Fatigue Life Prediction of Bio-composites Subjected to Environmental Aging

Jeevi, G.; Karthikeyan, R.; Ranganathan, Nalini; Kader, M. Abdul; Nayak, Sanjay K.

doi:10.1007/978-981-16-8360-2_12

Cited by 2 publications

(3 citation statements)

References 63 publications

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“…When looking at the environmental fatigue of PMCs, another important factor to consider is photo-ageing, particularly UV ageing-under solar radiation, mostly UV-B (315-280 nm) [5]-or artificial light. This type of radiation is highly energetic, and thus, it may degrade the mechanical properties of a PMC over time, namely by photolysis, photocatalysis and/or photo-oxidation, the latter being the most prevalent one [26]. Naturally, since the UV photons must first be absorbed, if the matrix of a PMC is impervious to this radiation, no damage will occur [1].…”

Section: Uv Radiationmentioning

confidence: 99%

“…Additionally, one must account for the interaction between factors, such as the combination of air, as an oxidising agent, with solar radiation, which accelerates the surface corrosion [5], or even the dissociation of radicals from the highly reactive broken chains that may react, e.g., with water or oxygen in the air, to form corrosive environments, such as that of PVC into chlorine radicals which form hydrochloric acid (HCl), further embrittling the composite, reducing its mechanical strength and accelerating the removal of material [1,26]. This is especially important when assessing the fatigue and creep performance, as the embrittlement causes the matrix to break earlier on when loaded and, most importantly, affects the interface between reinforcement (especially for long fibres) and matrix, as the long chains therein break, propagating the crack through the several layers of the composite and reducing the anticipated failure stress [28].…”

Section: Uv Radiationmentioning

confidence: 99%

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Polymer-Matrix Composites: Characterising the Impact of Environmental Factors on Their Lifetime

Barreira-Pinto,

Carneiro,

Miranda

et al. 2023

Materials

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Polymer-matrix composites are widely used in engineering applications. Yet, environmental factors impact their macroscale fatigue and creep performances significantly, owing to several mechanisms acting at the microstructure level. Herein, we analyse the effects of water uptake that are responsible for swelling and, over time and in enough quantity, for hydrolysis. Seawater, due to a combination of high salinity and pressures, low temperature and biotic media present, also contributes to the acceleration of fatigue and creep damage. Similarly, other liquid corrosive agents penetrate into cracks induced by cyclic loading and cause dissolution of the resin and breakage of interfacial bonds. UV radiation either increases the crosslinking density or scissions chains, embrittling the surface layer of a given matrix. Temperature cycles close to the glass transition damage the fibre–matrix interface, promoting microcracking and hindering fatigue and creep performance. The microbial and enzymatic degradation of biopolymers is also studied, with the former responsible for metabolising specific matrices and changing their microstructure and/or chemical composition. The impact of these environmental factors is detailed for epoxy, vinyl ester and polyester (thermoset); polypropylene, polyamide and poly etheretherketone (thermoplastic); and for poly lactic acid, thermoplastic starch and polyhydroxyalkanoates (biopolymers). Overall, the environmental factors mentioned hamper the fatigue and creep performances, altering the mechanical properties of the composite or causing stress concentrations through microcracks, promoting earlier failure. Future studies should focus on other matrices beyond epoxy as well as on the development of standardised testing methods.

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Section: Uv Radiationmentioning

confidence: 99%

Section: Uv Radiationmentioning

confidence: 99%

Polymer-Matrix Composites: Characterising the Impact of Environmental Factors on Their Lifetime

Barreira-Pinto,

Carneiro,

Miranda

et al. 2023

Materials

View full text Add to dashboard Cite

show abstract

“…[14][15][16][17][18] In addition, some studies have been focused on the mechanical properties of basalt/glass fiber reinforced polymeric composites materials. [19][20][21][22][23] For example, the study carried out by Sapuan and colleagues in which the mechanical properties of longitudinal basalt/woven-glass-fiber-reinforced unsaturated polyester-resin hybrid composites were studied. The results showed that the hybridization of basalt and glass fiber improved the mechanical properties of hybrid composites.…”

Section: Introductionmentioning

confidence: 99%

Investigation of the effect of steel fiber (200 mesh size) hybridization on properties of steel/glass fiber and steel/basalt fiber reinforced epoxy composite laminates

2022

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Steel fiber is the most common metal fiber used due to its cost-effectiveness, high performance, and availability despite its heavyweight. This study is an attempt to evaluate the mechanical properties of steel/glass fiber and steel/ basalt fiber-reinforced epoxy composites. The symmetric hybrid laminates were produced by replacing the innermost 1, 2, 3, and 4 layers of steel fiber (200 mesh size) with basalt and glass fiber layers. The specimens were subjected to tensile, flexural, and Charpy impact tests in accordance with relevant ASTM standards. Moreover, fracture surfaces were analyzed, and the micrographs were obtained using a scanning electron microscope. The results showed that a high improvement in tensile strength was achieved with BS 1 -E(1 layer steel mesh-8 layers basalt) and GS 1 -E (1 layer steel mesh-8 layers glass) hybrid composites, with an increase of 528% and 233%, respectively, compared to steel fiber reinforced epoxy composites. Similarly, BS 1 -E and GS 1 -E hybrid composites showed the highest flexural strength increase of 82.2% and 66.8%, respectively, compared to steel fiber reinforced epoxy composites. Consequently, the potential to hybridize steel fiber with glass fiber and basalt fiber could create new materials with unique physical structures and synergistic effects on mechanical properties.

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Fatigue Life Prediction of Bio-composites Subjected to Environmental Aging

Cited by 2 publications

References 63 publications

Polymer-Matrix Composites: Characterising the Impact of Environmental Factors on Their Lifetime

Polymer-Matrix Composites: Characterising the Impact of Environmental Factors on Their Lifetime

Investigation of the effect of steel fiber (200 mesh size) hybridization on properties of steel/glass fiber and steel/basalt fiber reinforced epoxy composite laminates

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