A New Method for 3D Modeling of Joint Surface Degradation and Void Space Evolution Under Normal and Shear Loads

Gui, Yan; Xia, Caichu; Ding, Wenqi; Qian, Xin; Du, Shigui

doi:10.1007/s00603-017-1242-y

Cited by 31 publications

(4 citation statements)

References 23 publications

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“…However, several works have pointed out that shearing deformation of joint may induce a damage process (e.g., Refs. 85,[108][109][110][111][112][113][114][115], which reflects the joint surface degradation. In this context, a possible alternative to address this feature would consist in resorting to continuum damage mechanics concepts to simulate the damage process leading to degradation of joint properties under creep conditions.…”

Section: Discussionmentioning

confidence: 99%

Micromechanical approach to effective viscoelastic behavior of jointed rocks

Maghous

Aguiar

Rossi

2021

International Journal of Rock Mechanics and Mining Sciences

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Assessing the overall instantaneous behavior and strength properties of jointed materials have been the subject of important investigations in the last decades, including phenomenological or micromechanics-based contributions. However, less attention has been dedicated to delayed component of deformation in such media. This issue is addressed in this paper, which is devoted to the formulation of a micromechanical approach to effective viscoelastic properties of jointed rocks with consideration of constituents aging. At the scale of representative elementary volume (REV), the joints are modeled as planar interfaces whose behavior is described by means of generalized viscoelastic state equations under normal and shear loading conditions. Closed-form expressions for the homogenized creep tensor are derived from solving an appropriate viscoelastic concentration problem stated on the REV. The local strain and displacement jump fields are analyzed by extending the concept of strain concentration to relate the components of joint displacement jump to macroscopic strain. Main features of the theoretical overall creep behavior, such as the anisotropy associated with the privileged joint orientations, are highlighted through explicit formulations in some particular configurations of the jointed medium. Finally, the ability of the approach to accurately reproduce the creep behavior of jointed media is assessed by comparison with experimental data as well as with finite element solutions derived in the context of multilayered stratified composite modeling.

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Section: Discussionmentioning

confidence: 99%

Micromechanical approach to effective viscoelastic behavior of jointed rocks

Maghous

Aguiar

Rossi

2021

International Journal of Rock Mechanics and Mining Sciences

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“…The model by Barton et al (1985) works with a set of functions [where (2) is the basis] which offers a good relation between complexity/calculation time versus accuracy. Li et al (2018) and Gui et al (2017) are using sets of functions, too. Their approach allows considering more physical details of the shear process.…”

Section: State Of the Art: (Semi-) Analytical Solutionsmentioning

confidence: 99%

Simulation of direct shear tests using a forces on fracture surfaces (FFS) approach

2021

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The aim of this work is to provide a complete data set of direct shear tests and to propose a corresponding simulation approach. Tests have been conducted on crystalline rock samples applying constant normal load (CNL) and constant normal stiffness (CNS) boundary conditions. A physical consistent algorithm which explicitly calculates the forces acting on the fracture surface (FFS) has been developed. This FFS approach can explain the occurrence of surface degradation and shows the main shear characteristics. After all, shearing of rough rock joints remains a complex process and the differences between laboratory and simulation results are still significant in some cases. All data and input files are provided free for download and testing.

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“…Grasselli et al [ 24 , 25 , 26 ] proposed employing the maximum potential contact area ratio, maximum apparent angle, and roughness parameters to quantitatively describe the interface topography characteristics through high-precision three-dimensional scanning and sensing quantification method of interface topography. Gui et al [ 27 , 28 ] studied the shear mechanical behavior and the deterioration characteristics of interface topography in different shear displacements on the basis of three-dimensional topography-sensing technology. Although these have greatly enriched the understanding of shear mechanical properties of rock interfaces, most are concentrated on the single shear performance of the interface.…”

Section: Introductionmentioning

confidence: 99%

Apparent Deterioration Law and Shear Failure Mode of Rock–Mortar Interface Based on Topography-Sensing Technology

et al. 2023

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As an advanced spatial technology, topography-sensing technology is comprehensive, macroscopic, and intuitive. It shows unique advantages for rock structure interpretation and has important guiding significance for the research of the shear performances of rock–mortar interface under cyclic load in rock mass engineering. In this paper, cyclic shearing tests combined with the shear surface topography-sensing technology are employed to investigate the evolution characteristics of the interface morphology and the strength deterioration of the rock–mortar interface. Primarily, mortar and three types of rocks are used to prepare different rock–mortar interfaces, which are then applied to cyclic shear loading under two constant normal stresses. Subsequently, the shear strength degradation and dilatancy characteristics of rock–mortar interfaces with varying shear times are discussed. In addition, on the basis of the non-contact three-dimensional topography-sensing technology, the apparent three-dimensional point–cloud coordinate information of rock–mortar interface before and after each shear loading is obtained, and the apparent three-dimensional topography parameters of rock–mortar interface are calculated, according to which the influences of normal stress and lithology on the topography of interface subjected to cyclic shearing loading are analyzed.

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A New Method for 3D Modeling of Joint Surface Degradation and Void Space Evolution Under Normal and Shear Loads

Cited by 31 publications

References 23 publications

Micromechanical approach to effective viscoelastic behavior of jointed rocks

Micromechanical approach to effective viscoelastic behavior of jointed rocks

Simulation of direct shear tests using a forces on fracture surfaces (FFS) approach

Apparent Deterioration Law and Shear Failure Mode of Rock–Mortar Interface Based on Topography-Sensing Technology

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