A comparative study on the crack development in rock-like specimens containing unfilled and filled flaws

Sharafisafa, Mansour; Aliabadian, Zeinab; Tahmasebinia, Faham; Shen, Luming

doi:10.1016/j.engfracmech.2020.107405

Cited by 49 publications

(18 citation statements)

References 76 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The pyrite band, as a typical geological discontinuity unit, is sound developed in marble of the Jiama open pit mine of China. Although plenty of efforts have been performed to reveal the effects of the preexisting flaws, such as preflaws, bedding plane, interbeds, and joints, on rock failure [5,9,31,36], the primary pyrite band on rock geomechanical behaviors is not well understood. Especially, for pyrite-filled rock in cold regions, the influence of freeze-thaw cycle on rock structural deterioration and failure evolution is poorly revealed.…”

Section: Discussionmentioning

confidence: 99%

“…For example, there are two three-dimensional points (M and N) on the same projective ray and the same projective point (M) on the image plane 1. There is an infinite number of threedimensional points that correspond to the projective point M. If there are two projective points (m, m ′ ), then the only point corresponds to m. Similarly, projective points (m, n ′ ) correspond to a unique point N. After taking a series of images of the surface pattern, the first image was regarded as the reference image (undeformed) [33][34][35][36]. The subsequent images were regarded as the deformed images.…”

Section: Testing Procedures the Pyrite-filled Marble Obtainedmentioning

confidence: 99%

See 1 more Smart Citation

On the Fracture Evolution and Instability of Pyrite-Filled Marble Exposed to Freeze-Thaw-Compression Loads

Yü

Yang

Zhu³

et al. 2021

Lithosphere

View full text Add to dashboard Cite

The preexistence of the geological discontinuities in cold regions is susceptible to freeze-thaw weathering and rock instability, and even the occurrence of geological hazards is strongly impacted by the discontinuities. Knowledge of how natural fracture affects the rock field deformation is crucial to rock stability prediction. This work is aimed at revealing the influences of freeze-thaw on failure process for pyrite-filled marble obtained from an open pit slope. All the tested marbles were selected to roughly have the same initial pyrite band; the full-field displacement and the progressive failure behaviors under uniaxial compression were qualitatively and quantitatively analyzed using 3D digital image correlation (3D DIC) technique. The testing results show that the previous freeze-thaw action weakens the cementation between the rock matrix and pyrite band; the peak stress and strain are obviously impacted by the freeze-thaw treatment. In addition, the stimulation of pyrite bands influences the displacement development and high strain concentration pattern. The stimulation of pyrite band results in the formation of strain concentration zone, and shear sliding occurs until rock failure. Moreover, it is found that the stimulation of pyrite band and its localized strain takes place progressively and develops fast for marble exposed to higher freeze-thaw treatment. It is suggested that the field deformation development depends on the stimulation of the pyrite bands.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Testing Procedures the Pyrite-filled Marble Obtainedmentioning

confidence: 99%

On the Fracture Evolution and Instability of Pyrite-Filled Marble Exposed to Freeze-Thaw-Compression Loads

Yü

Yang

Zhu³

et al. 2021

Lithosphere

View full text Add to dashboard Cite

show abstract

“…Compared with the traditional laboratory specimens containing joints and fissures, the 3DP method allows for the repetitive preparation of rock specimens with the same structures. For example, several studies have used 3DP methods to prepare specimens with single and multiple fractures and studied the mechanical and failure properties of rock specimens under different loading conditions (Table 3) [82][83][84][85].…”

Section: Repetitive Preparation Of Rock Mass With Complexmentioning

confidence: 99%

Application of 3D Printing Technology in the Mechanical Testing of Complex Structural Rock Masses

et al. 2021

View full text Add to dashboard Cite

In the engineering of underground construction, the discontinuous structures in rock mass have important influences on the mechanical behaviors of the subsurface of rock mass. The acquisition of mechanical parameters is the basis of rock mass engineering design, construction, safety, and stability evaluation. However, the mechanical parameters and failure characteristics of the same rock mass under different mechanical conditions cannot be obtained due to the limitations of specimen preparation techniques. In recent years, with the continuous development of 3D printing (3DP) technology, it has been successfully applied to the repetitive preparation of rock mass samples. The combinations of 3DP and other techniques, such as 3D scanning and CT scanning, provided a new approach to study the mechanical behavior of complex structural rock masses. In this study, through a comprehensive review of the technical progress, equipment situation, application fields, and challenges of the use of 3DP technology, the following conclusions were obtained: (1) 3DP technology has advantages over traditional rock mass specimen preparation techniques, and the verification of test results using 3D printed samples shows that the 3DP has broad application prospects in geotechnical engineering. (2) The combination of 3DP and other advanced techniques can be used to achieve the accurate reconstruction of complex structural rock masses and to obtain the mechanical and failure characteristics of the same rock mass structure under different mechanical boundary conditions. (3) The development of 3DP materials with high strength, high brittleness, and low ductility has become the major bottleneck in the application of 3DP in geotechnical engineering. (4) 3D printers need to meet the high precision and large size requirements while also having high strength and long-term printing ability. The development of 3D printers that can print different types of materials is also an important aspect of the application of 3DP in geotechnical engineering.

show abstract

“…Many researchers are inspired by GPD and developed some novel particle numerical methods. [10][11][12][13][14] In the same time, the theoretical analysis of GPD on the traditional continuum level is under a rapid development, Yao et al 15 pointed out the deficiency of the kernel in GPD and modified the kernel approximation in his novel continuous smoothed-particle hydrodynamics (CSPH) theory. Zhou et al 16,17 extended the GPD theory in the micro-level with the combination of the peridynamics (PD) and proposed a novel smoothed PD (SPD).…”

Section: Introductionmentioning

confidence: 99%

“…The damage model in GPD utilizes a damage variable to collect the damaged particles and to simulate the solid fracture. Many researchers are inspired by GPD and developed some novel particle numerical methods 10–14 . In the same time, the theoretical analysis of GPD on the traditional continuum level is under a rapid development, Yao et al 15 pointed out the deficiency of the kernel in GPD and modified the kernel approximation in his novel continuous smoothed‐particle hydrodynamics (CSPH) theory.…”

Section: Introductionmentioning

confidence: 99%

Advanced general particle dynamics with nonlocal foundation for fracture analysis

Zhou

Yao

Berto

2022

Fatigue Fract Eng Mat Struct

View full text Add to dashboard Cite

The general particle dynamics (GPD), which is based on the kernel approximation method and Navier–Stokes equation, was developed from smoothed‐particle hydrodynamics to simulate the fracture behaviors by using the collective of damage variable to describe the damage evolution behaviors. In this paper, an advanced GPD with a nonlocal foundation is proposed for better description of the solid mechanics. The nonlocal vector calculus and microscopic constitutive model are employed to derive the governing equations in the proposed theory. The novel GPD with a nonlocal core is a generalization, which permits the inclusion of the microscopic constitutive model and the multi‐scale modeling compared with the previous GPD. To accomplish this generalization, the relationship between GPD and the previous kernel‐based theory is established. The novel GPD is superior in the fracture problems and multi‐scale modeling. Some numerical experiments are launched to verify the ability of the novel GPD.

show abstract

A comparative study on the crack development in rock-like specimens containing unfilled and filled flaws

Cited by 49 publications

References 76 publications

On the Fracture Evolution and Instability of Pyrite-Filled Marble Exposed to Freeze-Thaw-Compression Loads

On the Fracture Evolution and Instability of Pyrite-Filled Marble Exposed to Freeze-Thaw-Compression Loads

Application of 3D Printing Technology in the Mechanical Testing of Complex Structural Rock Masses

Advanced general particle dynamics with nonlocal foundation for fracture analysis

Contact Info

Product

Resources

About