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Modeling failure of bitumen films in tension / O. Portillo in Journal of engineering mechanics, Vol. 138 N° 11 (Novembre 2012) 

Public ISBD [article]  in Journal of engineering mechanics > Vol. 138 N° 11 (Novembre 2012) . - pp.1357–1371. Titre : Modeling failure of bitumen films in tension Type de document : texte imprimé Auteurs : O. Portillo, Auteur ; D. Cebon, Auteur Année de publication : 2013 Article en page(s) : pp.1357–1371. Note générale : Mécanique appliquée Langues : Anglais (eng) Mots-clés : Bitumen  films  Cohesive  modeling  Fracture  energy  Finite-element  method  Viscous  materials Résumé : Finite-element analysis is used to model the failure of thin-film butt-joint specimens of pure bitumen in tension for a wide range of test conditions (temperature and strain rate). The approach uses a powerful numerical scheme based on two components: a nonlinear viscous, temperature- and rate-dependent constitutive material model that describes the mechanical deformation behavior of bitumen, implemented into a special-purpose finite-element user material subroutine, and a cohesive zone model for simulating the fracture process. The finite-element model is validated by comparing computed fracture characterization parameters with experimental results. The predicted force versus displacement characteristics and the normalized toughness, G/2h, are found to compare favorably with experimental results in the ductile and brittle regimes, with the failure mode being accurately simulated. ISSN : 0733-9399 En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%29EM.1943-7889.0000417 [article] Modeling failure of bitumen films in tension [texte imprimé] / O. Portillo, Auteur ; D. Cebon, Auteur . - 2013 . - pp.1357–1371. Mécanique appliquée Langues : Anglais (eng) in Journal of engineering mechanics > Vol. 138 N° 11 (Novembre 2012) . - pp.1357–1371. Mots-clés : Bitumen  films  Cohesive  modeling  Fracture  energy  Finite-element  method  Viscous  materials Résumé : Finite-element analysis is used to model the failure of thin-film butt-joint specimens of pure bitumen in tension for a wide range of test conditions (temperature and strain rate). The approach uses a powerful numerical scheme based on two components: a nonlinear viscous, temperature- and rate-dependent constitutive material model that describes the mechanical deformation behavior of bitumen, implemented into a special-purpose finite-element user material subroutine, and a cohesive zone model for simulating the fracture process. The finite-element model is validated by comparing computed fracture characterization parameters with experimental results. The predicted force versus displacement characteristics and the normalized toughness, G/2h, are found to compare favorably with experimental results in the ductile and brittle regimes, with the failure mode being accurately simulated. ISSN : 0733-9399 En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%29EM.1943-7889.0000417