Blast induced fracture modelling using smoothed particle hydrodynamics

Gharehdash, Saba; Barzegar, Milad; Palymskiy, I. B.; Fomin, P. A.

doi:10.1016/j.ijimpeng.2019.02.001

Cited by 68 publications

(58 citation statements)

References 42 publications

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“…Zhang et al [23] established the numerical model of projectiles impacting the concrete targets using the SPH method and studied the dynamic failure of concrete. Saba et al [24] simulated the failure process of granite under blasting based on the SPH method and analyzed the failure characteristics and expansion of cracks. Above numerical simulation studies provide the technical reference for establishing the numerical model of water jet impacting SFRC.…”

Section: Introductionmentioning

confidence: 99%

Breaking Mechanism and Damage Evolution Rule of Ultra‐High‐Pressure Water Jet Impacting Steel Fiber Reinforced Concrete

Chen

Zhu

2021

Advances in Civil Engineering

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Based on smooth particle hydrodynamics (SPH) method, this paper carried out the numerical simulation of ultra-high-pressure water jet (UHP-WJ) impacting steel fiber reinforced concrete (SFRC), verified the established numerical model by UHP-WJ impacting SFRC and computed tomography (CT) scanning experiments, and explored breaking mechanism and damage evolution rule of SFRC impacted by UHP-WJ. Results indicate that in the weak effect zone of steel fiber, the failure of concrete is generated and developed along the axial direction of UHP-WJ into a bowl-shaped crater with the combining action of compressive stress and shear stress. In the affected area of steel fiber, due to the inhomogeneity in the contact area of steel fiber and concrete, the stress concentration in the contact area is produced, causing the formation of propagated crack along the steel fiber. And the steel fiber has an obstruction effect on the development of broken bodies on the upper and lower sides of steel fiber. With the sustained action of UHP-WJ, the steel fiber in the intense radiation area of stress waves takes place fracture and finally the broken bodies on the upper and lower sides of steel fiber fuse. In addition, based on the CT scans and digital image processing technology, this paper also comparatively analyzed the internal fragmentations of SFRC and the ordinary concrete subjected to UHP-WJ impact, and it is found that compared with the ordinary concrete, there is smaller dimension of crater and it is difficult to engender macrocrack for SFRC, with lower damage and higher damage attenuation speed along the axial and radial directions.

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Section: Introductionmentioning

confidence: 99%

Breaking Mechanism and Damage Evolution Rule of Ultra‐High‐Pressure Water Jet Impacting Steel Fiber Reinforced Concrete

Chen

Zhu

2021

Advances in Civil Engineering

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“…To date, there has been limited investigations on the effect of blast-induced fractures on the permeability of rocks. Various methods such as theoretical analysis (Li and Xue, 2000; Guo et al , 2014; Li et al , 2018; Li et al , 2018; Hou et al , 2019), experimental works (Moody, 1978; Butkovich et al , 1979; McHugh and Keough, 1982; Cunderman and Northrop, 1986; Zhu et al , 2016; Yang et al , 2019; Venkatesh et al , 2019) and numerical studies (Carter, 1978; Grady et al , 1980; Adams et al , 1981; Zhu et al , 2013; Jordan et al , 2015; Ye et al , 2017; Yuan et al , 2018; Gharehdash, 2019; Gharehdash et al , 2020) have been suggested to consider the permeability improvement using blast fracturing. Each of these approaches has been discussed in detail following.…”

Section: Introductionmentioning

confidence: 99%

“…However, limited computational studies have addressed the hydraulic behavior of blast-induced fractures. Advances in this field have come from experiments associated with the permeability of rocks (Carter, 1978; Grady et al , 1980; Adams et al , 1981; Zhu et al , 2013; Jordan et al , 2015; Ye et al , 2017; Yuan et al , 2018; Gharehdash, 2019; Gharehdash et al , 2020). Therefore, it is desirable to determine a validated computational method for predicting topology and permeability of blast-induced fractures.…”

Section: Introductionmentioning

confidence: 99%

Topology and hydraulic permeability estimation of explosively created fractures through regular cylindrical pore network models

Gharehdash

Sainsbury

Barzegar

et al. 2021

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Purpose This research study aims to develop regular cylindrical pore network models (RCPNMs) to calculate topology and geometry properties of explosively created fractures along with their resulting hydraulic permeability. The focus of the investigation is to define a method that generates a valid geometric and topologic representation from a computational modelling point of view for explosion-generated fractures in rocks. In particular, extraction of geometries from experimentally validated Eulerian smoothed particle hydrodynamics (ESPH) approach, to avoid restrictions for image-based computational methods. Design/methodology/approach Three-dimensional stabilized ESPH solution is required to model explosively created fracture networks, and the accuracy of developed ESPH is qualitatively and quantitatively examined against experimental observations for both peak detonation pressures and crack density estimations. SPH simulation domain is segmented to void and solid spaces using a graphical user interface, and the void space of blasted rocks is represented by a regular lattice of spherical pores connected by cylindrical throats. Results produced by the RCPNMs are compared to three pore network extraction algorithms. Thereby, once the accuracy of RCPNMs is confirmed, the absolute permeability of fracture networks is calculated. Findings The results obtained with RCPNMs method were compared with three pore network extraction algorithms and computational fluid dynamics method, achieving a more computational efficiency regarding to CPU cost and a better geometry and topology relationship identification, in all the cases studied. Furthermore, a reliable topology data that does not have image-based pore network limitations, and the effect of topological disorder on the computed absolute permeability is minor. However, further research is necessary to improve the interpretation of real pore systems for explosively created fracture networks. Practical implications Although only laboratory cylindrical rock specimens were tested in the computational examples, the developed approaches are applicable for field scale and complex pore network grids with arbitrary shapes. Originality/value It is often desirable to develop an integrated computational method for hydraulic conductivity of explosively created fracture networks which segmentation of fracture networks is not restricted to X-ray images, particularly when topologic and geometric modellings are the crucial parts. This research study provides insight to the reliable computational methods and pore network extraction algorithm selection processes, as well as defining a practical framework for generating reliable topological and geometrical data in a Eulerian SPH setting.

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“…Mesh-based methods can be effectively used but must consider additional factors when dealing with large deformation in the model, e.g., regularization, erosion criteria, softening, and remeshing [24][25][26]. The problem of significant element distortion can be omitted by using different methods, e.g., the arbitrary Lagrangian-Eulerian (ALE) formulation [15,18,27], discrete element method (DEM) [28,29] or mesh-free methods like smooth particle hydrodynamics (SPH) [23,30]. It is also possible to couple different techniques; such an approach has proved efficient and reliable in the case of blast-induced brittle fracture [17,23,28], as well as other engineering problems [31][32][33].…”

Section: Introductionmentioning

confidence: 99%

Experimental testing and numerical simulations of blast-induced fracture of dolomite rock

et al. 2020

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In this paper, the Johnson-Holmquist II (JH-2) model with parameters for a dolomite rock was used for simulating rock fragmentation. The numerical simulations were followed by experimental tests. Blast holes were drilled in two different samples of the dolomite, and an emulsion high explosive was inserted. The first sample was used to measure acceleration histories, and the cracking pattern was analyzed to perform a detailed study of the blastinduced fracture to validate the proposed method of modelling and to analyze the capability of the JH-2 model for the dolomite. The second sample was used for further validation by scanning the fragments obtained after blasting. The geometries of the fragments were compared with numerical simulations to further validate the proposed method of modelling and the implemented material model. The outcomes are promising, and further study is planned for simulating and optimizing parallel cut-hole blasting.

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Blast induced fracture modelling using smoothed particle hydrodynamics

Cited by 68 publications

References 42 publications

Breaking Mechanism and Damage Evolution Rule of Ultra‐High‐Pressure Water Jet Impacting Steel Fiber Reinforced Concrete

Breaking Mechanism and Damage Evolution Rule of Ultra‐High‐Pressure Water Jet Impacting Steel Fiber Reinforced Concrete

Topology and hydraulic permeability estimation of explosively created fractures through regular cylindrical pore network models

Experimental testing and numerical simulations of blast-induced fracture of dolomite rock

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