Assessment of performance degradation of hybrid flax-glass fiber reinforced epoxy composites during a salt spray fog/dry aging cycle

Fiore, Vincenzo; Calabrese, Luigi; Miranda, R.; Badagliacco, Dionisio; Sanfilippo, Carmelo; Palamara, Davide; Valenza, A.; Proverbio, E.

doi:10.1016/j.compositesb.2022.109897

Cited by 19 publications

(14 citation statements)

References 51 publications

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“…This local velocity variation is exacerbated by the capillary effect, prevailing at the micro-scale. The values found in the present work are higher than those of Fiore and co-workers [ 37 ], but it must be taken into account that the resin and the fabric architecture were very different.…”

Section: Resultscontrasting

confidence: 86%

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Experimental Investigation on the Mechanical and Physical Properties of Glass/Jute Hybrid Laminates

et al. 2022

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Natural fibres have been partly substituting synthetic fibres in polymer composites due to their renewable character and many other advantages, and sometimes, they can be hybridized into a single composite for a better combination of properties. This work aims to study the effect of hybridization and stacking sequence on the mechanical and physical properties of the glass/jute laminates. For that, pure jute, pure glass and glass/jute hybrids were manufactured by vacuum infusion process using orthophthalic polyester resin. The composites were characterized via C-scan analysis, density, volume fraction of constituents and optical microscopy analyses. Mechanical properties were obtained from tensile, compression and shear tests. The longitudinal properties were higher than transverse properties for all laminates. The hybrids presented intermediate density and mechanical properties compared to pure glass and pure jute laminates. The hybrids produced similar density and tensile modulus, but with small differences in tensile strength and compressive strength which were justified based on variations in resin and void content due to the influence of the stacking sequence (glass/jute interlayer regions). In addition, the pure glass and the hybrid laminates displayed acceptable failure morphology in the in-plane shear test, but not the pure jute laminate.

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Section: Resultscontrasting

confidence: 86%

“…Fiore and co-workers [ 37 ] investigated the void content for hybrid composite manufactured by vacuum infusion process with woven flax and woven glass fabrics and epoxy resin. The flax fabrics were in the middle of the laminate and the glass fabrics as the outer layers, and the void content found was 6.1%.…”

Section: Resultsmentioning

confidence: 99%

Experimental Investigation on the Mechanical and Physical Properties of Glass/Jute Hybrid Laminates

et al. 2022

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“…This can indicate the energy required by the natural fiber composite laminate for breaking. As is widely known, the toughness (i.e., the amount of energy that the natural fiber composite laminate can absorb to reach its breaking condition) is proportional to the area under the flexural stress-strain curve These findings indicate that the natural fiber-reinforced composite shows irreversible softening degradative phenomena, which affect its strength and stiffness in different ways [28].…”

Section: Toughness Mapmentioning

confidence: 92%

“…These findings indicate that the natural fiber-reinforced composite shows irreversible softening degradative phenomena, which affect its strength and stiffness in different ways [28].…”

Section: Quasi-static Mechanical Testsmentioning

confidence: 95%

Performances Recovery of Flax Fiber Reinforced Composites after Salt-Fog Aging Test

Calabrese

Fiore²,

Miranda³

et al. 2022

J. Compos. Sci.

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In the present paper, the performance recovery under conditions of discontinuous exposure to a marine environment of a natural fiber-reinforced composite (NFRC) reinforced by flax fibers was assessed. In particular, this laminate was initially exposed to salt-fog for 15 and 30 days, and then stored in a controlled air condition for up to 21 days. The flax fiber-reinforced composite showed coupled reversible and irreversible aging phenomena during the wet stage, as well as evidencing a significant mechanical recovery during the dry stage. Unlike the stiffness, the laminate showed a noticeable recovery of its flexural strength. This behavior affected the composite material toughness. A simplified approach was applied to define a topological map of the material toughness at varying drying times. The results highlight that the composite shows maximum toughness at intermediate drying times thanks to the strength recovery, in addition to its residual plasticity. This approach allows us to better determine that the strength is more closely related to reversible degradation phenomena, whereas the stiffness is mainly correlated to irreversible ones, implying relevant effects on the toughness of the composite exposed to a wet/dry cycle.

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“…Artificially accelerated seawater aging tests usually include high-temperature accelerated aging, 43,44,50 salt-spray aging, 50,66–70 humidity and heat aging, 71 pressurized aging, 72,73 and other methods, among which high-temperature accelerated aging and salt-spray aging are the most common. High-temperature accelerated aging usually involves immersing the sample in a tank filled with artificial seawater to accelerate the aging of the composite, whereas salt-spray aging is usually performed in an aging chamber to increase the salinity of the composite.…”

Section: Research Approaches For Accelerated Aging and Life Predictio...mentioning

confidence: 99%

Seawater aging effect on fiber-reinforced polymer composites: Mechanical properties, aging mechanism, and life prediction

Nan

Zhi

Meng

et al. 2023

Textile Research Journal

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Fiber-reinforced polymer (FRP) composites are widely used in marine engineering fields, such as coastal construction, offshore bridges, submarines, and warships, owing to their light weight, high strength, and corrosion resistance. However, owing to the harsh marine environment, FRP composites used in the ocean are inevitably affected by seawater aging. Therefore, it is necessary to investigate the seawater aging properties of FRP composites. In this study, the seawater aging mechanism of FRP composites is summarized, and the influence factors (matrix type, fiber type, immersion temperature, loading mode, and aging method) of seawater aging on the mechanical properties of FRP composites are further reviewed in detail. Based on this, the method for improving the seawater resistance of FRP composites is summarized. In addition, the research schemes of accelerated aging of FRP composites and commonly used life prediction models are summarized, and the methods and suggestions for improving the accuracy of life prediction are further discussed.

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Assessment of performance degradation of hybrid flax-glass fiber reinforced epoxy composites during a salt spray fog/dry aging cycle

Cited by 19 publications

References 51 publications

Experimental Investigation on the Mechanical and Physical Properties of Glass/Jute Hybrid Laminates

Experimental Investigation on the Mechanical and Physical Properties of Glass/Jute Hybrid Laminates

Performances Recovery of Flax Fiber Reinforced Composites after Salt-Fog Aging Test

Seawater aging effect on fiber-reinforced polymer composites: Mechanical properties, aging mechanism, and life prediction

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