EFFECTS OF MOISTURE ON CARBON FABRIC AND GLASS FABRIC REINFORCED EPOXY PLASTICS AFTER EXPOSURE TO A COLD CLIMATE ZONE
CKXJUS
DOI:
https://doi.org/10.25712/ASTU.2072-8921.2025.04.041Keywords:
glass fabric, carbon fabric, diffusion coefficient, plasticization, structural relaxation, aging, initial nonequilibrium structure, three-point bending strength, tensile strengthAbstract
In areas with extreme climatic conditions, the service life of polymer composite products is more dependent on ageing and corrosion processes than mechanical impact. Since moisture is one of the main factors of aging, the study of the effect of moisture on exposed structural polymeric materials is most important for understanding their aging processes, including on exposed glass fabric and carbon fabric reinforced epoxy plastics (GFRP-CFRP hybrids). Using infrared spectroscopy, it was established that there is no chemical interaction of the binder based on ED-20 with moisture. The introduction of glass fabric into the epoxy binder leads to the interaction of the surface hydroxyls of the glass fiber with the epoxy groups of the resin, increasing the number of polar groups (R-OH) and the initial nonequilibrium state in the GFRP-CFRP hybrids. For this reason, after a cycle of moisture sorption and desorption, irreversible changes in the three-point bending strength and tensile strength of the GFRP-CFRP hybrids are established: a decrease in their values, while the values of the tensile and bending strength of the CFRP remained at the same level. The result of comparing the diffusion coefficients during sorption and desorption of moisture of GFRP-CFRP hybrids before and after exposure to a cold climate zone is the justification of the relaxation of the initial nonequilibrium structure of GFRP-CFRP hybrid exposed to a cold climate zone. After exposure for 12 months in a cold climate zone, a reversible effect of the plasticizing effect of moisture on the three-point bending strength and tensile strength of the studied the GFRP-CFRP hybrids was revealed. Thus, in the summer period, the daily cycles of moisture sorption and desorption do not affect the mechanical properties of the studied the GFRP-CFRP hybrids.
References
Pandya K. S., Veerraju C., Naik N. K. Hybrid composites made of carbon and glass woven fabrics under quasistatic loading // Materials & Design. 2011. Vol. 32, №1. P. 4094–4099. DOI: 10.1016/j.matdes.2011.03.003.
Three-dimensional porosity characterization in carbon/glass fiber epoxy hybrid composites / F.M. Mon-ticeli [et al.] // Composites: Part A. 2019. Vol. 125, №. 1. P. 105555. DOI: 10.1016/j.compositesa.2019.105555.
Swolfs Y., Gorbatikh L., Verpoest I. Fibre hybrid-isation in polymer composites: A review // Composites: Part A. 2014. Vol. 67, №1. P. 181–200. DOI: 2004.10.1016/j.compositesa.2014.08.027.
Zhang J., Chaisombat K., He S., Wang C. H. Hybrid composite laminates reinforced with glass/carbon woven fabrics for lightweight load bearing structures // Materials & Design. 2012. Vol. 36, №1. P. 75-80. DOI: 10.1016/j.matdes.2011.11.006.
Layer-wise damage prediction in car-bon/Kevlar/S-glass/E-glass fibre reinforced epoxy hy-brid composites under low-velocity impact loading using advanced 3D computed tomography / A. Vasudevan [et al.]. // Int. J. Crashworthiness. 2019. Vol. 1, №1. P. 1–15. DOI: 10.1080/13588265.2018.1511234.
Environmental stability of GFRP laminated composites: an emphasis on mechanical behaviour / G. Mishra [et al.]. // Aircraft Engineering and Aerospace Technology. 2010. Vol. 82, №4, P. 258–266. doi:10.1108/00022661011082731.
Sugita Y., Winkelmann Ch., La S.V. Environ-mental and chemical degradation of carbon/epoxy lap joints for aerospace applications, and effects on their mechanical performance // Compos. Sci. and Technol. 2010. Vol. 70, №5. P. 829–839. doi: 10.1016/j.compscitech.2010.01.021
Evaluation of structural changes in epoxy sys-tems by moisture sorption-desorption and dynamic mechanical studies / W.J. Mikols [et al.]. // Polymer Composites. 1982. Vol. 3, №3. P. 118–124. doi:10.1002/pc.750030304.
Климатическое старение композиционных материалов авиационного назначения. I. Механизмы старения / Е.Н. Каблов [и др.]. // Деформация и разрушение материалов. 2010. №11. С. 19-27.
Климатическое старение композиционных материалов авиационного назначения. II. Релаксация исходной структурной неравновесности и градиент свойств но толщине / Е.Н. Каблов [и др.]. // Деформация и разрушение материалов. 2010. №12. С. 40-46.
Роуленд С. Вода в полимерах. М.: Мир, 1984. 555 с.
Каблов Е.Н., Старцев В.О., Лаптев А.Б. Старение полимерных композиционных материалов : учебное пособие. Москва : НИЦ «Курчатовский институт», 2023. 520 с.
Структура и свойства воды, облученной СВЧ излучением / В.Ф. Мышкин [и др.] // Научный журнал КубГАУ. 2012. №81(07). URL: https://cyberleninka.ru/article/n/struktura-i-svoystva-vody-obluchennoy-svch-izlucheniem (дата обращения: 02.04.2025).
Комплексное исследование воздействия климатических и эксплуатационных факторов на новое поколение эпоксидного связующего и полимерных композиционных материалов на его основе часть 1. Исследование влияния сорбированной влаги на эпоксидную матрицу и углепластик на ее основе / Е. В. Николаев [и др.] // Труды ВИАМ. 2015. №12. С. 86–99. doi:10.18577/2307-6046-2015-0-12-11-11.
Startsev O.V., Krotov A.S., Mashinskaya G.P. Climatic ageing of organic fiber reinforced plastics: water effect // International Journal of Polymeric Materials. 1997. Vol. 37, №. 3–4. P. 161–171. doi: 10.1080/00914039708031483.
Старцев В.О. Климатическая стойкость полимерных композиционных материалов и защитных покрытий в умеренно-теплом климате: дис. д-р. техн. наук. Москва, 2018. 308 с.
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