Inverted S-shaped model for nonlinear fatigue damage of rock

Xiao, Ji; Ding, Dexin; Xu, Guan; Jiang, Fuliang

doi:10.1016/j.ijrmms.2008.11.002

Cited by 171 publications

(64 citation statements)

References 5 publications

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“…e cyclic loading results showed that the fatigue failure consisted of three stages: an initial stage of fatigue fracture (initiation phase I), a stable crack propagation (uniform velocity phase II), and an unstable crack propagation, resulting in a sudden breakdown (accelerated phase III). ese three steps have also been reported in previous studies [13,14]. e fatigue process is related to accumulative damage, which oftentimes leads to a progressive weakness of materials.…”

Section: Comparison Between Cyclic Loading and Uniaxialsupporting

confidence: 71%

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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Section: Comparison Between Cyclic Loading and Uniaxialsupporting

confidence: 71%

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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“…No degradation is observed in Haimson and Kim (1971), Royer-Carfagni and Salvatore (2000), Cattaneo and Labuz (2001), Xiao et al (2009Xiao et al ( , 2010, Fuenkajorn and Phueakphum (2010), Wang et al (2013Wang et al ( , 2015 and Ma et al (2013), as reported in Fig. 2.…”

Section: Stress-strain Curvesmentioning

confidence: 62%

“…Several studies point out that monotonic stress-strain curves act as a failure locus for cyclically loaded samples (Haimson and Kim 1971;Martin and Chandler 1994;Yamashita et al 1999;Zhang et al 2008;Xiao et al 2009;Guo et al 2012;Song et al 2013;Liu et al 2017). An example of such a phenomenon is reproduced in Fig.…”

Section: Stress-strain Curvesmentioning

confidence: 99%

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

Cerfontaine¹,

Collin²

2017

Rock Mech Rock Eng

295

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“…Based on experimental observation, an inverted-S damage model [16] capable of representing the whole fatigue damage process was proposed by authors. The purpose of this work is to find a relatively suitable damage variable to describe the fatigue damage of rock, validate the applicability of the inverted-S damage model experimentally and explore the influencing factors on the fatigue damage evolution of rock.…”

Section: Introductionmentioning

confidence: 99%