Visco‐Elastoplastic Constitutive Fatigue Model for Rocks

Liu, Jianhao; Pu, Shaoyun; Rao, Junying

doi:10.1155/2020/4292043

Cited by 4 publications

(2 citation statements)

References 44 publications

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“…With further research, scholars are not satisfied with only study the rock internal damage, began to build the constitutive model of rock under cyclic loading and unloading. Current research focuses on component model [17][18][19][20][21], damage fatigue constitutive model [22,23] and empirical model [24]. The constitutive model that reflects the fatigue deformation of rock is established by combining the elastic, viscous and plastic body.…”

Section: Introductionmentioning

confidence: 99%

Mechanical Properties of Gas Storage Sandstone under Uniaxial Cyclic Loading and Unloading Condition

Zhao

Wu²,

Jun³

et al. 2023

Period. Polytech. Civil Eng.

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In order to study the mechanical properties and damage evolution of the gas storage surrounding rock under the periodic injection-production process, the uniaxial cyclic loading and unloading tests of sandstone were carried out by TFD-2000 microcomputer servo-controlled rock triaxial testing machine. Results shown that the compressive strength of gas storage sandstone specimens were gradually decreases with increasing of the stress amplitude after 200 cycles. The stress-strain curve under uniaxial cyclic loading and unloading condition formed hysteresis loops, and the hysteresis loop presented sparse-dense-sparse when the stress amplitude was relative higher. The residual strains can be divided into three stages of decay deformation stage, stable deformation stage and accelerated deformation stage when the stress amplitude is 8~32 MPa, this phenomenon is very similar to the creep behavior of rocks. The energy evolution of sandstone under cyclic loading and unloading was analyzed and the damage evolution low of which was also discussed in detail, the damage variable defined by energy dissipative ratio accumulation can well reflect the damage development of sandstone under uniaxial cyclic loading and unloading. A nonlinear visco-plastic body was proposed by considering the accelerate stage of curves of the axial residual strains, and used the nonlinear visco-plastic body to replace the visco-plastic body of the traditional Nishihara model, a nonlinear viscoelastic-plastic model for cyclic loads was established and the applicability of the model is verified. The research results provide certain reference value for the construction and maintenance of gas storage.

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Section: Introductionmentioning

confidence: 99%

Mechanical Properties of Gas Storage Sandstone under Uniaxial Cyclic Loading and Unloading Condition

Zhao

Wu²,

Jun³

et al. 2023

Period. Polytech. Civil Eng.

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“…Many slopes became unstable and landslides happened in June 2003 when the reservoir level rose to 135 m [1]. After its completion in 2009, the reservoir water level fluctuates sporadically between 145 m and 175 m. In reservoir area more than 2000 landslides are reported that are strongly or partially affected by the water storage [2][3][4][5][6]. The survival of local residents and property is threatened by potential landslide instability.…”

Section: Introductionmentioning

confidence: 99%

Stability and Deformation Analysis of Landslide under Coupling Effect of Rainfall and Reservoir Drawdown

Shoaib

Yang

et al. 2021

Civ Eng J

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Landslides, a devastating hazard, continue to happen, affecting the lives of thousands of people each year. Fluctuation in the Reservoir Water Level (FRWL) is one of the leading features disturbing the slope stability in reservoir areas, drawdown is more crucial than the rise to the stability of landslide. Latest studies grounded on field investigation and monitoring data propose that landslides in reservoir areas are initiated not solely by one issue like precipitation or FRWL, however conjointly by their joint actions. Zhulinwan landslide in Chongqing, China, Three Gorges Reservoir (TGR) area was analyzed by field investigation and numerical modelling to evaluate the characteristics of the landslide. The changes in landslide stability and deformation under the effect of reservoir drawdown and rainfall is analyzed using GEOSLOPE Software. The seepage analysis is done using SEEP W Model, afterward deformation and stability analysis using SLOPE W and SIGMA W respectively. The analysis confirmed that the coupling effect of reservoir drawdown at 1.2 m/d and rainstorm of once in 50 years return period makes the landslide unstable. Moreover, deformation at the same condition is maximum 0.049 m. The findings may be used by local authorities to help make decisions about slope stabilization in the event of a confirmed significant rainfall event. Doi: 10.28991/cej-2021-03091713 Full Text: PDF

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Damage and Failure Characteristics and Constitutive Model of Copper-Bearing Skarns Disturbed by Hierarchical Dynamic Loading After Loading And Unloading

Chun

Cheng

et al. 2022

Rock Mech Rock Eng

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Visco‐Elastoplastic Constitutive Fatigue Model for Rocks

Cited by 4 publications

References 44 publications

Mechanical Properties of Gas Storage Sandstone under Uniaxial Cyclic Loading and Unloading Condition

Mechanical Properties of Gas Storage Sandstone under Uniaxial Cyclic Loading and Unloading Condition

Stability and Deformation Analysis of Landslide under Coupling Effect of Rainfall and Reservoir Drawdown

Damage and Failure Characteristics and Constitutive Model of Copper-Bearing Skarns Disturbed by Hierarchical Dynamic Loading After Loading And Unloading

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