A micromechanical model of elastoplastic and damage behavior of a cohesive geomaterial

Guéry, Ariane Abou‐Chakra; Cormery, Fabrice; Shao, Jian‐Fu; Kondo, Djimédo

doi:10.1016/j.ijsolstr.2007.09.025

Cited by 113 publications

(17 citation statements)

References 28 publications

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“…A number of experimental studies showed different modes of initiation and propagation of microcracks in rock material. Two important basic micromechanical models in damage mechanics were proposed to account for the correlation between the deformation and failure of rock and the growth of microcracks (Guéry, Cormery, Shao, & Kondo, 2008;Kondo, Welemane, & Cormery, 2007).…”

Section: Introductionmentioning

confidence: 99%

Experimental studies on hydro-mechanical properties of metamorphic rock under hydraulic pressures

Liu

Wang

et al. 2015

European Journal of Environmental and Civil Engineering

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The research on the hydro-mechanical coupling of metamorphic rock is of great importance in rock engineering. The main purpose of this study was to investigate the hydro-mechanical properties of metamorphic rock based on the experimental data from triaxial compression tests. Metamorphic rock samples taken from an underground oil storage facility were tested under different hydraulic pressures using a rock servo-controlled triaxial rheology test system. The results indicated that hydraulic pressure had impact on the strength, deformation and permeability of the metamorphic rock. Based on the test results, the stress-strain behaviour and permeability evolution of the rock samples show three stages. The mechanical properties of the metamorphic rock are presented in detail for the three stages in the whole stressstrain process. The derived mechanical parameters are correlated to the division of the phases. The relationship between hydraulic pressure and axial strain, lateral strain, volumetric strain and permeability are analysed and discussed, especially the influence of hydraulic pressure on various parameters in the hydro-mechanical process. The influence of the hydraulic pressure on the failure mode of the rock under coupled conditions is described.

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Section: Introductionmentioning

confidence: 99%

Experimental studies on hydro-mechanical properties of metamorphic rock under hydraulic pressures

Liu

Wang

et al. 2015

European Journal of Environmental and Civil Engineering

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“…The homogenized mechanical behavior of RVE can be expressed by linear relationships between the stress and the strain at the macroscopic scale. In the case of the homogeneous strain imposed on the RVE boundary, using the relations (6), (8) and the behavior law (1), this behavior is written in the form:…”

Section: Homogenizationmentioning

confidence: 99%

Prediction of effective mechanical properties of composite materials using homogenization approach: Application to tungsten fiber reinforced bulk metallic glass matrix composite

Belhouideg¹

2018

European Mechanical Science

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In this paper, the homogenization approach was presented to predict the effective mechanical properties of heterogeneous materials such as composite materials. Indeed, the main idea of this approach is to characterize the effective mechanical properties from a microstructural description of the heterogeneous materials and the knowledge of the local behavior of constituents using the homogenization process. It is a very efficient tool which is intensively developed in the field of numerical simulation of heterogeneous materials. Different scheme established from the solution of Eshelby's inclusion problem are recalled such as Mori-Tanaka scheme, dilute scheme and Voigt and Reuss bounds. Homogenization approach was applied to estimate the effective mechanical properties of tungsten fiber reinforced bulk metallic glass matrix composite. Predicted values were confronted with those obtained by experimental approach from literature. These comparisons show good agreement between the predicted and experimental values. The maximum deviations remain lower than 10.5% using Voigt bound. A parametric study shows that the mechanical properties depend strongly on the shape of inclusions.

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“…On the other hand, the specimens used in macro-scale laboratory creep tests needed to meet strict size requirements: the typical cylindrical specimen size was Φ50 mm×100 mm (Mishra and Verrna, 2015) and the size of the smaller prismatic samples was 25 mm×25 mm×50 mm (Lu and Wang, 2017). Besides, centimetre-scale laboratory experiments regard rocks consisting of various constituents (Guery et al, 2008) as homogeneous bodies, where the underlying mechanism of large creep deformation of soft mudstone yet remains to be relatively insufficiently understood. Adopting a new technique to identify various mineralogical constituents and investigate their creep characteristics is very meaningful since the individual behaviour of each constituent dictates the overall behaviour of macro-scale mudstone.…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation on the nanoindentation viscoelastic constitutive model of quartz and kaolinite in mudstone

Sun

Li²,

Elgharib

et al. 2020

Preprint

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The creep behaviors in deep underground engineering structures, especially in soft rocks, have a remarkable impact on the long-term stability of the excavations, which finally leads to the high risk and failure of it. Accordingly, it is essential to recognize the time-dependent deformation through the investigation of this phenomenon. In this study, the creep behaviors of soft rocks have been widely examined to help understand the underlying mechanism of the extended time-dependent deformation. Due to the limited results about the time-dependent properties of the constituents of the rock that reveal their heterogeneity, the targeting nanoindentation technique (TNIT), was adopted to investigate the viscoelastic characteristics of kaolinite and quartz in a two-constituent mudstone sample. The TNIT consists of identifications of mineralogical ingredients in mudstone with nanoindentation experiments on each identified constituent. After conducting experiments, the unloading stages of the typical indentation curves were analyzed to calculate the hardness and elastic modulus of both elements in mudstone. Additionally, the 180 s load-holding stages with the peak load of 50 mN were transformed into the typical creep strain-time curves for fitting analysis by using the Kelvin model, the standard viscoelastic model, and the extended viscoelastic model. Fitting results show that the standard viscoelastic model not only can perfectly express the nanoindentation creep behaviors of both kaolinite and quartz but also can produce suitable constants used to measure their creep parameters. Furthermore, the creep parameters of kaolinite are much smaller than that of quartz, which causes the considerable time-dependent deformation of the soft mudstone. Eventually, the standard viscoelastic model was also verified on the quartz in a sandstone sample.

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A micromechanical model of elastoplastic and damage behavior of a cohesive geomaterial

Cited by 113 publications

References 28 publications

Experimental studies on hydro-mechanical properties of metamorphic rock under hydraulic pressures

Experimental studies on hydro-mechanical properties of metamorphic rock under hydraulic pressures

Prediction of effective mechanical properties of composite materials using homogenization approach: Application to tungsten fiber reinforced bulk metallic glass matrix composite

Experimental investigation on the nanoindentation viscoelastic constitutive model of quartz and kaolinite in mudstone

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