High-temperature fatigue behavior of woven-ply thermoplastic composites

Vieille, B.; Taleb, Lakhdar

doi:10.1016/b978-0-08-102575-8.00006-1

Cited by 2 publications

(4 citation statements)

References 93 publications

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“…Hence, considering how temperature affects the latter, it comes as no surprise that an increase in temperature also worsens fatigue performance. Additionally, due to the viscoelastic, i.e., time-dependent, properties of polymer-matrix composites, creep and creep-fatigue interactions are important factors that need to be accounted for whenever cyclic stresses under different temperatures are likely to occur [35,36].…”

Section: Temperaturementioning

confidence: 99%

“…Relating to high-cycle fatigue, there is an essential factor to take into consideration, namely autogenous heating, which is prone to occur in polymers with higher non-linear behaviour and damping capacity, such as thermoplastics [42]. Their low-temperature conductivity [35,42] leads to a temperature increase, in turn, reducing the fatigue life (Figure 12). Despite the fact that fatigue life is generally better with lower temperatures (mainly due to higher stiffness), when extreme levels are considered, some aspects need to be considered [43].…”

Section: Temperaturementioning

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: Temperaturementioning

confidence: 99%

Section: Temperaturementioning

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

“…Thus, in laminated composites consisting of a thermoplastic (TP) matrix, the ductility and toughness of the TP matrix play a significant role in the fatigue performance of woven-ply laminates by modifying the damage mechanisms and their chronology. [14][15][16][17][18][19][20][21][22][23][24][25][26][27][28] Vieille et al have proposed a detailed literature review on the fatigue behaviour of thermoplasticbased laminated composites, more specifically under high temperature conditions. 14 New materials often lack the necessary database for a fast application in cyclic loaded PMCs parts due to time-consuming testing series.…”

Section: Influence Of Matrix Nature On the Fatigue Performance Of Ud ...mentioning

confidence: 99%

“…[14][15][16][17][18][19][20][21][22][23][24][25][26][27][28] Vieille et al have proposed a detailed literature review on the fatigue behaviour of thermoplasticbased laminated composites, more specifically under high temperature conditions. 14 New materials often lack the necessary database for a fast application in cyclic loaded PMCs parts due to time-consuming testing series. Under the working hypothesis that cracks are the main contributors for heat emission, TP-based composites are characterized by a different behavior in comparison to thermosets under fatigue loading.…”

Section: Influence Of Matrix Nature On the Fatigue Performance Of Ud ...mentioning

confidence: 99%

About the high temperature fatigue performance of thermoplastic-based composite laminates for aeronautical applications

Vieille,

Bouscarrat,

Patel

et al. 2023

Journal of Composite Materials

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The use of thermoplastic-based composites for applications in high temperature aeronautical parts is often considered contradictory with respect to the softening of the matrix and the subsequent degradation of their mechanical properties, especially when service temperature T exceeds glass transition temperature. This paper examines the fatigue performance of unidirectional (UD) carbon fibers reinforced PolyArylEtherKetone (PAEK) laminates subjected to tension-tension fatigue at different testing temperatures (Room Temperature, 120°C and 170°C). Laminates consisting of different portions of plies in 0°/+45°/−45°/90° orientations have been investigated to evaluate the contribution of each ply orientation to the fatigue performance in terms of S-N diagrams. From the evolution of life span as a function of applied stress, it appears that the influence of temperature on fatigue behaviour of C/PAEK composites depends on the temperature conditions. 0° plies behaviour is known to be temperature-independent as is dominated by the mechanical behaviour of UD carbon fibers. It is expected to reflect on the fatigue behaviour at high temperature. From the obtained results, one may conclude that the 0° plies primarily bear the tensile load in fatigue (47-67-91% in SOFT, QI and HARD laminates, respectively) and therefore dominate the fatigue behaviour. The deformation mechanisms in +/−45° plies (localized plastic-viscoplastic dissipative behaviors) favoured at temperatures higher than Tg (e.g. 143°C) are limited by the low deformation of 0° plies. SOFT (12% of 0° plies) and QI (25% of 0° plies) laminates have similar relative fatigue performance. Unexpectedly, the fatigue performance of HARD laminates (about 62% of 0° plies) is improved at T>Tg at high stress levels. A simple temperature-dependent analytical model was used to successfully predict the fatigue life of C/PAEK laminates with different stacking sequences.

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High-temperature fatigue behavior of woven-ply thermoplastic composites

Cited by 2 publications

References 93 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

About the high temperature fatigue performance of thermoplastic-based composite laminates for aeronautical applications

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