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Mesh dependence and nonlocal regularization of one-dimensional strain softening plasticity / S. Wu in Journal of engineering mechanics, Vol. 136 N° 11 (Novembre 2010) 

Public ISBD [article]  in Journal of engineering mechanics > Vol. 136 N° 11 (Novembre 2010) . - pp.1354-1365 Titre : Mesh dependence and nonlocal regularization of one-dimensional strain softening plasticity Type de document : texte imprimé Auteurs : S. Wu, Auteur ; X. Wang, Auteur Année de publication : 2011 Article en page(s) : pp.1354-1365 Note générale : Mécanique appliquée Langues : Anglais (eng) Mots-clés : Strain  softening  Localization  Plasticity  Finite  element  method. Résumé : Finite-element analysis of strain localization based on classical theory of continuum mechanics suffers from pathological mesh dependence when strain softening models are used. For quasistatic problems, the mesh dependence is demonstrated through an analysis of the tangent stiffness matrix of a one-dimensional problem. To regularize the mesh dependence, a nonlocal strain softening model is proposed, which is based on the nonlocal plasticity theory and the representative line element. Both analytical and numerical solutions of strain localization with the proposed model are developed and compared with each other. The model is also applied in the numerical simulation of a direct tensile test of a concrete specimen in the existing literature, and reasonable agreement is achieved between numerical solutions and the experimental response. DEWEY : 620.1 ISSN : 0733-9399 En ligne : http://ascelibrary.org/emo/resource/1/jenmdt/v136/i11/p1354_s1?isAuthorized=no [article] Mesh dependence and nonlocal regularization of one-dimensional strain softening plasticity [texte imprimé] / S. Wu, Auteur ; X. Wang, Auteur . - 2011 . - pp.1354-1365. Mécanique appliquée Langues : Anglais (eng) in Journal of engineering mechanics > Vol. 136 N° 11 (Novembre 2010) . - pp.1354-1365 Mots-clés : Strain  softening  Localization  Plasticity  Finite  element  method. Résumé : Finite-element analysis of strain localization based on classical theory of continuum mechanics suffers from pathological mesh dependence when strain softening models are used. For quasistatic problems, the mesh dependence is demonstrated through an analysis of the tangent stiffness matrix of a one-dimensional problem. To regularize the mesh dependence, a nonlocal strain softening model is proposed, which is based on the nonlocal plasticity theory and the representative line element. Both analytical and numerical solutions of strain localization with the proposed model are developed and compared with each other. The model is also applied in the numerical simulation of a direct tensile test of a concrete specimen in the existing literature, and reasonable agreement is achieved between numerical solutions and the experimental response. DEWEY : 620.1 ISSN : 0733-9399 En ligne : http://ascelibrary.org/emo/resource/1/jenmdt/v136/i11/p1354_s1?isAuthorized=no