Analysis of energy dissipation characteristics in granite under high confining pressure cyclic load

Yang, Dongjie; Hu, Jianhua; Ding, Xiaotian

doi:10.1016/j.aej.2020.06.004

Cited by 23 publications

(4 citation statements)

References 24 publications

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“…This viscoelasticity could be confirmed by the loading and unloading curves of each cycle taking different paths, which occur due to energy dissipation during deformation of the material [ 42 ], producing an hysteresis loop between loading and unloading curves. The area under the loading curve represents the total input energy of the cycle and the area under the unloading curve represents the elastic strain energy, while the area between the two curves accounts for the dissipated energy during the compression cycle [ 43 ]. In addition to this, gauze showed the highest stress at a strain of 70%, both for cycle 1 and for cycle 10, while MRC showed the lowest, meaning that gauze was the most difficult material to deform up to a strain of 70%, and MRC the easiest one, which could be due to the internal microstructure of each one.…”

Section: Resultsmentioning

confidence: 99%

Green hemostatic sponge-like scaffold composed of soy protein and chitin for the treatment of epistaxis

Jimenez-Martin

Heras

Etxabide

et al. 2022

Materials Today Bio

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Section: Resultsmentioning

confidence: 99%

Green hemostatic sponge-like scaffold composed of soy protein and chitin for the treatment of epistaxis

Jimenez-Martin

Heras

Etxabide

et al. 2022

Materials Today Bio

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“…In addition to the change in deformation behaviours, fatigue damage accumulation is also significant during cyclic loading. The fatigue indicators often considered the inclusion of residual axial deformation [ 23 , 31 ], residual volumetric deformation [ 15 ], elastic/secant modulus [ 32 , 33 ] and energy dissipation [ 34 ]. The reduction in the elastic modulus and the accumulation of residual deformation are external factors contributing to fatigue damage, while energy dissipation is an internal factor.…”

Section: Introductionmentioning

confidence: 99%

Deformation Behaviour and Damage Evolution of Carbonaceous Phyllite under Cyclic Triaxial Loading

Fu,

Hu,

Shi

et al. 2023

Materials

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Rocks present complex deformation behaviours and damage processes under triaxial cyclic loading—a subject not yet sufficiently researched. This paper performed triaxial multistage constant-amplitude cyclic loading experiments under different confining stresses on carbonaceous phyllite. The degradation process is analysed by investigating the variation of elastic modulus ES, Poisson’s ratio υ, irreversible strain εirr and energy. Moreover, the rock’s failure mode is explored from both macro and micro perspectives. The results showed that the increase in stress level caused the decrease of ES in a step-like form, and the constant-amplitude cyclic loading in each stress level caused a slow decrease of ES, while the υ increased with stress level and constant-amplitude cycles in a similar form. εirr accumulated rapidly at first and then slowly at each stress level; the stress level and irreversible axial strain are related by an exponential function. In terms of energy evolution analysis, the damage to rock can be represented by the cumulative damage energy, there were deceleration accumulations and stability accumulation stages of damage at all stress levels, and an acceleration accumulation stage occurred when the rock was close to failure. The failures of rock under cyclic loading are mainly shear failures, accompanied by grain crushing.

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“…In addition, more than 70% of the rainfall occurred from April to August according to the recorded data from 1951 to 2019 in Guilin [1]. Therefore, a rock mass is usually in a state of wetting and drying cycles, and the damage and deterioration of the rock mass caused by this cyclic change is often more serious than that of sustained immersion [11][12][13][14][15][16][17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation on Influence of Acidic Dry-Wet Cycles on Karst Limestone Deterioration and Damage

Zhang

Wang

et al. 2022

Geofluids

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This study is aimed at the problem of limestone deterioration and damage caused by the combination of acid rain and the dry-wet cycle in Guilin. Samples of limestone were taken to study the influence of acidic dry-wet cycles on limestone deterioration and damage. This was accomplished by performing nuclear magnetic resonance (NMR) measurements and inductively coupled plasma atomic emission spectrometer measurements on the limestone samples. The study found that with an increase in the number of cycles, the T 2 curve of the rock continuously shifts to the right, but the range of movement still decreases with pH increasing values. The T 2 spectrum area, rock porosity, porosity deterioration, mass loss rate, and water absorption rate all increase with an increase in the number of cycles, but the growth rate continues to decrease, and the increase is negatively correlated with pH. After the dry-wet cycles, the mass concentration of each element in the beaker is Ca, Mg, and Fe in order from high to low, and the mass concentration of each main element in the reaction solution increases with the increase in the number of acidic dry-wet cycles.

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Analysis of energy dissipation characteristics in granite under high confining pressure cyclic load

Cited by 23 publications

References 24 publications

Green hemostatic sponge-like scaffold composed of soy protein and chitin for the treatment of epistaxis

Green hemostatic sponge-like scaffold composed of soy protein and chitin for the treatment of epistaxis

Deformation Behaviour and Damage Evolution of Carbonaceous Phyllite under Cyclic Triaxial Loading

Experimental Investigation on Influence of Acidic Dry-Wet Cycles on Karst Limestone Deterioration and Damage

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