| Titre : | Modeling failure of bitumen films in tension (2013) |
| Auteurs : | O. Portillo, Auteur ; D. Cebon, Auteur |
| Type de document : | Article : texte imprimé |
| Dans : | Journal of engineering mechanics (Vol. 138 N° 11, Novembre 2012) |
| Article en page(s) : | pp.1357–1371. |
| Note générale : | Mécanique appliquée |
| Langues : | Anglais |
| Tags : | 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 |
