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International Journal for Multiscale Computational Engineering
Factor de Impacto: 1.016 Factor de Impacto de 5 años: 1.194 SJR: 0.452 SNIP: 0.68 CiteScore™: 1.18

ISSN Imprimir: 1543-1649
ISSN En Línea: 1940-4352

International Journal for Multiscale Computational Engineering

DOI: 10.1615/IntJMultCompEng.2015011883
pages 201-217

COMPUTATIONAL MODELING OF DAMAGE BASED ON MICROCRACK KINKING

A. M. Dobrovat
Grenoble-INP/ UJF-Grenoble 1, CNRS UMR 5521, Lab. 3SR, 38041 Grenoble, France
Cristian Dascalu
UPMC Univ. Paris 06, CNRS UMR 7190, Institut Jean-Le-Rond-d'Alembert, 75005 Paris, France; Laboratoire d'Etude des Microstructures et de Mecanique des Materiaux, Universite de Lorraine, CNRS UMR 7239, Ile du Saulcy, F-57045 Metz, France
S. Hall
Division of Solid Mechanics, Lund University, Lund 22100, Sweden and European Spallation Source AB, Lund, Sweden

SINOPSIS

The paper presents numerical results for a two-scale damage model accounting for mixed-mode propagation of microcracks. A time-dependent propagation criterion is assumed for microcrack growth and a kinking direction criterion based on the maximum of the energy-release rate is used. The macroscopic damage evolution laws are obtained by homogenization based on asymptotic developments. A numerical procedure based on finite elements is developed for the two-scale model and simulations illustrating the structural response are presented. A priori microscopic computations increase the efficiency of the computational model at the scale of macroscopic structures. The resulting homogenized behavior involves softening and localization of damage. Direct links between macroscopic damage evolution and microscopic propagation of micro-cracks are established within the two-scale model.


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