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Détail de l'auteur
Auteur F.X. Li
Documents disponibles écrits par cet auteur
Affiner la rechercheAn optimization-based computational model for domain evolution in polycrystalline ferroelastics / F.X. Li in Acta materialia, Vol. 58 N° 6 (Avril 2010)
[article]
in Acta materialia > Vol. 58 N° 6 (Avril 2010) . - pp. 2207–2215
Titre : An optimization-based computational model for domain evolution in polycrystalline ferroelastics Type de document : texte imprimé Auteurs : F.X. Li, Auteur ; A.K. Soh, Auteur Année de publication : 2011 Article en page(s) : pp. 2207–2215 Note générale : Métallurgie Langues : Anglais (eng) Mots-clés : Ferroelastics Polycrystalline Domain switching Optimization Plasticity Résumé : An optimization-based computational model is proposed to study domain evolution in polycrystalline ferroelastics composed of numerous randomly oriented grains, each of which consists of multiple types of domains. Under any prescribed loading, the volume fraction of each domain in a grain is obtained by minimizing the free energy of the said grain using an optimization method. The mechanical constraint from the neighboring grains is considered using Eshelby inclusion approach. This model has the similar superiority as the phase field model, which does not require imposition of any priori domain-switching criterion. The computational efficiency of this model is fairly high and it is feasible to study three-dimensional cases using numerous grains. Furthermore, this model can reproduce Taylor’s rule of plasticity very well. Simulation results for tetragonal, rhombohedral and morphotropic PZT ceramics are employed to validate the superiority and efficiency of this model. The domain texture evolution process can also be calculated. DEWEY : 669 ISSN : 1359-6454 En ligne : http://www.sciencedirect.com/science/article/pii/S1359645409008404 [article] An optimization-based computational model for domain evolution in polycrystalline ferroelastics [texte imprimé] / F.X. Li, Auteur ; A.K. Soh, Auteur . - 2011 . - pp. 2207–2215.
Métallurgie
Langues : Anglais (eng)
in Acta materialia > Vol. 58 N° 6 (Avril 2010) . - pp. 2207–2215
Mots-clés : Ferroelastics Polycrystalline Domain switching Optimization Plasticity Résumé : An optimization-based computational model is proposed to study domain evolution in polycrystalline ferroelastics composed of numerous randomly oriented grains, each of which consists of multiple types of domains. Under any prescribed loading, the volume fraction of each domain in a grain is obtained by minimizing the free energy of the said grain using an optimization method. The mechanical constraint from the neighboring grains is considered using Eshelby inclusion approach. This model has the similar superiority as the phase field model, which does not require imposition of any priori domain-switching criterion. The computational efficiency of this model is fairly high and it is feasible to study three-dimensional cases using numerous grains. Furthermore, this model can reproduce Taylor’s rule of plasticity very well. Simulation results for tetragonal, rhombohedral and morphotropic PZT ceramics are employed to validate the superiority and efficiency of this model. The domain texture evolution process can also be calculated. DEWEY : 669 ISSN : 1359-6454 En ligne : http://www.sciencedirect.com/science/article/pii/S1359645409008404 Influences of cube texture on etched foil capacitance / F. Kuang in Materials and corrosion, Vol. 63 N° 8 (Août 2012)
[article]
in Materials and corrosion > Vol. 63 N° 8 (Août 2012) . - pp. 739–743
Titre : Influences of cube texture on etched foil capacitance Type de document : texte imprimé Auteurs : F. Kuang, Auteur ; F.X. Li, Auteur ; Hong, T., Auteur Année de publication : 2013 Article en page(s) : pp. 739–743 Note générale : Génie mécanique Langues : Anglais (eng) Mots-clés : Cube texture; current efficiency; etched foil; weight loss Résumé : The influences of aluminum cube texture on etched foil qualities and current efficiency were studied in this paper. The present results indicated that the decrease of cube texture (volume fraction) would lead to the decrease of tunnel densities on etched foils. Current efficiency changed little with cube texture and could reach up to 98%. The same current efficiency led to the same electrochemical corrosion weight loss, which caused the etched foils with a smaller tunnel density had a larger tunnel size. The same electrochemical corrosion weight loss would also lead to the etched foils produced by different cube texture foil have the same folding endurance. The etched foil produced by the foil with a better cube texture would have a larger tunnel density, which caused the capacitance of it was larger. En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.201106110/abstract [article] Influences of cube texture on etched foil capacitance [texte imprimé] / F. Kuang, Auteur ; F.X. Li, Auteur ; Hong, T., Auteur . - 2013 . - pp. 739–743.
Génie mécanique
Langues : Anglais (eng)
in Materials and corrosion > Vol. 63 N° 8 (Août 2012) . - pp. 739–743
Mots-clés : Cube texture; current efficiency; etched foil; weight loss Résumé : The influences of aluminum cube texture on etched foil qualities and current efficiency were studied in this paper. The present results indicated that the decrease of cube texture (volume fraction) would lead to the decrease of tunnel densities on etched foils. Current efficiency changed little with cube texture and could reach up to 98%. The same current efficiency led to the same electrochemical corrosion weight loss, which caused the etched foils with a smaller tunnel density had a larger tunnel size. The same electrochemical corrosion weight loss would also lead to the etched foils produced by different cube texture foil have the same folding endurance. The etched foil produced by the foil with a better cube texture would have a larger tunnel density, which caused the capacitance of it was larger. En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.201106110/abstract