Prediction of the Deterioration of FRP Composite Properties Induced by Marine Environments

Vizentin, Goran; Vukelić, Goran

doi:10.3390/jmse10040510

Cited by 3 publications

(1 citation statement)

References 41 publications

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“…Finally, design equations for the shear strength of FCCC-Rs were proposed. It is worth mentioning that FRP composite pipes have excellent corrosion resistance, so they can be applied to marine structures or saline-alkali areas subject to long-term sulfate attacks to improve their durability [25,26]. For example, the strength retention rate of GFRP bars after 100 years of service in a salt solution with an annual mean temperature of 32 • C will still be higher than 82% [27].…”

Section: Introductionmentioning

confidence: 99%

Research on Hysteretic Behavior of FRP-Confined Concrete Core-Encased Rebar

Mou

Wang

et al. 2023

Polymers

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FRP-confined concrete core-encased rebar (FCCC-R) is a novel composite structure that has recently been proposed to effectively delay the buckling of ordinary rebar and enhance its mechanical properties by utilizing high-strength mortar or concrete and an FRP strip to confine the core. The purpose of this study was to study the hysteretic behavior of FCCC-R specimens under cyclic loading. Different cyclic loading systems were applied to the specimens and the resulting test data were analyzed and compared, in addition to revealing the mechanism of elongation and mechanical properties of the specimens under the different loading systems. Furthermore, finite-element simulation was performed for different FCCC-Rs using the ABAQUS software. The finite-element model was also used for the expansion parameter studies to analyze the effects of different influencing factors, including the different winding layers, winding angles of the GFRP strips, and the rebar-position eccentricity, on the hysteretic properties of FCCC-R. The test result indicates that FCCC-R exhibits superior hysteretic properties in terms of maximum compressive bearing capacity, maximum strain value, fracture stress, and envelope area of the hysteresis loop when compared to ordinary rebar. The hysteretic performance of FCCC-R increases as the slenderness ratio is increased from 10.9 to 24.5 and the constraint diameter is increased from 30 mm to 50 mm, respectively. Under the two cyclic loading systems, the elongation of the FCCC-R specimens is greater than that of ordinary rebar specimens with the same slenderness ratio. For different slenderness ratios, the range of maximum elongation improvement is about 10% to 25%, though there is still a large discrepancy compared to the elongation of ordinary rebar under monotonic tension. Despite the maximum compressive bearing capacity of FCCC-R is improved under cyclic loading, the internal rebars are more prone to buckling. The results of the finite-element simulation are in good agreement with the experimental results. According to the study of expansion parameters, it is found that the hysteretic properties of FCCC-R increase as the number of winding layers (one, three, and five layers) and winding angles (30°, 45°, and 60°) in the GFRP strips increase, while they decrease as the rebar-position eccentricity (0.15, 0.22, and 0.30) increases.

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Section: Introductionmentioning

confidence: 99%

Research on Hysteretic Behavior of FRP-Confined Concrete Core-Encased Rebar

Mou

Wang

et al. 2023

Polymers

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Artificial neural networks for fatigue life estimation of glass-carbon/epoxy hybrid composites

Kumar,

Bongale

2024

Int J Interact Des Manuf

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Strength assessment of fiberglass layer configurations in FRP ship materials from yard practices using a statistical approach

Ismail,

Ma’ruf,

Zubaydi

et al. 2024

Curved and Layered Structures

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Fiberglass Reinforced Polymer (FRP) is a type of composite extensively used in small boats in Indonesia. Most FRP research focuses on general applications and research on FRP materials is not aligned with actual yard practices in lamination. This study examined the mechanical characteristics of marine-grade FRP composites applied to ships, considering fiberglass layer configurations that conform to yard practices and their compliance analysis with several international classification rules. Samples from Bojonegara and Makassar 3 met the criteria of the Indonesian Classification Bureau, Korean Register, and American Bureau of Shipping rules for tensile and bending strength and have the best specific strength. Analysis of Variance showed that the differences in fiberglass layer configurations had a significant impact on tensile and bending strength. Grouping using Tukey Simultaneous Tests indicated that samples with four or five layers showed tensile and bending strength that were not significantly different statistically. The Unsaturated Polyester Resin brand had a considerable impact on tensile strength but a less pronounced effect on bending strength. Sample Bojonegara and Makassar 3 can be recommended for practitioners in FRP shipyards as they have met the requirements of international regulations.

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Prediction of the Deterioration of FRP Composite Properties Induced by Marine Environments

Cited by 3 publications

References 41 publications

Research on Hysteretic Behavior of FRP-Confined Concrete Core-Encased Rebar

Research on Hysteretic Behavior of FRP-Confined Concrete Core-Encased Rebar

Artificial neural networks for fatigue life estimation of glass-carbon/epoxy hybrid composites

Strength assessment of fiberglass layer configurations in FRP ship materials from yard practices using a statistical approach

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