Razafindrazaka M. author Tanguy D. author Delafosse D. author 2009 Two-dimensional discrete dislocation dynamics simulations are used to model the plastic deformation of an fcc metallic material containing large densities of defects. An obstacle model is proposed, based on the line tension concept. Increasing yield strength and hardening are obtained when the obstacle density is increased and destroyable junctions are included. A high dislocation source density is used to obtain a good dissemination of dislocations. Over 30% of the total density is stored as junctions. Slip is shown to be localized within a few intense slip bands, whatever the obstacle density. This localization is quantified as a function of the density of obstacles. Dislocation theory Hardening exported from refbase (http://arc.nucapt.northwestern.edu/refbase/show.php?record=10699), last updated on Mon, 26 Oct 2009 16:51:53 -0500 text http://www.sciencedirect.com/science/article/B6TXD-4WWG35R-6/2/5b46c260f57a11d6beb86568bb4d7751 http://www.sciencedirect.com/science/article/B6TXD-4WWG35R-6/2/5b46c260f57a11d6beb86568bb4d7751 10.1016/j.msea.2009.07.045 Razafindrazaka-2009 NU @ m-krug @ razafindrazaka_defect_2009 2009 continuing periodical academic journal 527 1-2 150 156 0921-5093