Effect of aging on the fatigue crack growth properties of carbon-polyamide 6 thermoplastic composites using the multi ΔG-control method

Arhant, Maël; Lolive, Éric; Bonnemains, Thomas; Davies, Peter

doi:10.1016/j.compositesa.2022.107105

Cited by 11 publications

(14 citation statements)

References 39 publications

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“…X c can also be used, although only for sample degraded via pure hydrolysis. The M n correlates with the one found by Arhant et al [49] from the crack propagation rate data.…”

Section: Determination Of Embrittlementsupporting

confidence: 87%

“…This is in correlation with the variations of molecular weight and crystallinity seen in the previous sections. Arhant et al [49] also published in the same year another work regarding the aging of PA6/C in hot deoxygenated water. In here they used a similar methodology, however with a focus on modelling fatigue crack growth behavior at various constant energy, or ∆G as stated in their article.…”

Section: Polyamide 11mentioning

confidence: 99%

“…Hydrolysis fastens the fatigue crack growth rate from 10 −7 for unaged to 10 −6 cm after 90 days at 100 • C and from 10 −7 to 10 −4 cm for aging at 140 • C at a set constant ∆G of 1000 J/m 2 . When plotting their sigmoidal curves following the Hartman-Shijve representation, Arhant et al [49] also fit their experimental data with a model that displayed an average R 2 of 0.9. An Arrhenius plot was constructed based solely on the fatigue crack growth rate and an activation energy of 102 kJ/mol was found.…”

Section: Polyamide 11mentioning

confidence: 99%

“…Arhant et al [48,49] used fracture toughness and crack propagation rate as the tracking mechanical property embrittlement of their PA6/C. This is done by observing the changes in M n against these mechanical parameters.…”

Section: Determination Of Embrittlementmentioning

confidence: 99%

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Pure Hydrolysis of Polyamides: A Comparative Study

Brette,

Holm,

Drozdov

et al. 2023

Preprint

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Nylon, also known as polyamides (PAs), undergoes local environmental degradation, leading to a decline in its mechanical properties over time. The degradation process is strongly influenced by the surrounding environment in which the polymer is utilized. PAs can experience various forms of degradation, such as thermal degradation, oxidation, hydrothermal oxidation, UV oxidation, and hydrolysis. It is crucial to understand each of these degradation mechanisms individually to better comprehend the degradation process of nylon. Although extensive research has been conducted on hydrolysis over the past few decades, there is currently no comprehensive review that consolidates the latest findings. This review analyzes the available characterization data and evaluates the changes in molecular weight, crystallinity, chemical structure, and mechanical properties of PAs that have aged in oxygen-free water at high temperatures. The primary objective is to gain a comprehensive understanding of the aging process of PAs in water without oxygen. Additionally, secondary information is provided, including the influence of fibers and additives in the polymer, hydrolysis susceptibility among PAs with longer aliphatic chains, correlation between different parameters, impact of acids, and important factors for determining the point at which PAs become brittle when subjected solely to hydrolysis.

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“…X c can also be used, although only for sample degraded via pure hydrolysis. The M n correlates with the one found by Arhant et al [49] from the crack propagation rate data.…”

Section: Determination Of Embrittlementsupporting

confidence: 87%

Section: Polyamide 11mentioning

confidence: 99%

Section: Polyamide 11mentioning

confidence: 99%

Section: Determination Of Embrittlementmentioning

confidence: 99%

See 2 more Smart Citations

Pure Hydrolysis of Polyamides: A Comparative Study

Brette,

Holm,

Drozdov

et al. 2023

Preprint

View full text Add to dashboard Cite

show abstract

“…Arhant et al [53] also published, in the same year, another work regarding the aging of PA6/C in hot deoxygenated water. Using a similar methodology, the group focused on modeling fatigue crack growth behavior at various constant energy, or ∆G, as stated in their article.…”

Section: Polyamidementioning

confidence: 98%

Pure Hydrolysis of Polyamides: A Comparative Study

Brette,

Holm,

Drozdov

et al. 2023

Chemistry

View full text Add to dashboard Cite

Polyamides (PAs) undergo local environmental degradation, leading to a decline in their mechanical properties over time. PAs can experience various forms of degradation, such as thermal degradation, oxidation, hydrothermal oxidation, UV oxidation, and hydrolysis. In order to better comprehend the degradation process of PAs, it is crucial to understand each of these degradation mechanisms individually. While this review focuses on hydrolysis, the data from degrading similar PAs under pure thermal oxidation and/or hydrothermal oxidation are also collected to grasp more perspective. This review analyzes the available characterization data and evaluates the changes in molecular weight, crystallinity, chemical structure, and mechanical properties of PAs that have aged in oxygen-free water at high temperatures. The molecular weight and mechanical strength decrease as the crystallinity ratio rises over aging time. This development is occurring at a slower rate than degradation in pure thermal oxidation. By combining the data for the changes in mechanical properties with the ones for molecular weight and crystallinity, the point of embrittlement can be not only predicted, but also modeled. This prediction is also shown to be dependent on the fibers, additives, types of PA, pH, and more.

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