Abstract
In this study, we rely on a ’bond-based’ peridynamic approach to investigate the strength and failure of 2D particles containing a collection of 1D microcracks. The mechanical tests were performed on disks under diametral compression. In an extensive parametric study, the distribution of microcracks was varied for different particle sizes. The evolution of yield stress with diameter and the probability of failure in terms of Weibull distributions are investigated in detail. Finally, by means of a floodfill algorithm, we analyze the variation of the mean fragment size as a function of the density of defects.
Highlights
Comminution consists in reducing the average size of particles by different processes such as crushing, grinding or cutting
Numerical simulations based on the Discrete Element Method (DEM) have been used for the investigation of particle crushing by modeling each grain as a cohesive agglomerate of smaller particles [9,10,11,12]
We developed a methodology to investigate the fracture of 2D particles containing defects
Summary
Comminution consists in reducing the average size of particles by different processes such as crushing, grinding or cutting. Numerical simulations based on the Discrete Element Method (DEM) have been used for the investigation of particle crushing by modeling each grain as a cohesive agglomerate of smaller (primary) particles [9,10,11,12]. Such simulations can reproduce the evolution of cracks and complex geometries of fragments in 2D [13, 14] and 3D [15,16,17]. We are interested in their yield stress and distribution of fragments as a function of the density of defects for a range of particle sizes
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