Damage evolution of rock salt under cyclic loading in unixial tests

Liu, Jianfeng; Xie, Heping; Hou, Zhengmeng; Yang, Chunhe; Chen, Liang

doi:10.1007/s11440-013-0236-5

Cited by 119 publications

(41 citation statements)

References 10 publications

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“…erefore, damage mechanics is a powerful tool to study the occurrence, propagation, and coalescence processes of these mesoscopic aws and their e ect on rock mechanical behaviors. Damage mechanics consists of the study of initiation and propagation of internal microcracks and defects under di erent loading condition, which may lead to deterioration of the mechanical properties of the material and eventually to failure [14]. To describe the damage evolution process, the calculation of the damage variable is essential.…”

Section: Damage Evolution Of Shale Rock Under Cyclic Loadingmentioning

confidence: 99%

“…According to the previous studies [14][15][16], the constitutive energy of the rocks is represented by the area between the complete stress-strain curve and the strain axis, and the area of OA 1 A 1 ′ is surrounded by the rst loading curve, and the strain axis can be de ned as absorbed energy; the area of O ′ A 1 A 1 ′ which is surrounded by the rst unloading curve and the strain axis can be de ned as released energy. So, the area of OAO ′ which is surrounded by the rst loading curve, the rst unloading curve, and the strain axis can be de ned as the dissipated energy.…”

Section: Damage Evolution Of Shale Rock Under Cyclic Loadingmentioning

confidence: 99%

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Mechanical Behavior of Shale Rock under Uniaxial Cyclic Loading and Unloading Condition

Zhao

Liu

et al. 2018

Advances in Civil Engineering

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In order to investigate the mechanical behavior of shale rock under cyclic loading and unloading condition, two kinds of incremental cyclic loading tests were conducted. Based on the result of the short-term uniaxial incremental cyclic loading test, the permanent residual strain, modulus, and damage evolution were analyzed firstly. Results showed that the relationship between the residual strains and the cycle number can be expressed by an exponential function. e deformation modulus E 50 and elastic modulus E S first increased and then decreased with the peak stress under the loading condition, and both of them increased approximately linearly with the peak stress under the unloading condition. On the basis of the energy dissipation, the damage variables showed an exponential increasing with the strain at peak stress. e creep behavior of the shale rock was also analyzed. Results showed that there are obvious instantaneous strain, decay creep, and steady creep under each stress level and the specimen appears the accelerated creep stage under the 4th stress of 51.16 MPa. Based on the characteristics of the Burgers creep model, a viscoelastic-plastic creep model was proposed through viscoplastic mechanics, which agrees very well with the experimental results and can better describe the creep behavior of shale rock better than the Burgers creep model. Results can provide some mechanics reference evidence for shale gas development.

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Section: Damage Evolution Of Shale Rock Under Cyclic Loadingmentioning

confidence: 99%

Section: Damage Evolution Of Shale Rock Under Cyclic Loadingmentioning

confidence: 99%

Mechanical Behavior of Shale Rock under Uniaxial Cyclic Loading and Unloading Condition

Zhao

Liu

et al. 2018

Advances in Civil Engineering

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“…Therefore variations of air or water pressures induce a cyclic loading of rock walls. Experimental investigations of the fatigue behaviour of rock material are scarce and complex to carry out (Attewell & Farmer, 1973;Martin & Chandler, 1994;Gatelier et al, 2002;Royer-Carfagni & Salvatore, 2000;Erarslan & Williams, 2012;Liu & He, 2012;Wang et al, 2013;Liu et al, 2014;Ghamgosar & Erarslan, 2015). However it clearly appears that failure of the material may be reached upon cyclic loading for an amplitude significantly lower than the monotonic resistance.…”

Section: List Of Symbols αmentioning

confidence: 99%

“…Given the lifespan of the rock structure, the maximum number of cycles or the maximum amplitude that could be sustained must be assessed. Models able to reproduce evolution of rock strength with cyclic loading are very limited (Li et al, 2003;Xiao et al, 2009Xiao et al, , 2010Bastian et al, 2014;Liu et al, 2014). They mostly consist in predicting strength or strain evolution of triaxial or uniaxial laboratory tests for a given material with respect to the number of cycles.…”

Section: List Of Symbols αmentioning

confidence: 99%

Validation of a New Elastoplastic Constitutive Model Dedicated to the Cyclic Behaviour of Brittle Rock Materials

et al. 2017

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Old mines or caverns may be used as reservoirs for fuel/gas storage or in the context of large scale energy storage. In the first case, oil or gas is stored on annual basis. In the second case pressure due to water or compressed air varies on a daily basis or even faster. In both cases a cyclic loading on the cavern's/mine's walls must be considered for the design. The complexity of rockwork geometries or coupling with water flow requires finite element modelling and then a suitable constitutive law for the rock behaviour modelling. This paper presents and validates the formulation of a new constitutive law able to represent the inherently cyclic behaviour of rocks at low confinement. The main features of the behaviour evidenced by experiments in the literature depict a progressive degradation and strain of the material with the number of cycles. A constitutive law based on a boundary surface concept is developed. It represents the brittle failure of the material as well as its progressive degradation. Kinematic hardening of the yield surface allows the modelling of cycles. Isotropic softening on the cohesion variable leads to the progressive degradation of the rock strength. A limit surface is introduced and has a lower opening than the bounding surface. This surface describes the peak strength of the material and allows the modelling of a brittle behaviour. In addition a fatigue limit is introduced such that no cohesion degradation occurs if the stress state lies inside this surface. The model is validated against three different rock materials and types of experi-

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“…Rock salt behaviour under cyclic mechanical loading was investigated e.g. by Fuenkajorn & Phueakphum (2010), Liang et al (2012), Guo et al (2012) and Liu et al (2014) for uniaxial stress condition.…”

Section: Motivation and Backgroundmentioning

confidence: 99%

Probabilistic Analysis of a Rock Salt Cavern with Application to Energy Storage Systems

et al. 2016

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Damage evolution of rock salt under cyclic loading in unixial tests

Cited by 119 publications

References 10 publications

Mechanical Behavior of Shale Rock under Uniaxial Cyclic Loading and Unloading Condition

Mechanical Behavior of Shale Rock under Uniaxial Cyclic Loading and Unloading Condition

Validation of a New Elastoplastic Constitutive Model Dedicated to the Cyclic Behaviour of Brittle Rock Materials

Probabilistic Analysis of a Rock Salt Cavern with Application to Energy Storage Systems

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