Multiscale modeling of the effect of the interfacial transition zone on the modulus of elasticity of fiber-reinforced fine concrete

Zhang, Jiaolong; Liu, X.; Yuan, Yong; Mang, Herbert A.

doi:10.1007/s00466-014-1081-6

Cited by 26 publications

(7 citation statements)

References 56 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In addition, a two-step homogenization approach for FRC was developed with special emphasis on the interfacial transition zone (ITZ). The elastic properties of FRC predicted by this model were in good agreement with experimental results (Gal and Kryvoruk, 2011;Zhang et al, 2015). However, the main drawback of both analytical and finite element models is that they cannot consider the realistic situation of three-dimensional (3D) heterogeneous particles, including shapes, size distribution, and random orientation due to simplifications necessary for analytical derivations.…”

Section: Introductionsupporting

confidence: 65%

Micro-CT-based micromechanics and numerical homogenization for effective elastic property of ultra-high performance concrete

Luo

Liu

Qiao

et al. 2019

International Journal of Damage Mechanics

View full text Add to dashboard Cite

A computational homogenization model using microstructures obtained from X-ray micro-CT is developed to estimate the porosity-based elastic properties of ultra-high performance concrete under freeze–thaw action. The model is transformed directly from micro-CT which is capable of reflecting realistic distribution of porosity and heterogeneities inside the ultra-high performance concrete. Factors are taken into consideration, including the determination of representative volume element, the position and numbers of representative volume element cubes, fiber orientation, image resolution, applied filter, and pore distribution. The relationship between the material internal structure and freeze–thaw resistance is studied at micro-scale. The volume-averaged homogenization approach is applied to calculate the effective properties of the ultra-high performance concrete which are compared with experimental data. It is demonstrated that the proposed model provides an effective tool to evaluate the elastic properties of the ultra-high performance concrete based on microstructural characterization data.

show abstract

Section: Introductionsupporting

confidence: 65%

Micro-CT-based micromechanics and numerical homogenization for effective elastic property of ultra-high performance concrete

Luo

Liu

Qiao

et al. 2019

International Journal of Damage Mechanics

View full text Add to dashboard Cite

show abstract

“…While popular because of their simplicity, these techniques are not adequately accurate when large contrast in constituent properties exist, or the volume fractions of the dispersed components are very high [18][19][20]. Computational techniques generally overcome these drawbacks [20][21][22][23][24][25][26].…”

Section: Introductionmentioning

confidence: 99%

Microstructure-guided numerical simulations to predict the thermal performance of a hierarchical cement-based composite material

Das

Aguayo

Rajan

et al. 2018

Cement and Concrete Composites

View full text Add to dashboard Cite

This paper presents a microstructure-guided numerical homogenization technique to predict the effective thermal conductivity of a hierarchical cement-based material containing phase change material (PCM)-impregnated lightweight aggregates (LWA). Porous inclusions such as lightweight aggregates embedded in a cementitious matrix are filled with multiple fluid phases including phase change material to obtain desirable thermal properties for building and infrastructure applications.Simulations are carried out on realistic three-dimensional microstructures generated using pore structure information. An inverse analysis procedure is used to extract the intrinsic thermal properties of those microstructural components for which data is not available. The homogenized heat flux is predicted for an imposed temperature gradient from which the effective composite thermal conductivity is computed. The simulated effective composite thermal conductivities are found to correlate very well with experimental measurements for a family of composites considered in the paper. Comparisons with commonly used analytical homogenization models show that the microstructure-guided simulation approach provides superior results for composites exhibiting large property contrast between phases. By linking the microstructure and thermal properties of hierarchical materials, an efficient framework is available for optimizing the material design to improve thermal efficiency of a wide variety of heterogeneous materials.

show abstract

“…Although widely used to study composite materials, its application to cementitious materials is limited. Recently a few two-step homogenisation approaches have been developed for FRC [26,27], in which the inclusions (fibres and aggregates) and surrounding interfacial zone are homogenised first using Gaboczi's analytical method [28], and the homogenised inclusions are then integrated with the mortar matrix to predict overall elastic properties of FRC using numerical homogenisation. In these studies, the material's micro-structures used in the second step are generated using statistical algorithms with inclusions of simplified shapes and distributions, and little attention is paid to the effects of pores which exist intrinsically in cementitious composites.…”

Section: Introductionmentioning

confidence: 99%

Micro X-ray computed tomography image-based two-scale homogenisation of ultra high performance fibre reinforced concrete

Qsymah

Sharma

Yang

et al. 2017

Construction and Building Materials

View full text Add to dashboard Cite

A two-scale analytical-numerical homogenisation approach is developed to predict effective elastic properties of ultra high performance fibre reinforced concrete considering distribution of pore sizes acquired from 3D micro X-ray computed tomography (μXCT) images of 24.8μm resolution. In the first scale, the mortar, consisting of sand, cement paste and a large number of small pores (10-600μm), is homogenised using analytical Mori-Tanaka method with constituents' moduli from micro-indentation. In the second, μXCT images of a 20mm cube are converted to mesoscale representative volume elements for finite element homogenisation, with fibres and a small number of large pores (≥600μm) in the homogenised mortar. The resultant elastic moduli are compared favourably with experimental data. This approach accounts for a large number of pores with a wide size range yet without excessive computational cost. Effects of fibre volume fraction and orientation are investigated, demonstrating the approach's potential to optimise the material's micro-structure for desired properties.

show abstract

Multiscale modeling of the effect of the interfacial transition zone on the modulus of elasticity of fiber-reinforced fine concrete

Cited by 26 publications

References 56 publications

Micro-CT-based micromechanics and numerical homogenization for effective elastic property of ultra-high performance concrete

Micro-CT-based micromechanics and numerical homogenization for effective elastic property of ultra-high performance concrete

Microstructure-guided numerical simulations to predict the thermal performance of a hierarchical cement-based composite material

Micro X-ray computed tomography image-based two-scale homogenisation of ultra high performance fibre reinforced concrete

Contact Info

Product

Resources

About