Finite element modelling of permeability in brittle materials cracked in tension

Rahal, Saïd; Sellier, Alain; Casaux-Ginestet, Géraldine

doi:10.1016/j.ijsolstr.2016.12.023

Cited by 13 publications

(4 citation statements)

References 35 publications

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“…Using T c as transfer properties variable allows presenting the experimental results based on direct measurements only, without any assumptions concerning the crack geometry. Furthermore, in this way, experimental results can be easily used for validating mesoscopic and macroscopic numerical modeling strategies of fluid leakage in cracking concrete [23,22,10,15,20,3].…”

Section: Remarkmentioning

confidence: 99%

On the threshold crack opening effect on the intrinsic permeability of localized macro-cracks in concrete samples under Brazilian test conditions

Rastiello

Pont

Tailhan³

et al. 2018

Mechanics Research Communications

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The Brazilian (indirect tensile strength) test is widely adopted for studying the permeability evolution of single localized macro-cracks in concrete samples. In most of these studies, the existence of a threshold crack opening effect on the crack permeability is argued, in particular when permeability measurements are performed on previously cracked samples (i.e., on residual cracks). Based on recent experimental results obtained by Authors, the present contribution aims to show that performing permeability measurements in real-time with the crack opening process (i.e., under loading) ensures improving the results quality and makes their interpretation less ambiguous. It is shown that no threshold crack opening effect is detected in the explored range of crack opening displacement. Although presented results do not allow to conclude concerning the existence of such an effect, they point out several critical aspects concerning the interpretations usually provided. In particular, based on the comparison between present and reference results, it is proposed to interpret literature observations as a direct consequence of some artifacts inherent to standard experimental procedures, such as the impossibility of distinguishing between crack and porous medium contributions to the measured mass flow rate, crack re-closure due to unloading and/or self-healing phenomena, an inaccurate estimation of the crack opening displacement corresponding to flow measurements.

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Section: Remarkmentioning

confidence: 99%

On the threshold crack opening effect on the intrinsic permeability of localized macro-cracks in concrete samples under Brazilian test conditions

Rastiello

Pont

Tailhan³

et al. 2018

Mechanics Research Communications

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“…The FE method, which is based on meshing the body into small elements, has also successfully been employed for solving the water transport (Li et al 2017;Li et al 2016) as well as mechanical (Wang et al 2015; Xu and Chen 2016) problems at meso-scale level. Furthermore, the FE method has also been used --in the macro-scale modeling of water movement in concrete (Rahal et al 2016;Van Belleghem et al 2016;West and Holmes 2005).…”

Section: Finite Element (Fe) Modelmentioning

confidence: 99%

A Probabilistic Study on Hydraulic Conductivity of Concrete at Mesoscale

Baji

Yang³

2018

ACI Materials Journal

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Hydraulic conductivity of concrete can be used as a key indicator in assessment of service life of concrete structures. In this paper, a probabilistic investigation on hydraulic conductivity of concrete is conducted, allowing for variation in hydraulic properties of concrete constituents. Concrete is modeled as a three-phase composite at meso-scale, consisting of mortar, aggregates and the Interfacial Transition Zone (ITZ). A Finite Element (FE) method is developed to calculate the hydraulic conductivity of concrete, which is then verified using available experimental results. Based on a large pool of samples generated from Monte Carlo simulation, a conceptual model relating hydraulic conductivity of concrete to aggregate volume fraction ratio and hydraulic conductivity of mortar and the ITZ is proposed. It is shown from the probabilistic-based sensitivity analysis that hydraulic conductivity and thickness of the ITZ are amongst the most influential factors affecting the bulk hydraulic conductivity of concrete. It is also shown that for high aggregate volume fraction ratios, due to increasing volume of the ITZ, the coefficient of variation of hydraulic conductivity can be as high as 0.36.

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“…Accurately determining crack openings allows for better modeling of the hydro-mechanical behaviour of concrete, leading to improved assessments of its durability. Numerous studies have shown that permeability evolves with the opening of localized cracks [1]- [4]. Managing crack opening and reclosing is also crucial during cyclic loading of cracked structures, such as dealing with seasonal variations in water tank levels behind a dam or the effects of seismic events and wind.…”

Section: Introductionmentioning

confidence: 99%

Non-Local Anisotropic Damage Coupled To Plasticity

Tricoche,

Millard,

Morenon

et al. 2023

Proceedings of the 11th International Conference on Fracture Mechanics of Concrete and Concrete Structures

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In this paper, a novel approach is introduced for handling orthotropic plasticity coupled with damage, using second gradient formulations based on several directional diffusion tensors. This method automatically identifies the crack location and opening through the curvature of the non-local profiles of principal plastic strains. The paper includes an application demonstrating the numerical objectivity of the obtained solution.

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Finite element modelling of permeability in brittle materials cracked in tension

Cited by 13 publications

References 35 publications

On the threshold crack opening effect on the intrinsic permeability of localized macro-cracks in concrete samples under Brazilian test conditions

On the threshold crack opening effect on the intrinsic permeability of localized macro-cracks in concrete samples under Brazilian test conditions

A Probabilistic Study on Hydraulic Conductivity of Concrete at Mesoscale

Non-Local Anisotropic Damage Coupled To Plasticity

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