XFEM modeling for curved fracture in the anisotropic fracture toughness medium

Gao, Yue; Liu, Zhanli; Wang, Tao; Zeng, Qiang; Li, Xiang; Zhuang, Zhuo

doi:10.1007/s00466-018-1627-0

Cited by 17 publications

(2 citation statements)

References 38 publications

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“…Apart from experimental studies, the numerical method can be used to determine the fracture properties of composites. Among these numerical methods, the “Extended Finite Element Method” and “Bezier Multi-Step Method” can provide more reliable results [ 24 , 25 ].…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation of Cracking and Impact Resistance of Polymer- and Fiber-Enhanced Concrete for Ultra-Thin Whitetopping

Chen¹,

Zheng²,

Li³

et al. 2022

Polymers

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In order to investigate the effectiveness of polymer modification and fiber reinforcement on the cracking and impact resistance of concrete materials prepared for ultra-thin whitetopping (UTW), carboxyl butyl benzene latex and polyformaldehyde fibers were added to the conventional cement concrete mix. In addition, test methods that used an asphalt mixture performance tester (AMPT) and mechanical rammer were developed to evaluate concrete cracking and impact resistance, respectively. Results from the AMPT test revealed that the cracking resistance can be enhanced with polymer and fiber, especially the initial tensile load peak, which can be improved by more than 40% when fiber and polymer compound modification is applied. Meanwhile, the impact loading test revealed that the inclusion of both fiber and polymer results in a two-fold increase in the number of impacts before visible cracking occurs, and the number of blows to failure increased by 21.4%. Moreover, microstructures were investigated by scanning electron microscopy (SEM) to confirm the reinforcing mechanism of both polymer modification and fiber reinforcement.

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Section: Introductionmentioning

confidence: 99%

Experimental Investigation of Cracking and Impact Resistance of Polymer- and Fiber-Enhanced Concrete for Ultra-Thin Whitetopping

Chen¹,

Zheng²,

Li³

et al. 2022

Polymers

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“…Hydraulic fracture deflection sensitivity is analyzed and it is found that fracture spacing is one of the most important parameter when dealing with multiple hydraulic fractures. Gao et al 40 . also use xFEM to analyze the effect of anisotropy of fracture toughness.…”

Section: Introductionmentioning

confidence: 99%

Hydraulic fracture propagation barriers induced by weak interfaces in anisotropic rocks

Celleri¹,

Sánchez²

2021

Num Anal Meth Geomechanics

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In the Oil&Gas industry, hydraulic fracturing is a technique that makes unconventional reservoirs economically viable. Despite the high impact of the stimulation processes on the productivity of the wells, hydraulic fractures are modeled assuming vertical and planar propagation in most cases. In Argentina, Vaca Muerta formation is the most important unconventional reservoir. It is predominately in a strike‐slip stress regime with areas in thrust regime, and has also strong elastic anisotropy with widely spread sub‐horizontal mechanical discontinuities such as calcitic veins or ash beds, that could act as preferential propagation paths. The effect of these heterogeneities on the fracture propagation, typically underestimated, is a key issue to model the hydraulic fracture geometry, to estimate the stimulated volume, and to optimize production under these complex mechanical conditions. In this work, we use a coupled fluid ‐ rock mechanics model that accounts for elastic anisotropy and weak discontinuities to study the fracture height growth. Fracture initiation and propagation are modeled using a Discontinuous Galerkin (DG) finite elements formulation with a softening Cohesive Zone Model (CZM). We analyze Vaca Muerta formation representative mechanical properties and provide some fundamentals on typical field problems like vertical containment induced by lamination and layering or horizontal fracture propagation with their consequent loss of productivity. We find, for typical Vaca Muerta formation conditions, that not only the weak bedding strength controls the height propagation of the hydraulic fracture but also the degree of anisotropy plays an important role under harsh stress regimes and high heterogeneity of the formation.

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Fracture toughness analysis of interlocked brick and mortar structure considering the anisotropic behavior

Nie

Luo

2023

Arch Appl Mech

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XFEM modeling for curved fracture in the anisotropic fracture toughness medium

Cited by 17 publications

References 38 publications

Experimental Investigation of Cracking and Impact Resistance of Polymer- and Fiber-Enhanced Concrete for Ultra-Thin Whitetopping

Experimental Investigation of Cracking and Impact Resistance of Polymer- and Fiber-Enhanced Concrete for Ultra-Thin Whitetopping

Hydraulic fracture propagation barriers induced by weak interfaces in anisotropic rocks

Fracture toughness analysis of interlocked brick and mortar structure considering the anisotropic behavior

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