A mixed strain rate and energy based fatigue criterion for short fiber reinforced thermoplastics
Article dans une revue avec comité de lecture
Multiple parameters influence the durability of reinforced thermoplastics under fatigue loading. Having models unifying as many of these parameters, while providing an accurate estimation of the fatigue lifetime, is thus key. This investigation on the evolution of multiple mechanical parameters under cyclic loading, and based on a large experimental database (more than 200 uniaxial fatigue tests over a wide range of load ratios), two cyclic strainrate based criteria are proposed. The second is more elaborated, introducing anelastic energy, to better account for mean stress effect and unify fatigue life predictions within scatter bands of factor two.
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On the role of the spherulitic microstructure in fatigue damage of pure polymer and glass-fiber reinforced semi-crystalline polyamide 6.6 Article dans une revue avec comité de lectureRAPHAEL, Ilan; SAINTIER, Nicolas; ROBERT, Gilles; BEGA, Jéremy; LAIARINANDRASANA, Lucien (ELSEVIER, 2019)Understanding fatigue damage mechanisms in short fiber reinforced thermoplastics is a key issue in order to optimize material processing and propose physically based multiscale fatigue damage models. The present work aims ...
Fatigue damage mechanisms of short fiber reinforced PA66 as observed by in-situ synchrotron X-ray microtomography Article dans une revue avec comité de lectureROLLAND, Héloise; SAINTIER, Nicolas; RAPHAEL, Ilan; LENOIR, Nicolas; KING, Andrew; ROBERT, Gilles (Elsevier, 2018)The understanding of fatigue damage mechanisms of short fiber reinforced thermoplastics are a key issue in order to optimize material processing and propose physically based multiscale fatigue damage models. The presented ...
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