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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Donzella, Giorgio
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (11/11 displayed)
- 2022Anisotropic Behaviour of Extruded Short Carbon Fibre Reinforced PEEK Under Static and Fatigue Loadingcitations
- 2021Application of the Failure Assessment Diagram approach for contact fatigue damage evaluation in railway wheel steelscitations
- 2018Influence of micro-notches on the fatigue strength and crack propagation of unfilled and short carbon fiber reinforced PEEKcitations
- 2016Design and realization a skiff racing boat hull made of natural fibers reinforced compositecitations
- 2015Experimental and Numerical Investigation on Shear Propagation of Subsurface Cracks under Rolling Contact Fatiguecitations
- 2013Fatigue behavior and cyclic damage of peek short fiber reinforced compositescitations
- 2012Extension to finite life of a failure assessment diagram for contact fatigue loadingcitations
- 2011Application of a failure assessment diagram under rolling contact to components with hardness variable along the depthcitations
- 2010A failure assessment diagram for components subjected to rolling contact loadingcitations
- 2010Failure analysis and life prediction of polymeric rollers for industrial applicationscitations
- 2009Competition between wear and rolling contact fatigue at the wheel-rail interface: some experimental evidence on rail steelcitations
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article
Influence of micro-notches on the fatigue strength and crack propagation of unfilled and short carbon fiber reinforced PEEK
Abstract
hort carbon fiber reinforced (SCFR) PEEK is a highly attractive material for lightweight structures; improving knowledge about the influence of local imperfections on its fatigue behavior is essential for the design of real components. To this aim, fatigue strength and crack propagation of two grades of SCFR PEEK and neat matrix were investigated by testing at different stress levels specimens with a micro-notch consisting of a small blind hole (range diameter 0.1–1 mm). Overall, the presence of a micro-notch resulted in a decrease of fatigue strength compared to un-notched condition, but with different sensitivity and crack propagation patterns; while a higher fiber volume fraction enhanced fatigue strength and resistance to crack propagation, the combination of a lower fiber content and inclusion of additive particles had a negative effect. Crack propagation in the notched region was also evaluated. The average values of Paris' law exponential coefficients were similar and within the range of literature values, without apparent correlation with reinforcement type. Preliminary investigations in the presence of the smallest micro-notches seem to indicate the presence of a threshold size below which the influence of a small notch is comparable with that of material inherent defects, but further testing is necessary.