Effect of strain rate on the mechanical properties of salt rock

Liang, Weiguo; Zhao, Yangsheng; Shuanhai, Xu; Dusseault, Maurice B.

doi:10.1016/j.ijrmms.2010.06.012

Cited by 92 publications

(27 citation statements)

References 12 publications

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“…As described above, almost all the tests were conducted on shale with a certain static loading rate, there are limited investigations addressing the strain rate-dependent mechanical behaviors of shale. In fact, there is a clear time effect on many non-shale rock materials, for example high A Strain Rate Dependent Constitutive Model for the Lower Silurian Longmaxi Formation Shale in the Fuling Gas Field of the Sichuan Basin,China strain rates can enhance the peak strength and elastic modulus of many non-shale rocks, such as sandstone, salt rock and asphalt concrete (Katsuki and Gutierrez, 2011;Liang et al, 2011;Gong and Zhao, 2014). But we do not know if it is the same for shale.…”

Section: Introductionmentioning

confidence: 99%

A Strain Rate Dependent Constitutive Model for the Lower Silurian Longmaxi Formation Shale in the Fuling Gas Field of the Sichuan Basin, China

Hou

Li²,

Zhang³

et al. 2019

Acta Geologica Sinica (Eng)

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Shale, as a kind of brittle rock, often exhibits different nonlinear stress-strain behavior, failure and timedependent behavior under different strain rates. To capture these features, this work conducted triaxial compression tests under axial strain rates ranging from 5×10 −6 s −1 to 1×10 −3 s −1 . The results show that both elastic modulus and peak strength have a positive correlation relationship with strain rates. These strain rate-dependent mechanical behaviors of shale are originated from damage growth, which is described by a damage parameter. When axial strain is the same, the damage parameter is positively correlated with strain rate. When strain rate is the same, with an increase of axial strain, the damage parameter decreases firstly from an initial value (about 0.1 to 0.2), soon reaches its minimum (about 0.1), and then increases to an asymptotic value of 0.8. Based on the experimental results, taking yield stress as the cut-off point and considering damage variable evolution, a new measure of micro-mechanical strength is proposed. Based on the Lemaitre's equivalent strain assumption and the new measure of micro-mechanical strength, a statistical strain-rate dependent damage constitutive model for shale that couples physically meaningful model parameters was established. Numerical back-calculations of these triaxial compression tests results demonstrate the ability of the model to reproduce the primary features of the strain rate dependent mechanical behavior of shale.

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Section: Introductionmentioning

confidence: 99%

A Strain Rate Dependent Constitutive Model for the Lower Silurian Longmaxi Formation Shale in the Fuling Gas Field of the Sichuan Basin, China

Hou

Li²,

Zhang³

et al. 2019

Acta Geologica Sinica (Eng)

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“…Li et al [3] examined the growth of microcracks at different loading rates. Liang et al [4], Liu et al [5], Zhou et al [6], Zhang et al [7], and Kodama et al [8] studied the effects of the strain rate on the mechanical properties of rock. Li et al [9][10][11] analyzed the effect of the loading rate on the nonlinear mechanical properties of coal and suggested an efficient method to evaluate the impact performance of coal.…”

Section: Introductionmentioning

confidence: 99%

Use of Acoustic Emission for the Detection of Brittle Rock Failure under Various Loading Rates

Shuang

Chen

et al. 2018

Advances in Civil Engineering

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Acoustic emission has a direct correspondence to the internal damage of a material. To determine the effects of the loading rate on the mechanical properties of rock, the initial damage was characterized using the acoustic emission technique when a uniaxial preloading was imposed on a cylindrical rock sample. On this basis, the uniaxial compression test was conducted on sandstone that contains initial damage induced under a range of loading rates. e effects of the initial damage and loading rate on the mechanical properties of rock were analyzed. e uniaxial preloading generated randomly distributed microcracks in the natural rock. e results showed that the acoustic emission and positioning technique can characterize accurately the damage and its position due to preloading. e development of microcracks was found to be strongly dependent on the loading rate. Moreover, the loading rate accelerated the degradation of the rock strength. e effects of the loading rate and initial damage on the mechanical properties of rock are a complicated coupled process. From the experimental test result, a constitutive equation was constructed based on the damage mechanics.

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“…The temperature range covered was room temperature to about 8 K. They showed the existence of a hysteresis in elastic properties with cooling versus warming and also the presence of an anomalous behavior which indicates that Berea sandstone is softening with decrease in temperature between 200 K and 60 K. [ Ulrich and Darling , ]. Liang et al discovered that salt rock strength is affected very little by strain rate and that there is a logarithmic relationship between deformation modulus and loading strain rate [ Liang et al, ]. Ten Cate and Shankland explored slow dynamics in Berea sandstone and found that it has a strong memory of strain history and hysteresis in resonant frequencies with changing strain amplitude [ Ten Cate and Shankland , ].…”

Section: Introductionmentioning

confidence: 99%

Resonant Ultrasound Spectroscopy studies of Berea sandstone at high temperature

et al. 2016

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Resonant Ultrasound Spectroscopy was used to determine the elastic moduli of Berea sandstone from room temperature to 478 K. Sandstone is a common component of oil reservoirs, and the temperature range was chosen to be representative of typical downhole conditions, down to about 8 km. In agreement with previous works, Berea sandstone was found to be relatively soft with a bulk modulus of approximately 6 GPa as compared to 37.5 GPa for α‐quartz at room temperature and pressure. It was found that Berea sandstone undergoes a ~17% softening in bulk modulus between room temperature and 385 K, followed by an abnormal behavior of similar stiffening between 385 K and 478 K.

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Effect of strain rate on the mechanical properties of salt rock

Cited by 92 publications

References 12 publications

A Strain Rate Dependent Constitutive Model for the Lower Silurian Longmaxi Formation Shale in the Fuling Gas Field of the Sichuan Basin, China

A Strain Rate Dependent Constitutive Model for the Lower Silurian Longmaxi Formation Shale in the Fuling Gas Field of the Sichuan Basin, China

Use of Acoustic Emission for the Detection of Brittle Rock Failure under Various Loading Rates

Resonant Ultrasound Spectroscopy studies of Berea sandstone at high temperature

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