A combined XFEM–damage mechanics approach for concrete crack propagation

Roth, Simon-Nicolas; Léger, Pierre; Soulaïmani, Azzeddine

doi:10.1016/j.cma.2014.10.043

Cited by 110 publications

(51 citation statements)

References 29 publications

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“…Prisco et al 2000, Unger et al 2007, DeJong et al 2008, Roth et al 2015 simulating the same test and can be possibly attributed to the experimental problems previously described. -32 - -33 -…”

Section: Load-path 4amentioning

confidence: 91%

A crack-tracking technique for localized cohesive–frictional damage

Saloustros

Pelà

Cervera

2015

Engineering Fracture Mechanics

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-This paper extends the use of crack-tracking techniques within the smeared crack approach for the numerical simulation of cohesive-frictional damage on quasi-brittle materials. The mechanical behaviour is described by an isotropic damage model with a Mohr-Coulomb failure surface. The correct crack propagation among the two alternative fracture planes proposed by the Mohr-Coulomb theory is selected with the use of an energy criterion based on the total elastic strain energy. The simulation of three benchmark problems of mixed-mode fracture in concrete demonstrates that the proposed methodology can reproduce the material's frictional characteristics, showing robustness, as well as mesh-size and mesh-bias independence.

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Section: Load-path 4amentioning

confidence: 91%

A crack-tracking technique for localized cohesive–frictional damage

Saloustros

Pelà

Cervera

2015

Engineering Fracture Mechanics

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“…Following the approach proposed in [14], conservation will be enforced using mode I energy dissipation. The three conditions required for the conservation of energy during transition are:…”

Section: Transition From Continuous Damage Mechanics To Cohe-sive Xfemmentioning

confidence: 99%

“…In the presence of a discontinuity, equation (2) is solved using a combined XFEM-damage mechanics approach [14] for which the three dimensional formulation is given in section 3. Equation (3) can be solved either using a segregated or a coupled algorithm.…”

Section: Coupled Hydro-mechanical Problem Considering Mate-rial Damagmentioning

confidence: 99%

“…The transition from CDM to XFEM is achieved when d > d crit . According to [14], d crit is chosen such that 0.5 ≤ d crit ≤ 0.7.…”

Section: Transition From Continuous Damage Mechanics To Cohe-sive Xfemmentioning

confidence: 99%

“…When the damage has reached a critical value, a switch to the cohesive XFEM model is achieved by ensuring that the fracture energy that remains to be dissipated by the CPDM model is transferred to the XFEM model [14]. The XFEM formulation makes possible the computation of the crack aperture as well as the application of pressure on the crack surfaces for simulation of hydraulic fracture initiation and propagation.…”

Section: Introductionmentioning

confidence: 99%

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Coupled Hydro-Mechanical Cracking of Concrete using XFEM in 3D

Roth¹,

Léger

Soulaïmani

2016

Proceedings of the 9th International Conference on Fracture Mechanics of Concrete and Concrete Structures

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Abstract. This paper presents a computational method for simulation of 3D hydrofracturation using a segregated and a coupled algorithm hydraulic model. The crack propagation is modeled using a combination of continuous damage and XFEM. The poroelastic problem in the first stage of cracking is modeled using a poro-damage model, where the permeability is linked to the damage coefficient. Once the crack is modeled using XFEM, a hydraulic mesh is automatically generated on the fracture surface with the possibility of including features such as drains. The pressure is computed on the hydraulic mesh taking into account the crack opening computed with the structural model and the different types of flow in a crack: laminar or turbulent, parallel or non-parallel. The pressure computed with the hydraulic mesh is transferred to the structural mesh to recompute the structural response. This procedure, iterated until convergence, can predict hydraulic fracturing taking into account complex flows. A validation example on a wedge-splitting specimen is presented.

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Enabling Extreme Fast‐Charging: Challenges at the Cathode and Mitigation Strategies

Tanim

Weddle

Yang

et al. 2022

Advanced Energy Materials

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Charging lithium‐ion batteries (LiBs) in 10 to 15 min via extreme fast‐charging (XFC) is important for the widespread adoption of electric vehicles (EVs). Lately, the battery research community has focused on identifying XFC bottlenecks and determining novel design solutions. Like other LiB components, cathodes can present XFC bottlenecks, especially when considering long‐term battery life. Therefore, it is necessary to develop a comprehensive understanding of how XFC conditions degrade LiB cathodes. The present article reviews relevant cathode‐focused studies and summarizes the current understanding regarding cathode performance and aging issues under XFC conditions. Dominant aging modes and mechanisms are identified at different length‐scales with electrochemical correlations for LiNixMnyCozO2 (NMC)‐based cathodes. A range of electrochemical techniques and models provide key insights into cathode performance and life issues. A suite of multimodal and multiscale microscopy and X‐ray techniques is surveyed to quantify chemical, structural, and crystallographic NMC‐cathode degradation. Cathode cycle‐life is scaled to equivalent EV miles to illustrate how cathode degradation translates to real‐world scenarios and quantifies cathode‐related bottlenecks that hinder XFC adoption. Finally, the article discusses several cathode cycle‐life aging mitigation strategies with example case studies and identifies remaining challenges.

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A combined XFEM–damage mechanics approach for concrete crack propagation

Cited by 110 publications

References 29 publications

A crack-tracking technique for localized cohesive–frictional damage

A crack-tracking technique for localized cohesive–frictional damage

Coupled Hydro-Mechanical Cracking of Concrete using XFEM in 3D

Enabling Extreme Fast‐Charging: Challenges at the Cathode and Mitigation Strategies

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