Mechanical behavior of salt rock under uniaxial compression and creep tests

2018 ◽  
Vol 110 ◽  
pp. 19-27 ◽  
Author(s):  
Hadiseh Mansouri ◽  
Rassoul Ajalloeian
Keyword(s):  
Mechanical Behavior ◽  
Uniaxial Compression ◽  
Salt Rock ◽  
Creep Tests

Experimental Study on Creep Property of Similar Material for Jin Tan Salt Rock Gas Storage Medium

2012 ◽  
Vol 170-173 ◽  
pp. 772-776
Author(s):  
Kang Duan ◽  
Qiang Yong Zhang ◽  
Bing Cai ◽  
Xiao Bin Xu
Keyword(s):  
Uniaxial Compression ◽  
Rock Salt ◽  
Creep Property ◽  
Gas Storage ◽  
Salt Rock ◽  
Similar Material ◽  
Creep Tests ◽  
Deformation And Failure ◽  
Original Rock ◽  
Stress Dependent

Uniaxial compression creep tests have been performed on a kind of rock salt similar material and laminated salt rock similar material on the base of salt rock gas-storage in Jintan. The creep tests show that the rheological property of the similar material is basically the same with the original rock. Under the uniaxial compression, the deformation gradually approaches to be constant after the early short stage of creep attenuation. The similar material shows stress-dependent behavior obviously under different stress stage, the greater the load the higher the creep ratio and creep deformation. A creep constitutive equation which is suitable to rock salt is used to the similar material, and it fits with the obtained creep data very well. The results show that the similar material developed in this passage has the same creep property as the original salt rock,and this material can be used to simulated the deformation and failure of underground gas storage constructed in bedded salt deposits.

scholarly journals Mechanical behavior of Ti-6Al-4V lattice-walled tubes under uniaxial compression

2021 ◽  
Author(s):  
Gen-zhu Feng ◽  
Jing Wang ◽  
Xin-yuan Li ◽  
Li-jun Xiao ◽  
Wei-dong Song
Keyword(s):  
Mechanical Behavior ◽  
Uniaxial Compression

scholarly journals Creep damage behavior of red sandstone after high temperature

2021 ◽  
Author(s):  
Xiaokang Pan ◽  
Filippo Berto ◽  
Xiaoping Zhou
Keyword(s):  
High Temperature ◽  
Uniaxial Compression ◽  
Deformation Modulus ◽  
Creep Damage ◽  
Viscosity Coefficient ◽  
Creep Tests ◽  
Red Sandstone ◽  
Instantaneous Strain ◽  
Treated Sample ◽  
Instantaneous Deformation

This work discusses the results from tests conducted to investigate the uniaxial compression and creep behavior of red sandstone. The original untreated sample and the 800 ℃ treated sample have been selected to carry out the experiments. It has been found that high temperature has obvious influence on the mechanical properties of red sandstone. The relationship between creep strain and instantaneous strain, as well as instantaneous deformation modulus and creep viscosity coefficient have been analyzed. It has been found that high temperature reduces the ability of red sandstone to resist instantaneous deformation and creep deformation. Acoustic emission (AE) technology has been also used in the loading process of uniaxial compression and creep tests, providing a powerful means for damage evolution analysis of red sandstone.

Mechanical Behavior of 2D C/SiC Composites at Elevated Temperatures under Uniaxial Compression

2011 ◽  
Vol 462-463 ◽  
pp. 1-6 ◽  
Author(s):  
Tao Suo ◽  
Yu Long Li ◽  
Ming Shuang Liu
Keyword(s):  
Compressive Strength ◽  
High Temperature ◽  
Carbon Fiber ◽  
Mechanical Behavior ◽  
Uniaxial Compression ◽  
Room Temperature ◽  
Elevated Temperatures ◽  
Carbon Matrix ◽  
Structural Applications ◽  
Sic Composites

As Carbon-fiber-reinforced SiC-matrix (C/SiC) composites are widely used in high-temperature structural applications, its mechanical behavior at high temperature is important for the reliability of structures. In this paper, mechanical behavior of a kind of 2D C/SiC composite was investigated at temperatures ranging from room temperature (20C) to 600C under quasi-static and dynamic uniaxial compression. The results show the composite has excellent high temperature mechanical properties at the tested temperature range. Catastrophic brittle failure is not observed for the specimens tested at different strain rates. The compressive strength of the composite deceases only 10% at 600C if compared with that at room temperature. It is proposed that the decrease of compressive strength of the 2D C/SiC composite at high temperature is influenced mainly by release of thermal residual stresses in the reinforced carbon fiber and silicon carbon matrix and oxidation of the composite in high temperature atmosphere.

Mechanical Behavior of Aluminum Foam Under Uniaxial Compression

2006 ◽  
pp. 73-82
Author(s):  
B. Kriszt ◽  
B. Foroughi ◽  
A. Kottar ◽  
H.P. Degischer
Keyword(s):  
Mechanical Behavior ◽  
Uniaxial Compression ◽  
Aluminum Foam

A nonlinear creep damage model for salt rock

2018 ◽  
Vol 28 (5) ◽  
pp. 758-771 ◽  
Author(s):  
Fei Wu ◽  
Jie Chen ◽  
Quanle Zou
Keyword(s):  
Test Data ◽  
Damage Model ◽  
Creep Damage ◽  
Nonlinear Creep ◽  
Salt Rock ◽  
Creep Tests ◽  
Nonlinear Constitutive Equation ◽  
Damage Constitutive Model ◽  
Creep Damage Model ◽  
Actual Stress

In the creep tests, stress is no longer a constant and increases gradually under the influence of damage occurring during accelerating creep, which is a slow-loading process rather than a conventional creep. With the accumulation of the damage over time, the actual stress increases greatly. The increased actual stress not only generates loading strain but also causes the steady creep rate to rise. This coupling possibly explains why salt rock presents nonlinear accelerating characteristics at the accelerating creep stage. In this work, the constraint of the present creep concept was overcome by assuming that the acceleration creep phase is a coupling process of loading and creeping. Furthermore, we demonstrate that the total strain in this phase is equal to the sum of loading strain and creeping strain. A new nonlinear constitutive equation for creep was then derived, and the mechanisms underlying the nonlinear accelerating characteristics emerging at the stage of accelerating creep are further explained. A step-loading experiment on salt rock was performed for a period of six months. The characteristics of accelerating creep appeared in the last step of loading. This new nonlinear creep damage constitutive model was used to fit and analyze the test data. Obtained results show that this model fits well to these test data and also favorably represents the nonlinear characteristics of accelerating creep, thus supporting the model’s validity.

Understanding the Effects of Processing on the Mechanical Behavior of a SI3N4 Ceramic Through Microstructural Investigations

2001 ◽  
Author(s):  
Q. Wei ◽  
J. Sankar
Keyword(s):  
High Temperature ◽  
Mechanical Behavior ◽  
Triple Junctions ◽  
Sintering Aids ◽  
Si3n4 Ceramic ◽  
Creep Tests ◽  
Furnace Annealing ◽  
Conventional Furnace ◽  
Different Temperatures ◽  
Si3n4 Ceramics

Abstract The mechanical properties of silicon nitride (Si3N4) ceramics are determined by their microstructure, which in turn depends on processing routes adopted to fabricate the material. To obtain dense Si3N4, sintering aids are almost always added during the densification process. The sintering aids remain in the ceramics as amorphous residues which adversely affect the high temperature mechanical behavior of the material. In this paper, we have investigated the effects of processing on the mechanical behavior of a sintered Si3N4 ceramic through detailed microstructural observations. A commercial Si3N4 was annealed using conventional furnace annealing and microwave annealing at different temperatures. Creep tests were performed to compare the high temperature mechanical behavior of the as-sintered and annealed ceramics. It was found that microwave and furnace annealing heat-treatments improve the creep resistance of the ceramic through devitrification of the triple junctions phases.

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