their production technology (initial anisotropy) nd on the l ading history (induced anisotropy). It s also obvi us hat th ge metry of the filler and its conce tr tio in he matrix should h ve an effect o the formation of both the initial anisotropy in co posites and the strain-indu d anis tropy. In this study, the b h vior of polymer co p sites was investig ted depending on the typ of filler part cles (granular - carbon black, nanodiamonds; layered - graphene; fibrous - single-walled and multi-walled nano ub s). In the experiments, materials with different filler c centrations and with varying combinations of fillers were tested. Analysis of results has reve l d that the formation of the i itial nisotropy is determi ed not o ly by the shape of th fill r partic e but also by their structure. It is shown th the induced anisotropy is clearly ma ifested itself in igh-fill d systems, but he way of its format on in omposites stro gly depends on the type of filler. © 2021 The Author . 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 h scientific committe of the XXIIth Winter School on Continuous Media Mechanics” Keywords: elastomeric nanocomposites; mechanical properties; initial anisotropy; induced anisotr py 1. Introduction The anisotropy of the mechanical properties of composites, often referred to as the “initial” anisotropy, is specially formed during the d velopment f composites; it indicates the structure of the mater al. In el stomers, th ph nomen n is undesirable due to produ tion difficul ies (it i impossible t uniformly orient the particle t roughout the material) and due to the complications associated with its mathematical m d ling. The initial XXIIth Winter School on Continuous Media Mechanics Formation of anisotropic properties in elastomeric nanocomposites Kseniia A. Mokhireva a, *, Alexander L. Svistkov a , Vladimir V. Shadrin a,b a Institute of Continuous Media Mechanics UB RAS, Ak. Koroleva St. 1, Perm 614013, Russia b Perm State University, Bukireva St. 15, Perm 614990, Russia

* Corresponding author. Tel.: +7-922-306-40-28. E-mail address: lyadovaka@icmm.ru * Corresponding author. Tel.: +7-922-306-40-28. E-mail address: lyadovaka@icmm.ru

2452-3216 © 2021 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 the XXIIth Winter School on Continuous Media Mechanics” 2452-3216 © 2021 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 the XXIIth Winter School on Continuous Media Mechanics”

2452-3216 © 2021 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 the XXIIth Winter School on Continuous Media Mechanics” 10.1016/j.prostr.2021.09.020