A three-dimensional meso-scale modelling of concrete fracture, based on cohesive elements and X-ray μCT images

Trawiński, W.; Tejchman, J.; Bobiński, Jerzy

doi:10.1016/j.engfracmech.2017.10.003

Cited by 114 publications

(42 citation statements)

References 51 publications

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“…The predicted results have applications for the numerical fracture modelling of mortar or concrete at the meso-scale. At this scale, the interface properties between the aggregate and the bulk cement paste matrix are important parameters, and it is concluded that global mechanical behaviour of the modelled material is dominated by the local mechanical properties of the interface [59]. Thus, the results reported in this work offer the reference for choosing the constitutive law of this feature in the numerical model.…”

Section: Discussionmentioning

confidence: 79%

Experimentally informed fracture modelling of interfacial transition zone at micro-scale

Zhang

Gan

et al. 2019

Cement and Concrete Composites

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The aim of this work is to predict the micromechanical properties of interfacial transition zone (ITZ) by combining experimental and numerical approaches. In the experimental part, hardened cement paste (HCP) cantilevers (200 μm × 100 μm × 100 μm) attached to a quartzite aggregate were fabricated and tested using microdicing saw and nanoindenter, respectively. In the modelling, comparable digital specimens were produced by the X-ray computed tomography (XCT) and tested by a discrete lattice model. The fracture model was calibrated by the experimental load-displacement curves and can reproduce the experimental observations well. In the end, the calibrated model was used to predict the mechanical behaviour of ITZ under uniaxial tension, which can be further used as input for the multi-scale analysis of concrete.

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Section: Discussionmentioning

confidence: 79%

Experimentally informed fracture modelling of interfacial transition zone at micro-scale

Zhang

Gan

et al. 2019

Cement and Concrete Composites

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“…To elaborate the microstructures of these materials, many researchers develop reconstruction methods to generate finite element (FE) meshes from digital images. [4][5][6][7][8][9][10][11][12][13][14][15][16][17]. Mainly, these reconstruction methods can be classified into two categories [18]: based on geometry and pixel method.…”

Section: Introductionmentioning

confidence: 99%

“…In the geometry-based method [12,13,17], there are two steps to reconstruct the FE mesh from digital images. Firstly, different components of material (e.g., particles and matrix) are segmented and the corresponding geometric models (body or surface) are generated using commercial software or in-house program.…”

Section: Introductionmentioning

confidence: 99%

An Image-Based Double-Smoothing Cohesive Finite Element Framework for Particle-Reinforced Materials

Bai

Xie

et al. 2020

Mathematics

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In order to simulate the fracture process of particle-reinforced materials on the micro-scale, an image-based double-smoothing cohesive finite element framework is proposed in the present paper. Two separate smoothing processes are performed to reduce the noise in the digital image and eliminate the jagged elements in the finite element mesh. The main contribution of the present study is the proposed novel image-based cohesive finite element framework, and this method improved the quality of the meshes effectively. Meanwhile, the artificial resistance due to the jagged element is reduced with the double-smoothing cohesive finite element framework during the crack propagation. Therefore, the image-based double-smoothing cohesive finite element framework is significant for the simulation of fracture mechanics.

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“…The cohesive zone model has been frequently adopted in the simulation of the concrete failure problem and proved to be feasible in concrete tension fracture simulation [23][24][25][26][27][28]. However, very few studies report its application in concrete compression simulation, which has a more complex damage evolution in the fracture process [29].…”

Section: Introductionmentioning

confidence: 99%

Meso-Scale Simulation of Concrete Based on Fracture and Interaction Behavior

Xiong

Xiao

2019

Applied Sciences

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Based on the cohesive zone model, a meso-scale model is developed for numerical studies of three-phase concrete under tension and compression. The model is characterized by adopting mixed-mode fracture and interaction behavior to describe fracture, friction and collision in tension and compression processes. The simulation results match satisfactorily with the experimental results in both mechanical characteristics and failure mode. Whole deformation and crack propagation process analyses are conducted to reveal damage evolution of concrete. The analyses also set a foundation for the following parametric studies in which mode II fracture energy, material parameter, frictional angle and aggregates’ mechanical characteristics are considered as variables. It shows that the mixed-mode fracture accounts for a considerable proportion, even in tension failure. Under compression, the frictional stress can constrain crack propagation at the beginning of the damage and reestablish loading path during the softening stage. Aggregates’ mechanical characteristics mainly affect concrete’s performance in the mid-and-late softening stage.

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A three-dimensional meso-scale modelling of concrete fracture, based on cohesive elements and X-ray μCT images

Cited by 114 publications

References 51 publications

Experimentally informed fracture modelling of interfacial transition zone at micro-scale

Experimentally informed fracture modelling of interfacial transition zone at micro-scale

An Image-Based Double-Smoothing Cohesive Finite Element Framework for Particle-Reinforced Materials

Meso-Scale Simulation of Concrete Based on Fracture and Interaction Behavior

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