A bonded-particle model for rock

TL;DR: In this article , the mesoscopic fracture characteristic of cemented rockfill was investigated and the effects of aggregate strength and mass fraction on strength, deformation, energy, and cracking of rockfill were investigated.

TL;DR: Liu et al. as mentioned in this paper developed a flexible straw model based on the Hertz-Mindlin with bonding model using discrete element method, which was constructed by bonding straw units (filled by multi-spherical method) through parallel bonding keys.

TL;DR: In this paper, the authors present a numerical study of spatio-temporal damage evolution and fracture displacements around underground excavation in fractured rock masses, and conduct a comparative analysis of this problem based on a mechanical model by assuming an invariant pore pressure and a hydro-mechanical model by solving the coupling between the fluid and solid fields.

TL;DR: In this paper, the authors proposed that the discrete element method (DEM) is a more appropriate tool to investigate the shallow penetration of torpedo anchors in sands, where the effects of anchor mass, impact velocity, and soil interparticle friction are considered in the DEM simulations.

TL;DR: The distinct element method as mentioned in this paper is a numerical model capable of describing the mechanical behavior of assemblies of discs and spheres and is based on the use of an explicit numerical scheme in which the interaction of the particles is monitored contact by contact and the motion of the objects modelled particle by particle.

TL;DR: In this article, the authors investigated the effect of surface scratches on the mechanical strength of solids, and some general conclusions were reached which appear to have a direct bearing on the problem of rupture, from an engineering standpoint, and also on the larger question of the nature of intermolecular cohesion.

TL;DR: Verification and validation of numerical models of natural systems is impossible because natural systems are never closed and because model results are always nonunique.

TL;DR: In this paper, the authors used the Weibull-type approach to measure the effect of size effect on structural strength of a crack and its size effect in terms of the number of cracks and the size of the cracks.