A mixed strain rate and energy based fatigue criterion for short fiber reinforced thermoplastics
TypeArticles dans des revues 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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Fatigue damage mechanisms of short fiber reinforced PA66 as observed by in-situ synchrotron X-ray microtomography ROLLAND, Héloise; SAINTIER, Nicolas; RAPHAEL, Ilan; LENOIR, Nicolas; KING, Andrew; ROBERT, Gilles (Elsevier BV, 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 ...
On the role of the spherulitic microstructure in fatigue damage of pure polymer and glass-fiber reinforced semi-crystalline polyamide 6.6 RAPHAEL, 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 ...
Damage mechanisms in short glass fibre reinforced thermoplastic during in situ microtomography tensile tests ROLLAND, Héloise; SAINTIER, Nicolas; ROBERT, Gilles (elsevier, 2016)Micromechanical modelling of short fibre reinforced thermoplastics requires identification of damage mechanisms and their kinetics as a function of their microstructure. A compact tensile machine has been designed to observe ...
In situ X-ray tomography investigation on damage mechanisms in short glass fibre reinforced thermoplastics: Effects of fibre orientation and relative humidity ROLLAND, Héloise; SAINTIER, Nicolas; WILSON, Pablo; MERZEAU, Jonathan; ROBERT, G. (Elsevier BV, 2017)Damage mechanisms of reinforced polyamide 6,6 have been studied in 3D through in situ X-ray tomography tensile tests. 3D pictures of the microstructure have been taken during tensile tests to catch damage evolution in the ...
ARIF, Muhamad Fatikul; SAINTIER, Nicolas; MERAGHNI, Fodil; FITOUSSI, Joseph; CHEMISKY, Yves; ROBERT, Gilles (Elsevier, 2014)This paper aims at studying fatigue damage behavior of injection molded 30 wt% short glass fiber reinforced polyamide-66 composite (PA66/GF30). The evolution of dynamic modulus, hysteresis area, cyclic creep and temperature ...