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Effect of Time-Real Marine Environment Exposure on the Mechanical Behavior of FRP Composites

Author

Listed:
  • Goran Vizentin

    (Marine Engineering Department, Faculty of Maritime Studies, University of Rijeka, 51000 Rijeka, Croatia
    Center for Marine Technologies, Faculty of Maritime Studies, University of Rijeka, 51000 Rijeka, Croatia)

  • Darko Glujić

    (Marine Engineering Department, Faculty of Maritime Studies, University of Rijeka, 51000 Rijeka, Croatia)

  • Vedrana Špada

    (Materials Research Center Metris, Istrian University of Applied Sciences, 52100 Pula, Croatia)

Abstract

Fiber reinforced polymer (FRP) composites coupons were exposed to real sea environment to assess the influence on the mechanical behavior of composite materials used in the construction of marine structures. Real-life sea environment conditions were opted for instead of the more common simulated and laboratory versions of seawater in the attempt to obtain more realistic structural modeling environmental input design parameters for marine structures. Exposure was performed over prolonged time span instead of the usual accelerated tests. Epoxy and polyester resins, reinforced with glass fibers in three fiber layout configurations, were used to manufacture standardized tensile testing coupons. Mass changes due to seawater absorption, microorganism growth, changes in tensile strength (standard tensile tests), and surface morphology of the coupons were evaluated after 6- and 12-month long periods of submersion in the sea in the Rijeka bay, Croatia. All specimens showed mass increase due to water absorption and growth of attached algae and sea microorganisms. Various levels of reduction in tensile strength, depending on the fiber layout configurations, were observed. Significant changes in the matrix material structure were noticed, effectively producing “voids”. Based on these results, sustainability of FRP composites in marine environment is addressed and discussed.

Suggested Citation

  • Goran Vizentin & Darko Glujić & Vedrana Špada, 2021. "Effect of Time-Real Marine Environment Exposure on the Mechanical Behavior of FRP Composites," Sustainability, MDPI, vol. 13(17), pages 1-20, September.
    • Handle: RePEc:gam:jsusta:v:13:y:2021:i:17:p:9934-:d:628934
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    References listed on IDEAS

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