Abstract This paper investigates the use of stability factors for estimating ultimate bearing pressures on cylindrical caissons in cohesive-frictional soils. Rigorous upper and lower bound limit analyses with finite elements axisymmetric (AX) condition are used a series numerical studies. The capacity ( N c 0 , q ? ) surface circular footing firstly revisited. is followed by study effect caisso...

Two-dimensional meso-scale finite element models with real aggregates are developed using images obtained by digital image processing to simulate crack propagation processes in concrete under uniaxial compression loading. The model is regarded as a three-phase composite material composed of aggregate, mortar matrix and interface transition zone (ITZ). Cohesive elements traction–separation laws ...

Cohesive elements are commonly used to describe crack propagation in heterogeneous materials with toughening mechanisms. This work aims provide a guideline on how these fracture parameters can be calibrated using notch opening displacements (NODs) measured via digital image correlation and force data from wedge splitting tests (WSTs). Weighted finite element model updating was applied calibrate...

We consider the use of initially rigid cohesive interface models in a two-dimensional dynamic finiteelement solution of a fracture process. Our focus is on convergence of finite-element solutions to a solution of the undiscretized medium as the mesh spacing x (and therefore time-step t) tends to zero. We propose the use of pinwheel meshes, which possess the ‘isoperimetric property’ that for any...

Bottom-up (constrain-surface) Additive Manufacturing (AM) systems have been widely used in industry. Compared to traditional open-surface AM technology, properties like better vertical resolution, higher material filling rate, less production time, and less material waste make bottom-up AM technology a suitable candidate for fabrication of complex three dimensional materials with high accuracy....

Abstract Fibre metal laminates (FML) are layered materials consisting of both and reinforced composite layers. Due to numerous possibilities configuration, constituent materials, etc., designing testing such can be time- cost-consuming. In addition that, some parameters cannot obtained directly from the experiment campaign. These problems often overcome by using numerical simulation. this artic...

using computation software to simulate fracture behaviors of structures can shorten the time to estimate safety of engineering structures and reduce a lot of cost of experiment. However three dimensional numerical simulation for fracture process is a challenging issue, because the convergence and accuracy are not easily obtained and high computational cost is generated. In this paper, three new...