PSI - Issue 30

ScienceDirect Available online at www.sciencedirect.com Sci nceDirect Structural Integrity Procedia 00 (2020) 000–000 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2020) 000–000 Available online at www.sciencedirect.com

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

Procedia Structural Integrity 30 (2020) 76–81

© 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 EURASTRENCOLD - 2020 guest editors Abstract The effects of temperature and moisture on the properties of polymer composite materials in cold climates have been considered. A review and analysis of changes in the mechanical properties of polymer composite materials under the influence of temperature and moisture are carried out with reference to foreign and Russian scientific literature. Examples are revealed that show that the deterioration of the mechanical parameters of polymeric composition materials after exposure at open stands in a moderately cold, cold, and extremely cold climate is comparable or even more significant than after staying in warm and humid regions. The mechanism of aging of polymeric composition materials in cold climates has been substantiated and the conditions under which their mechanical properties deteriorate more significantly than when exposed in dry and humid tropics and subtropics have been substantiated. Composites develop internal stresses, caused by unequal thermal expansion of reinforcement fibers and polymer matrices. The internal stresses cause an occurrence of micro-cracks, their coalescence, and the formation of macro-damages in the bulk of a binder or at the interface with fibers. © 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 EURASTRENCOLD - 2020 guest editors Keywords: polymer composite materials; cold climate, thermal cycles;internal stresses; micro-cracks; strength. 1. Introduction PCM based on glass, carbon, basalt, organic, and other fibers, used in various branches of mechanical engineering, have a high strength in works by Kablov and Startsev (2020, 2012), which decreases over time due to IX Eurasian Symposium on the problems of strength and resource in low climatic temperatures (EURASTRENCOLD-2020) Effects of cold climates on polymer composite material properties M.P. Lebedev a , O.V. Startsev a , A.K. Kychkin b, * V.V. Polyakov c a Federal Research Centre “The Yakut Scientific Centre of the Siberian Branch of the Russian Academy of Sciences”, Petrovskogo St. 2,Yakutsk 677000, Russia b Larionov Institute of Physical-Technical Problems of the North, SB RAS, Oktyabrskaya St.1, Yakutsk 677980, Russia c Altai State University, Pr.Lenina 61, Barnaul, 656049, Russia Abstract The effects of temperature and moisture on the properties of polymer composite materials in cold climates have been considered. A r vi w and analysis of changes in the mechanical properties of lymer composite materials under the influence of temperature and moisture are c rri d out with referen e to f r ign and Russian scientific literature. Examples ar revealed that show that the eterioration of the mechanical parameters f polymeric composition materials fter exposure at open st nds in a m derately cold, cold, and extremely cold lim te is comparab e or even ore s g ificant than after staying in warm and humid regions. The mechanism of aging of polymeric composition materials i cold climates has been substantiated and the conditions under which their mechanical pr perties deteriorate m re significantly than wh n expos d in dry and humid tropics a d subtropics have been substantiated. Composites develop int rnal stresses, caused by un qual thermal exp sion of reinfor ement fi e s and polym r matrices. Th internal tr ses cause an occurrenc of micro-cracks, their coalescence, and the formation of macro-damages in the bulk of a bind r or at the interfac with fibe s. © 2020 The Authors. P blished y 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 EURASTRENCOLD - 2020 guest editors Keywords: polymer composite materials; cold climate, thermal cycles;internal stresses; micro-cracks; strength. 1. Introduction PCM based on glass, carbon, basalt, organic, and other fibers, used in various branches of mechanical engineering, have a high strength in works by Kablov and Sta tsev (2020, 2012), wh ch decreases over time due to IX Eurasian Symposium on the problems of strength and resource in low climatic temperatures (EURASTRENCOLD-2020) Effects of cold climates on polymer composite material properties M.P. Lebedev a , O.V. Startsev a , A.K. Kychkin b, * V.V. Polyakov c a Federal Research Centre “The Yakut Scientific Centre of the Siberian Branch of the Russian Academy of Sciences”, Petrovskogo St. 2,Yakutsk 677000, Russia b Larionov Institute of Physical-Technical Problems of the North, SB RAS, Oktyabrskaya St.1, Yakutsk 677980, Russia c Altai State University, Pr.Lenina 61, Barnaul, 656049, Russia

* Corresponding author. Tel.:+7-914-225-35-97 E-mail address: kychkinplasma@mail.ru * Corresponding author. Tel.:+7-914-225-35-97 E-mail address: kychkinplasma@mail.ru

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 the responsibility of the EURASTRENCOLD - 2020 guest editors 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 the responsibility of the EURASTRENCOLD - 2020 guest editors

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 EURASTRENCOLD - 2020 guest editors 10.1016/j.prostr.2020.12.013