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International Journal for Multiscale Computational Engineering

Publicou 6 edições por ano

ISSN Imprimir: 1543-1649

ISSN On-line: 1940-4352

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CONTINUUM TO DISCONTINUUM TRANSITION DURING FAILURE IN NONLOCAL DAMAGE MODELS

Volume 10, Edição 6, 2012, pp. 567-580
DOI: 10.1615/IntJMultCompEng.2012003061
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RESUMO

The purpose of this paper is to discuss how boundary and emerging boundary effects can be folded into a new nonlocal damage formulation based on integral models that provides a consistent transition toward discrete cracking. Several enhancements of the original nonlocal damage model inspired from micromechanics of interacting defects are considered. The goals of the modified nonlocal formulation are threefold: (i) the distribution of damage at failure should be mesh independent; (ii) the model should be able to capture the continuous-discontinuous transition involved in the process of failure due to increasing stresses; (iii) the discontinuous displacements fields resulting from complete failure should be approached as closely as possible. A 1D example illustrates the capabilities of the original and enhanced models. It is found that a combination of increasing/decreasing interactions and nonlocal effects during failure provides the most suitable results.

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CITADO POR
  1. Grégoire D.,  Rojas-Solano L.B., Pijaudier-Cabot G., Failure and size effect for notched and unnotched concrete beams, International Journal for Numerical and Analytical Methods in Geomechanics, 37, 10, 2013. Crossref

  2. Grégoire David, Rojas-Solano Laura, Lefort Vincent, Grassl Peter, Pijaudier-Cabot Gilles, Size and Boundary Effects During Failure in Quasi-brittle Materials: Experimental and Numerical Investigations, Procedia Materials Science, 3, 2014. Crossref

  3. Pijaudier-Cabot Gilles, Grégoire David, A review of non local continuum damage: Modelling of failure?, Networks & Heterogeneous Media, 9, 4, 2014. Crossref

  4. Grégoire David, Verdon Laura, Lefort Vincent, Grassl Peter, Saliba Jacqueline, Regoin Jean-Pierre, Loukili Ahmed, Pijaudier-Cabot Gilles, Mesoscale analysis of failure in quasi-brittle materials: comparison between lattice model and acoustic emission data, International Journal for Numerical and Analytical Methods in Geomechanics, 39, 15, 2015. Crossref

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