Multi-scale modeling of softening materials

Title

Multi-scale modeling of softening materials

 Author

Lloberas Valls, O.
Simone, A.
Sluys, L.J.

Faculty

Civil Engineering and Geosciences

 Department

Structural Engineering

 Date

2008-05-26

 Abstract

This paper presents an assessment of a two-scale framework for the study of softening materials. The procedure is based on a hierarchical Finite Element (FE) scheme in which computations are performed both at macro and mesoscopic scale levels. The methodology is chosen specifically to remain valid when the scales are coupled which is frequently encountered in fracture processes of heterogeneous materials. The effect of the boundary conditions chosen to construct the meso-scale problem is studied in this contribution by comparing multiscale and monoscale analysis of an equivalent problem. It is shown in this study that macroscopic mesh size dependence is encountered when using linear interpolated boundary displacements at the interface between mesospecimens. An improvement to the linear interpolated boundary displacements is presented which proves to be more adequate when strain localisation phenomena is encountered at the interface of the meso-specimens. The specific upscaling procedure for the improved boundary conditions remains an issue of ongoing research.

 To reference this document use:

http://resolver.tudelft.nl/uuid:bbe37fa7-2d38-4aab-8d86-4450a82d7eb0

 Source

CONMOD 2008: International RILEM Symposium on Concrete Modeling, Bagneux, France, 26-28 May 2008

 Part of collection

Institutional Repository

 Document type

conference paper

 Rights

(c) 2008 The Author(s)
Files
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