We develop a new block-based elasto-damage model for describing masonry structures. The constitutive elastic and damage behavioural laws used within the proposed approach are inspired from those employed in recent literature granular micromechanics. Adaptations have been made many respects, notably inclusion of impenetrability constraints through energy barriers. analysis carried out this paper...

This study presents a probabilistic, 3-D framework to describe brittle fracture in structural components which incorporates weakest link statistics and a micromechanics model reflecting local damage of material. The Weibull stress (a,) emerges as a fracture parameter to define conditions leading to local material failure. This parameter is correlated with the macroscopic loading and used to des...

It has been contemplated for a long time that dense granular materials flow in stick-slip manner, and large fluctuations the stresses are associated with it. However, particle scale mechanics this type of macroscopic motion not understood so far. We have analyzed evolution contact networks from dynamics simulations found rate change elastic energy packing can distinguish stick regimes slip even...

Nonlinear plastic modes (NPMs) are collective displacements that are indicative of imminent plastic instabilities in elastic solids. In this work we formulate the atomistic theory that describes the reversible evolution of NPMs and their associated stiffnesses under external deformations. The deformation dynamics of NPMs is compared to those of the analogous observables derived from atomistic l...

Fiber fractures in metal-matrix composites often initiate damage zones that grow until the composite fails. To better understand the evolution of such damage from a micromechanics point of view, a model Ti-matrix/SiC-fiber composite was studied for the first time. Using high energy X-rays and a small sampling volume, the damage zone around a broken fiber was investigated. The growth of this zon...