scholarly journals Study on the Creep Constitutive Model of a Sandstone Rock under the Water-Rock Interaction

2021 ◽  
Vol 2021 ◽  
pp. 1-10
Author(s):  
Zuosen Luo ◽  
Zuoxiang Zhu ◽  
Jianlin Li ◽  
Lehua Wang ◽  
Qiao Jiang ◽  
...  
Keyword(s):  
Rock Mass ◽  
Constitutive Model ◽  
Nonlinear Creep ◽  
Rock Interaction ◽  
Long Term Stability ◽  
Sandstone Rock ◽  
Influence Of Water ◽  
Creep Constitutive Model ◽  
Water Rock Interaction

With the continuous construction of large-scale geotechnical engineering, more and more attention has been paid to the long-term stability of rock mass engineering, especially the problem of rock creep under the influence of water. Combined with the author’s previous research on the triaxial creep characteristics of sandstone under water-rock interaction, a nonlinear creep constitutive model was established to capture the degradation behavior of a sandstone rock due to cyclic wetting and drying of the reservoir water. Due to the limitations of the visco-elastoplastic model, a thorough modification was done to account the effect of the water-rock interaction on the mechanical degradation of the sandstone rock. Finally, the predicted results were proved to be in a good agreement with the experimental results. Moreover, the strong correlations between the predicted results and the experimental results show the effectiveness of the modified model to scrutinize the nonlinear creep behavior of sandstone rock. Relevant research results have important theoretical significance for the accurate prediction and effective control of the long-term stability of rock mass engineering under the influence of water-rock interaction.

scholarly journals Effect of the Water-Rock Interaction on the Creep Mechanical Properties of the Sandstone Rock

2018 ◽  
Author(s):  
Zuosen Luo ◽  
Jianlin Li ◽  
Qiao Jiang ◽  
Yinchai Zhang ◽  
Yisheng Huang ◽  
...  
Keyword(s):  
Water Level ◽  
Term Strength ◽  
Three Gorges ◽  
Reservoir Water ◽  
Reservoir Water Level ◽  
Rock Interaction ◽  
The Three Gorges ◽  
Sandstone Rock ◽  
Water Rock Interaction

After the commencement of the Three Gorges hydropower project, the reservoir water level has been fluctuating by 30 m (145–175 m) annually. The stability of the bank slope has been highlighted since the reservoir water level has been repeated. Apart from that, the long-term effect of the water-rock interaction on the rheological and mechanical properties of the rock was not studied sufficiently. Therefore, a typical sandstone rock was brought from the Three Gorges reservoir area, to meet the purpose of this study. Then, a series of water-rock interaction tests were conducted to simulate the fluctuations in the reservoir water level. Based upon the experimental results, the following points were pointed out: 1) for the first three successive water-rock interaction cycles, the long-term strength of the rock was dramatically reduced. In contrast, the rate of reduction on the long-term strength of the rock was getting a steady state after six successive water rock interactions.2) At the failure stress level, the rock specimens exhibited similar characteristics under different water-rock interaction cycles. 3) The densely compacted micro structures of the sandstone rock were transformed into loose and porous state.

Shear Rheological Properties of Sericite-Greisen Phyllite

2012 ◽  
Vol 616-618 ◽  
pp. 162-165 ◽  
Author(s):  
Guang Ming Ren ◽  
Xue Qin Duan ◽  
Xin Yuan Jia
Keyword(s):  
Mechanical Properties ◽  
Rock Mass ◽  
Constitutive Model ◽  
Laboratory Tests ◽  
Geological Structure ◽  
Aging Behavior ◽  
Shear Creep ◽  
Long Term Stability ◽  
Study Laboratory

Creep and aging behavior, the inherent mechanical properties of rocks, are important evidences for analysis of geological structure and prediction of long term stability of rock mass. In this study, laboratory tests are carried out to investigate the shear creep occurring along the schistosities of sericite-greisen phyllite, and a rheological constitutive model of phyllite is established subsequently. On this basis, a fitting analysis of the test data using Burgers model is made, thus providing a reference for rheological calculation of rock mass of this type

Identification of Nonlinear Rheological Parameters of Medium-Strength Marble Rock

2012 ◽  
Vol 629 ◽  
pp. 423-426
Author(s):  
Yong Li ◽  
Wei Shen Zhu ◽  
Shu Cai Li
Keyword(s):  
Constitutive Model ◽  
Least Square ◽  
Rheological Parameters ◽  
Constant Parameter ◽  
Term Stability ◽  
Long Term Stability ◽  
Underground Caverns ◽  
Medium Strength ◽  
Marble Rock

The rheological behavior of rocks has been more and more important to predict the long-term deformation of rock engineering. We select a typical medium-strength marble rock as a research object to study the long-term stability of large-scale underground caverns. Some dry and water-saturated rock specimens are used to perform the uniaxial compressive test and the uniaxial compressive creep test. Then a non-constant-parameter damage rheological constitutive model for this medium-strength marble rock is put forward based on the in-situ geological data and uniaxial compressive rheological test results. The least square method based on search mode is utilized to perform the identifications of the rheological parameters. According to the test curves, the related rheological parameters are obtained through inversion analysis on a basis of the non-constant-parameter damage rheological constitutive model, which can provide more accurate rheological parameters for long-term stability analysis of actual projects.

A New Creep Constitutive Model for Eutectic Solder Alloy

2002 ◽  
Vol 124 (2) ◽  
pp. 85-90 ◽  
Author(s):  
X. Q. Shi ◽  
Z. P. Wang ◽  
W. Zhou ◽  
H. L. J. Pang ◽  
Q. J. Yang
Keyword(s):  
Constitutive Model ◽  
Testing Temperature ◽  
Creep Model ◽  
Temperature Dependent ◽  
Creep Tests ◽  
Creep Flow ◽  
Reliability Of Solder Joints ◽  
Power Law Creep ◽  
Creep Constitutive Model

In this study, a large number of creep tests were carried out to study the effect of stress level and testing temperature on the creep behavior of 63 Sn/37Pb solder in a systematic manner. Based on the dislocation controlled creep mechanism and Gibbs’ free-energy theory, a new creep constitutive model was proposed. The model was found to describe accurately the creep flow of the solder and to be capable of explaining the issues of stress and temperature dependent stress exponent and activation energy in the Arrhenius power-law creep model. Furthermore, the model was employed to predict accurately the long-term reliability of solder joints in a PBGA assembly.

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