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Mesoscale analysis of failure in quasi‐brittle materials: comparison between lattice model and acoustic emission data |
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| Authors: | David Grégoire Laura Verdon Vincent Lefort Peter Grassl Jacqueline Saliba Jean‐Pierre Regoin Ahmed Loukili Gilles Pijaudier‐Cabot |
| Affiliation: | 1. Laboratoire des Fluides Complexes et leurs Réservoirs, LFC‐R UMR5150, Université de Pau et des Pays de l'Adour, Anglet, France;2. University of Glasgow, Glasgow, U.K.;3. GeM – Institut de Recherche en génie civil et mécanique, Ecole Centrale de Nantes, Nantes, France |
| Abstract: | The purpose of this paper is to analyse the development and the evolution of the fracture process zone during fracture and damage in quasi‐brittle materials. A model taking into account the material details at the mesoscale is used to describe the failure process at the scale of the heterogeneities. This model is used to compute histograms of the relative distances between damaged points. These numerical results are compared with experimental data, where the damage evolution is monitored using acoustic emissions. Histograms of the relative distances between damage events in the numerical calculations and acoustic events in the experiments exhibit good agreement. It is shown that the mesoscale model provides relevant information from the point of view of both global responses and the local failure process. © 2015 The Authors. International Journal for Numerical and Analytical Methods in Geomechanics published by John Wiley & Sons Ltd. |
| Keywords: | mesoscopic model fracture process zone damage quasi‐brittle materials experimental acoustic emission |