Thermo-mechanical fatigue of centrally notched and unnotched AS-4/PEEK APC-2 composite laminates

Jen, Ming-Hwa R.; Tseng, Yu-Chung; Lin, Wei-Hwang

doi:10.1016/j.ijfatigue.2005.10.003

Cited by 22 publications

(12 citation statements)

References 23 publications

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“…induce a local relaxation of stresses [16][17][18][19]. Damage onset and growth near the hole are different in PEEK-based and Epoxy-based laminates [20][21][22][23][24][25][26][27][28]. Damage is widespread around the hole in TS-based composites, whereas it is localized in TP-based composites [4,5].…”

Section: Introductionmentioning

confidence: 99%

Fatigue damage accumulation in notched woven-ply thermoplastic and thermoset laminates at high-temperature: Influence of matrix ductility and fatigue life prediction

Vieille

Albouy

2015

International Journal of Fatigue

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Section: Introductionmentioning

confidence: 99%

Fatigue damage accumulation in notched woven-ply thermoplastic and thermoset laminates at high-temperature: Influence of matrix ductility and fatigue life prediction

Vieille

Albouy

2015

International Journal of Fatigue

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“…Similar explanations refer to the turning points, F′ and M′, as shown in Figure 4b, which can be used when the ambient temperature increases to 100 °C. For a comparison, experimental data of the failure strength at 100 °C acquired by Jen et al [45] are also indicated. It can be easily found that the theoretical predictions tend to overestimate and underestimate their final failure strengths of false[0/90false]4s and false[0/45/90/−45false]4s composite laminates to some extent, respectively.…”

Section: Materials and Work Methodsmentioning

confidence: 99%

Evaluate the Fatigue Life of CFRC Subjected to Coupled Thermo–Mechanical Loading

Shi

et al. 2019

Materials

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Mechanical properties of composites manufactured by high-temperature polymer polyether ether ketone (PEEK) with continuous reinforced fibers are closely dependent on ambient temperature variations. In order to effectively study fatigue failure behaviors of composites under the coupled thermo–mechanical loading, a well-established microscopic model based on a representative volume element (RVE) is proposed in this paper. Stiffness degradation behaviors of the composite laminates at room and elevated temperatures are firstly investigated, and their failure strengths are compared with experimental data. To describe the fatigue behaviors of composites with respect to complex external loading and ambient temperature variations, a new fatigue equation is proposed. A good consistency between theoretical results and experimental data was found in the cases. On this basis, the temperature cycling effects on the service life of composites are also discussed. Microscopic stress distributions of the RVE are also discussed to reveal their fatigue failure mechanisms.

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“…From the studies available in the literature, the hole sensitivity representing the loss of the material's strength due to the presence of a hole is usually higher in TP-based composites, [26][27][28][29][30][31][32][33][34] although most of the references examine unidirectional (UD) composites. In UD composites or laminates pressed from pre-impregnated sheets of continuous and non-woven fibres, stress-concentrating effects of notches and holes may be virtually completely eliminated by large-scale splitting in the 0 and 45 plies and by delamination between the plies, the net result often being disintegration of the composite.…”

Section: Introduction Backgroundmentioning

confidence: 99%

Fatigue accumulated damage in notched quasi-isotropic composites under high-temperature conditions: A discussion on the influence of matrix nature on the stress energy release rate

Vieille

2017

Journal of Composite Materials

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In order to investigate the contribution of matrix nature to the fatigue behaviour, the purpose of the present work is to establish the correlation between material toughness and macroscopic damage accumulation during tensile cyclic loading in the brittle (C/epoxy) and ductile (C/Polyphenylene sulfide) matrix systems. More specifically, this article presents a fracture mechanics-based approach to compute the strain energy release rate during fracture along with the macroscopic transverse crack growth in fatigue. The knowledge of energy-absorbing processes is important as they are responsible for the toughness of the composite. Woven-ply laminates are characterised by matrix-rich regions which may stop or slow down the growth of fatigue cracks by absorbing the mechanical energy through local plastic deformations at the cracks tip depending on matrix nature. With respect to C/epoxy laminates, the local plastic deformations at the cracks tip are prominent in highly ductile composite systems (e.g. C/Polyphenylene sulfide), and ultimately results in fatigue behaviour virtually independent of the applied stress level under high temperatures T > Tg. To evaluate the influence of matrix ductility and toughness on fatigue damage, a damage variable d based on the measurement of longitudinal stiffness at each cycle was used. A model derived from a Paris law and a fracture mechanics criterion were combined to: (i) evaluate the fatigue crack growth – (ii) compare the changes in the strain energy release rate G and the macroscopic damage d during cyclic loading. Macroscopic damage appears to be well correlated with the strain energy released during fracture.

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Thermo-mechanical fatigue of centrally notched and unnotched AS-4/PEEK APC-2 composite laminates

Cited by 22 publications

References 23 publications

Fatigue damage accumulation in notched woven-ply thermoplastic and thermoset laminates at high-temperature: Influence of matrix ductility and fatigue life prediction

Fatigue damage accumulation in notched woven-ply thermoplastic and thermoset laminates at high-temperature: Influence of matrix ductility and fatigue life prediction

Evaluate the Fatigue Life of CFRC Subjected to Coupled Thermo–Mechanical Loading

Fatigue accumulated damage in notched quasi-isotropic composites under high-temperature conditions: A discussion on the influence of matrix nature on the stress energy release rate

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