Numerical and analytical effective elastic properties of degraded cement pastes

Bary, Benoı̂t; Haha, Mohsen Ben; Adam, Erwan; Montarnal, Philippe

doi:10.1016/j.cemconres.2009.06.012

Cited by 33 publications

(18 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This is believed to be important in particular for estimating the initiation and propagation paths of the cracks, as the behavior of both mortar matrix and aggregates are dissimilar. The geometry and mesh of the mesostructure are generated via a script developed in python language, which makes use of the geometry module and meshing softwares plugged to the integration platform for numerical simulations Salome (www.salome-platform.org) [26,45,46]. Aggregates are modeled by Voronoi particles, whose shape is believed to be more realistic than simpler ones like spheres (see also e.g.…”

Section: Generation Of the 3d Mesostructurementioning

confidence: 99%

Coupled carbonation-rust formation-damage modeling and simulation of steel corrosion in 3D mesoscale reinforced concrete

Nguyen

Bary

Larrard

2015

Cement and Concrete Research

Self Cite

View full text Add to dashboard Cite

Section: Generation Of the 3d Mesostructurementioning

confidence: 99%

Coupled carbonation-rust formation-damage modeling and simulation of steel corrosion in 3D mesoscale reinforced concrete

Nguyen

Bary

Larrard

2015

Cement and Concrete Research

Self Cite

View full text Add to dashboard Cite

“…For this reason, only one FEM solution was computed. It contains 9.10 6 d. o. f and was provided y B. Bary, CEA, France 1. As we do not have other solution for finer meshes, we cannot conclude that this FEM solution is a reference solution, it is in this example only indicative.…”

Section: Numerical Examplesmentioning

confidence: 96%

“…A straightforward choice is the explicit meshing of all heterogeneities (see e.g. 1–3). It requires sophisticated 3D mesh softwares, and large computational times related to the meshing operation.…”

Section: Introductionmentioning

confidence: 99%

A multiple level set approach to prevent numerical artefacts in complex microstructures with nearby inclusions within XFEM

Tran

Yvonnet

et al. 2010

Numerical Meth Engineering

View full text Add to dashboard Cite

SUMMARYIn this paper, we highlight that when the extended finite element method (XFEM) is employed to model a microstructure in which inclusions are involved and the distance between two inclusions is small enough to be comparable with the mesh size, three numerical artefacts are induced, significantly affecting the convergence and accuracy of the numerical solution to the problem with such a microstructure. These artefacts are: (a) an artificial percolation of nearby inclusions; (b) an artificial distortion of phase domains; and (c) an enrichment deficiency. We propose to improve the XFEM/Level set method so as to avoid these artefacts. The new technique leading to this improvement uses one level set function for each inclusion and adds additional enrichment in an element whose support is cut by several interfaces. A local description of the multiple level sets is provided to avoid the storage of all level set functions. A simple integration rule is employed for numerical quadrature in elements cut by several interfaces. We show that the artefacts mentioned hereinbefore are circumvented in this framework. The performances of the method are demonstrated through benchmarks and examples applied to the homogenization of concrete materials in 2D and 3D cases.

show abstract

“…They have proved to provide relatively precise results, even in the case of high inclusion concentrations (see e.g. 21). When early‐age properties are considered, use is often made of the well‐known percolation phase features associated with the self‐consistent (SC) scheme 17–19.…”

Section: Drained Mechanical Parameters Of the Isotropic Microcrackmentioning

confidence: 99%

Ionic Liquids in Refinery Desulfurization: Comparison between Biphasic and Supported Ionic Liquid Phase Suspension Processes

et al. 2009

View full text Add to dashboard Cite

The desulfurization of fuel compounds in the presence of ionic liquids is reported. For this purpose, the desulfurization efficiency of a variety of imidazolium phosphate ionic liquids has been tested. Dibenzothiophene/dodecane and butylmercaptan/decane mixtures were used as model systems. Single-stage extractions reduced the sulfur content from 500 ppm to 200 ppm. In multistage extractions the sulfur content could be lowered to less than 10 ppm within seven stages. Regeneration of the ionic liquid was achieved by distillation or re-extraction procedures. Supported ionic liquid phase (SILP) materials, obtained by dispersing the ionic liquid as a thin film on highly porous silica, exhibited a significantly higher extraction performance owing to their larger surface areas, reducing the sulfur content to less than 100 ppm in one stage. Multistage extraction with these SILP materials reduced the sulfur level to 50 ppm in the second stage. The SILP technology offers very efficient utilization of ionic liquids and circumvents mass transport limitations because of the small film thickness and large surface area, and allows application of the simple packed-bed column extraction technique.

show abstract

Numerical and analytical effective elastic properties of degraded cement pastes

Cited by 33 publications

References 26 publications

Coupled carbonation-rust formation-damage modeling and simulation of steel corrosion in 3D mesoscale reinforced concrete

Coupled carbonation-rust formation-damage modeling and simulation of steel corrosion in 3D mesoscale reinforced concrete

A multiple level set approach to prevent numerical artefacts in complex microstructures with nearby inclusions within XFEM

Ionic Liquids in Refinery Desulfurization: Comparison between Biphasic and Supported Ionic Liquid Phase Suspension Processes

Contact Info

Product

Resources

About