Fatigue properties of rock salt subjected to interval cyclic pressure

Fan, Jinghong; Chen, Jie; Jiang, Deyi; Ren, Shumei; Wu, Jicang

doi:10.1016/j.ijfatigue.2016.04.021

Cited by 98 publications

(34 citation statements)

References 26 publications

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“…ig. 9 Irreversible volumetric strain as a function of the axial strain nn at the end of a loading step for different orientations of the strata, uniaxial test, sandstone (Gatelier et al 2002) Fan et al (2016Fan et al ( , 2017 Size of the rock sample Increase number of cycles to failure Le et al (2014) For instance, a comparison on indirect tensile tests on Brisbane tuff is provided in Fig. 12.…”

Section: Crack Development and Measurementmentioning

confidence: 99%

Cyclic and Fatigue Behaviour of Rock Materials: Review, Interpretation and Research Perspectives

Cerfontaine¹,

Collin²

2017

Rock Mech Rock Eng

279

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Section: Crack Development and Measurementmentioning

confidence: 99%

Cyclic and Fatigue Behaviour of Rock Materials: Review, Interpretation and Research Perspectives

Cerfontaine¹,

Collin²

2017

Rock Mech Rock Eng

279

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“…e mechanical properties of rock samples under monotonic and cyclic loadings were also studied [7], it was found that under monotonic loading, thenardite and glauberite samples show an elastic-plastic style; however, under cyclic loading, it changed to a ductile style. ere have also been several studies on the fatigue properties of rock salt subjected to interval cyclic pressures [2,8,9]. In one of these studies, an empirical model fitting the relationship between fatigue life and interval cyclic pressure was established.…”

Section: Introductionmentioning

confidence: 99%

Effects of Cyclic Loading on the Mechanical Properties of Mature Bedding Shale

Guo

Yang

Wang

et al. 2018

Advances in Civil Engineering

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We investigated the mechanical properties of mature bedding shale under cyclic loading conditions, with an application to the design of hydraulic fracturing in shale gas wells. Laboratory experiments were conducted on shale samples under two principal loading orientations. Testing results showed that accumulated fatigue damage occurs in a three-stage process. Analysis of fatigue damage at different maximum stress levels shows that fatigue life increases as a power-law function with maximum stress decreasing. And the maximum stress significantly affects the fatigue life. Further, the elastic part of shale rock deformation was recovered in the unloading process, whereas the irreversible deformation remained. e irreversible deformation, growth trend, and accumulation of the total fatigue were directly related to the fatigue damage. is process can be divided into 3 stages: an initial damage stage, a constant velocity damage stage, and an accelerated damage stage, which accounted for about one-third of the fatigue damage. Shale rock is a nonhomogeneous material, and the bedding is well developed. Its fatigue life differs greatly in two principal loading orientations, even under the same loading conditions. All of these drawn conclusions are of great importance for design of hydraulic fracturing in shale gas wells.

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“…The patterns of cyclic loading in previous studies were mainly dominated by time‐dependent loads or displacement signal repeated patterns, which is opposed to continually monotonic increasing loading by force or displacement. Thus, the mechanical properties of rocks subjected to fatigue loading are different from those of rocks subjected to monotonic loading . Cycling freeze‐thaw (FT) is also a type of fatigue loading, but FT cycles involve complex weathering processes that depend on the variations of water and temperature within rock materials .…”

Section: Introductionmentioning

confidence: 99%

“…Thus, the mechanical properties of rocks subjected to fatigue loading are different from those of rocks subjected to monotonic loading. [2][3][4] Cycling freezethaw (FT) is also a type of fatigue loading, 5 but FT cycles involve complex weathering processes that depend on the variations of water and temperature within rock materials. 6,7 Moreover, the formation process of rock masses is complicated, resulting from numerous discontinuities in the form of joints, faults, fissures, cracks, and weak Nomenclature: 2-D, Two-dimensional; 3-D, Three-dimensional; AE, Acoustic emission; DSCM, Digital speckle correlation method; FT, Freeze-thaw; GPD, General particle dynamics; PD, Peridynamics; PMMA, Polymethyl methacrylate; RFPA, Rock failure process analysis; SEM, Scanning electron microscopy surfaces in the rock masses.…”

Section: Introductionmentioning

confidence: 99%

Experimental study on effects of freeze‐thaw fatigue damage on the cracking behaviors of sandstone containing two unparallel fissures

Zhou

Niu

Zhang

et al. 2019

Fatigue Fract Eng Mat Struct

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This paper investigates the effects of freeze‐thaw (FT) fatigue damage on the cracking behaviors of sandstone specimens containing two unparallel fissures under uniaxial compression. First, the effects of FT fatigue damage and fissure angle on the mechanical properties of sandstone specimens are analyzed. Second, the real‐time cracking process of sandstone specimens is captured by a high‐speed digital video camera system. Seven crack coalescence patterns are observed in this experiment. Local strong fatigue‐damaged zones, which are visualized as white zones, are observed in the specimens subjected to FT cycles during loading. Finally, scanning electron microscopy (SEM) observations show that the local strong fatigue‐damaged zones mainly consisted of microcracks and micropores induced by the FT fatigue damage. These experimental results are helpful for improving the understanding of the cracking process in cold‐region engineering.

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Fatigue properties of rock salt subjected to interval cyclic pressure

Cited by 98 publications

References 26 publications

Cyclic and Fatigue Behaviour of Rock Materials: Review, Interpretation and Research Perspectives

Cyclic and Fatigue Behaviour of Rock Materials: Review, Interpretation and Research Perspectives

Effects of Cyclic Loading on the Mechanical Properties of Mature Bedding Shale

Experimental study on effects of freeze‐thaw fatigue damage on the cracking behaviors of sandstone containing two unparallel fissures

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