PSI - Issue 20

Available online at www.sciencedirect.com Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2018) 000 – 000 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2018) 000 – 000

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

ScienceDirect

Procedia Structural Integrity 20 (2019) 81–86

1st International Conference on Integrity and Lifetime in Extreme Environment (ILEE-2019) Development of climatic tests of polymer materials for extreme operating conditions M.P. Lebedev, O.V. Startsev, A.K. Kychkin* V.P. Larionov Institute of Physical and Technical Problems of the North, Siberian Branch, Russian Academy of Sciences, 1 Oktyabrskaya str., Yakutsk 677980, Russia Abstract A review and analysis of changes in the mechanical properties of polymer composite materials (PCM) under natural climate tests based on foreign and domestic sources have been performed. Methodical features of measurements of mechanical parameters of PM and PCM are discussed to increase the reliability of estimates of their performance at the early stages of aging. To improve reliability of determination of mechanical properties of PCM during climatic aging in the initial state and after the completion of the next stages of exposure, methodological requirements are recommended. The following requirements should be met: sample preparation in accordance with current standards and preliminary assessments of monitored parameters; check of the variation of indicators and calculation of the coefficient of variation to ensure the required accuracy; study of the strength characteristics (compression, bending, stretching) for several temperatures, including below and above the glass transition temperature of the polymer matrix; measurements of controlled parameters of samples in the state of delivery or the moment of removal, after compl ete drying and moistening at 60 ° C. Compliance with the requirements will determine the number of samples required, the shape and size of the samples, methods of securing the samples in the clamps, the cutting angle of the samples to the main reinforcement direction. 1st International Conference on Integrity and Lifetime in Extreme Environment (ILEE-2019) Development of climatic tests of polymer materials for extreme operating conditions M.P. Lebedev, O.V. Startsev, A.K. Kychkin* V.P. Larionov Institute of Physical and Technical Problems of the North, Siberian Branch, Russian Academy of Sciences, 1 Oktyabrskaya str., Yakutsk 677980, Russia Abstract A r view and a alysis f changes in the mechanical pr perties of polymer composite aterials (PCM) under natural cli ate tests based on foreign and domestic sources have been perf rmed. M th dical features of me surements of mechanical parameters of PM and PCM are discussed to incre se the reliability of estimates of their performa ce at the early stages of aging. To improve reliability of determination of mechanical properti s of PCM during climatic aging in the initial state a d after the co pletion of th next stages of exposure, methodological requirements are recommend d. The f llowing requirements should be met: sample preparation in accord nce with current standards nd preliminary assessments of monitored parameters; check of the variation of indicators a d calculation of the coefficient of variation to ensure the required accuracy; study of the strength ch racteristics (compression, bending, stretching) f r several temperatures, including below and above the glass transition temperature of the p lym r matrix; measurements of controlled parameters of samples in the state of deliv ry or the moment of removal, after compl ete drying and moistening at 60 ° C. Compliance with the requirements will determine the number of sa ples required, the shape and size of the samples, methods of securing the samples in the clamps, the cutting angle of the samples to the main reinforcement direction.

© 2019 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the ILEE-2019 organizers © 2019 The Author(s). Published by Elsevier B.V. Peer-review under responsibility of the ILEE-2019 organizers © 2019 The Author(s). Published by Elsevier B.V. Peer-review under responsibility of the ILEE-2019 organizers

Keywords: climatic tests; polymeric materials; aging; basalt plastic; coefficient; mechanical indicator. Keywords: climatic tests; polymeric materials; aging; basalt plastic; coefficient; mechanical indicator.

* Corresponding author. Tel.: 8-914-225-3597 E-mail address: kychkinplasma@mail.ru * Correspon ing author. Tel.: 8-914-225-3597 E-mail address: kychkinplasma@mail.ru

2452-3216 © 2019 The Author(s). Published by Elsevier B.V. Peer-review under responsibility of the ILEE-2019 organizers 2452 3216 © 2019 The Author(s). Publis ed by Elsevier B.V. Peer-review under responsibility of the ILEE-2019 organizers

2452-3216 © 2019 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the ILEE-2019 organizers 10.1016/j.prostr.2019.12.119