Multi-scale modeling of softening materials
20317498.pdf (206,0Kb) (Restricted access) Request copy
Què és aquest botó?
Aquest botó permet demanar una còpia d'un document restringit a l'autor. Es mostra quan:
- Disposem del correu electrònic de l'autor
- El document té una mida inferior a 20 Mb
- Es tracta d'un document d'accés restringit per decisió de l'autor o d'un document d'accés restringit per política de l'editorial
Document typeConference report
PublisherInternational Union of Laboratories and Experts in Construction Materials, Systems and Structures (RILEM)
Rights accessRestricted access - publisher's policy
This paper presents an assessment of a two-scale framework for the study of softening materials such as concrete. The procedure is based on a hierarchical Finite Element (FE) scheme in which computations are performed both at macroscopic and mesoscopic scale levels. The methodology is chosen specifically to remain valid when the scales are coupled. This situation is encountered in fracture processes of heterogeneous materials. The effect of the boundary conditions chosen to construct the meso-scale problem is studied by comparing multi-scale and mono-scale analyses. It is shown that macroscopic mesh size dependence is encountered when using linear interpolated boundary displacements at the interface between meso-specimens. An improvement to the linear interpolated boundary displacements is presented which proves to be more adequate when strain localisation phenomena are encountered at the interface of the meso-specimens. The specific upscaling procedure for the improved boundary conditions remains an issue of ongoing research.
CitationLloberas-Valls, O., Simone, A., Sluys, L. Multi-scale modeling of softening materials. A: International RILEM Symposium on Concrete Modelling. "International RILEM Symposium on Concrete Modelling: ConMod '08". Bagneux: International Union of Laboratories and Experts in Construction Materials, Systems and Structures (RILEM), 2008, p. 345-352.
All rights reserved. This work is protected by the corresponding intellectual and industrial property rights. Without prejudice to any existing legal exemptions, reproduction, distribution, public communication or transformation of this work are prohibited without permission of the copyright holder