The theoretical shear strength of fcc crystals under superimposed triaxial stress / M. Černý in Acta materialia, Vol. 58 N° 8 (Mai 2010)  

Public ISBD [article]  inActa materialia > Vol. 58 N° 8 (Mai 2010) . - pp. 3117–3123 Titre : The theoretical shear strength of fcc crystals under superimposed triaxial stress Type de document : texte imprimé Auteurs : M. Černý, Auteur ; J. Pokluda, Auteur Année de publication : 2011 Article en page(s) : pp. 3117–3123 Note générale : Métallurgie Langues : Anglais (eng) Mots-clés : Ideal shear strength Homogeneous deformation Ab initio calculations fcc metals Résumé : The influence of a triaxial stress applied normally to shear planes and shear direction during affine shear deformation of face-centered cubic crystals on the theoretical shear strength is studied for the View the MathML source shear system using first-principles methods. The applied relaxation procedure guarantees that the modeled system is subjected to a superposition of shear, normal and in-plane stresses with individually adjustable in-plane and normal stress values. The theoretical shear strengths of individual elements prove to be qualitatively different functions of the superimposed stresses. In the special case of hydrostatic loading, however, these functions are qualitatively uniform. This behavior is discussed in terms of the electronic structure. DEWEY : 669 ISSN : 1359-6454 En ligne : http://www.sciencedirect.com/science/article/pii/S1359645410000807 [article] The theoretical shear strength of fcc crystals under superimposed triaxial stress [texte imprimé] / M. Černý, Auteur ; J. Pokluda, Auteur . - 2011 . - pp. 3117–3123. Métallurgie Langues : Anglais (eng) in Acta materialia > Vol. 58 N° 8 (Mai 2010) . - pp. 3117–3123 Mots-clés : Ideal shear strength Homogeneous deformation Ab initio calculations fcc metals Résumé : The influence of a triaxial stress applied normally to shear planes and shear direction during affine shear deformation of face-centered cubic crystals on the theoretical shear strength is studied for the View the MathML source shear system using first-principles methods. The applied relaxation procedure guarantees that the modeled system is subjected to a superposition of shear, normal and in-plane stresses with individually adjustable in-plane and normal stress values. The theoretical shear strengths of individual elements prove to be qualitatively different functions of the superimposed stresses. In the special case of hydrostatic loading, however, these functions are qualitatively uniform. This behavior is discussed in terms of the electronic structure. DEWEY : 669 ISSN : 1359-6454 En ligne : http://www.sciencedirect.com/science/article/pii/S1359645410000807

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