Numerical investigation on interface crack initiation and propagation behaviour of self-healing cementitious materials

Xue, Caihong; Li, Wengui; Li, Jianchun; Wang, Kejin

doi:10.1016/j.cemconres.2019.04.012

Cited by 32 publications

(21 citation statements)

References 45 publications

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“…According to the previous research [1,8,9,[11][12][13]21,22,26,27], the combination of the coupling method of fluid-solid in porous media [19] and the Cohesive Zone Method [12,13,24] has succeeded in simulating the expansion law of plane/interface cracks during hydraulic fracturing. Since the physical processes such as fluid-solid coupling, fluid mechanics, seepage, and rock deformation involved in the expansion of plane/interface cracks and body microcracks are basically the same, this method can also be used to simulate the extension law of body microcracks in the cement sheath.…”

Section: Numerical Simulation Methodsmentioning

confidence: 99%

“…Through previous experiments and field studies [3][4][5][6][7][8], we have learned that there are two main types of damages: one is the initial microcrack near the hole in the cement sheath body; and the other is the initial micro-annulus in the first or the second interface caused by the perforation impact. At present, most of the research papers are focused on the propagation of the initial micro-annulus in the first and the second interfaces and plane cracks in the formation rock, and prove that the initial micro-annulus has the phenomenon of expansion through experimental and numerical simulation methods [9][10][11][12][13][14][15][16][17][18][19]. Hou [20] et al studied the hydraulic fracture propagation of shale horizontal well by horizontal well by using a large-scale true triaxial physical simulation test.…”

Section: Introductionmentioning

confidence: 99%

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Numerical Simulation Study on Propagation of Initial Microcracks in Cement Sheath Body during Hydraulic Fracturing Process

Yan

et al. 2020

Energies

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Microcracks caused by perforating operations in a cement sheath body and interface have the potential to further expand or even cause crossflow during hydraulic fracturing. Currently, there are few quantitative studies on the propagation of initial cement-body microcracks. In this paper, a three-dimensional finite element model for the propagation of initial microcracks of the cement sheath body along the axial and circumferential directions during hydraulic fracturing was proposed based on the combination of coupling method of fluid–solid in porous media and the Cohesive Zone Method. The influence of reservoir geological conditions, the mechanical properties of a casing-cement sheath-formation system, and fracturing constructions in the propagation of initial axial microcracks of a cement sheath body was quantitatively analyzed. It can be concluded that the axial extension length of microcracks increased with the increase of elastic modulus of the cement sheath and formation, the flow rate of fracturing fluid, and casing internal pressure, and decreased with the increase of the cement sheath tensile strength and ground stress. The elastic modulus of the cement sheath had a greater influence on the expansion of axial cracks than the formation elastic modulus and casing internal pressure. The effect of fracturing fluid viscosity on the crack expansion was negligible. In order to effectively slow the expansion of the cement sheath body crack, the elastic modulus of the cement sheath can be appropriately reduced to enhance its toughness under the premise of ensuring sufficient strength of the cement sheath.

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Section: Numerical Simulation Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Numerical Simulation Study on Propagation of Initial Microcracks in Cement Sheath Body during Hydraulic Fracturing Process

Yan

et al. 2020

Energies

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“…To save the resources, energy, time, and costs associated with experimental testing when conducting scientific research, [1][2][3][4] numerical investigations have become an extremely effective discipline for studying the mechanical properties of materials [5][6][7][8] and structures 2,9 and have therefore been widely used by many researchers. 6,[10][11][12][13][14] The finite element method (FEM) was first proposed by Clough.…”

Section: Introductionmentioning

confidence: 99%

“…Among the many construction materials, concrete is investigated as it is one of the most highly used building materials. 4,41,42 Natural aggregate, the component of concrete with the largest proportion, is usually obtained through mining natural resources. Mining natural resources is finite, which means that the aggregate is not an inexhaustible source.…”

Section: Introductionmentioning

confidence: 99%

“…On the other hand, with the improvement in computer computing efficiency and the development of the FEM algorithm, the FEM has become an efficient method for studying the mechanical properties of RAC. 1,4,6,8,68 Meanwhile, it has proven to be an important approach to compensating for the shortages of experimental work, such as observing the expansion of internal cracks, reducing the test costs, and cutting down the test time. Xiao et al developed a nine aggregates model 3,8,65 and a lattice model 13 to study the fracture process of RAC.…”

Section: Introductionmentioning

confidence: 99%

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Base force element method based on the complementary energy principle for the damage analysis of recycled aggregate concrete

Wang

Peng

Kamel

et al. 2019

Numerical Meth Engineering

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Summary The finite element method (FEM) is an effective approach for exploring the failure mechanism of heterogeneous materials. According to the complementary energy principle, the use of FEM might suffer from several difficulties in terms of keeping the elements and their boundaries balanced, as well as finding interpolation functions. In this study, we introduced an efficient approach to researching the failure mechanism of the material, named base force element method (BFEM), according to complementary energy principle. Specifically, the element compliance matrix of an arbitrary quadrilateral element with four mid‐edge nodes was expressed based on the complementary energy principle. Then, the node displacement was obtained by the governing equation using the Lagrange multiplier method. In addition, both the compliance matrix and the node displacement were represented as explicit expressions without the use of Gaussian integration. A numerical model of the recycled aggregate concrete (RAC) was established according to the Monte Carlo method. A comparative sample of the digital image model was also established using digital image technology. The influences of substituting recycled aggregate and the relative mechanical properties of adhered mortar to those of new mortar on the failure mechanism of RAC were studied. The simulation results indicated that the BFEM is an effective approach to researching the damage mechanism of heterogeneous materials.

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Numerical and Experimental Investigation on the Self‐Healing Potential of Interpenetrating Metal–Ceramic Composites

et al. 2023

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An interpenetrating metal ceramic composite (IMCC) has been investigated regarding the potential as well as the feasibility of self‐healing. Triggered by heating, cracks in the damaged composite located mainly in the Al2O3 ceramic or at the interface could be filled and closed by the liquid AlSi10Mg metal alloy. This healing procedure promises to reduce stress concentrations at crack tips and to improve the mechanical properties compared to the predamaged composite. Two different numerical approaches have been introduced to investigate this assumption and the potential of self‐healed IMCCs for a best case scenario: 1) A simple 2D model to analyze the reduction of stress concentrations in front of a crack tip within the ceramic due to healing and 2) a 3D model based on CT‐scan reconstructed microstructures to study how macroscopic mechanical properties can be restored depending on the amount of predamage. Further, the self‐healing approach has been investigated experimentally for the same composite. Despite the fact that experimental self‐healing of the investigated IMCC is only moderately feasible so far, the study shows the great potential that can still be exploited in order to extend the service life time of IMCC engineering components.

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Numerical investigation on interface crack initiation and propagation behaviour of self-healing cementitious materials

Cited by 32 publications

References 45 publications

Numerical Simulation Study on Propagation of Initial Microcracks in Cement Sheath Body during Hydraulic Fracturing Process

Numerical Simulation Study on Propagation of Initial Microcracks in Cement Sheath Body during Hydraulic Fracturing Process

Base force element method based on the complementary energy principle for the damage analysis of recycled aggregate concrete

Numerical and Experimental Investigation on the Self‐Healing Potential of Interpenetrating Metal–Ceramic Composites

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