Article
Engineering, Geological
Yao Wang, Yida Zhang
Summary: Understanding and accurately modeling the creep behavior of rock salt is important for geological storage and resource extraction. Low-stress creep tests suggest that extrapolation from high-stress data can underestimate creep rate, and higher humidity accelerates salt creep. Our study provides insights into the effect of humidity on salt creep and proposes a modified creep law that incorporates humidity dependency.
ROCK MECHANICS AND ROCK ENGINEERING
(2023)
Article
Energy & Fuels
Renbo Gao, Fei Wu, Jie Chen, Chun Zhu, Qingchuan He
Summary: This paper investigates the long-term mechanical behavior of salt rock and summarizes the deformation characteristics under different confining pressures. Logarithmic strain is proposed as a more suitable method for describing the deformation of rock specimens. The accuracy of Hou's model is verified based on experimental results.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Multidisciplinary Sciences
Nazli Tunar Ozcan
Summary: Rock salt caverns are excellent hosts for storing oil, natural gas, radioactive and toxic wastes due to their low permeability and self-healing characteristics. In this study, the effects of temperature on the physical and geo-mechanical properties of Cankiri rock salt were investigated. The results show that the P-wave velocity and Brazilian tensile strength of the rock salt decrease with increasing temperatures, while the uniaxial compression strength increases. The ductility of the rock salt also increases with temperature, and the number of cracks and porosity in the rock samples increase significantly with higher temperatures.
Article
Engineering, Geological
Mahmoud Alneasan, Mahmoud Behnia, Abdel Kareem Alzo'ubi
Summary: This study investigated tensile fracturing in different rock types under static and quasi-static strain rates, finding that increasing strain rate leads to higher crack propagation speed while decreasing strain rate helps improve parameters associated with hydraulic fracturing. Width and tortuosity are also affected by strain rate.
INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES
(2022)
Article
Chemistry, Physical
Lidong Yin, Yin Zhang, Lianpeng Dai, Jiping Zhang, Jiajun Li, Chenchen Yang
Summary: This study investigated the impact of drilling on the dynamic properties of coal rock and found that boreholes significantly weakened the dynamic compressive strength and modulus of elasticity of coal specimens under high strain-rate loading. The number and spacing of boreholes were identified as important design parameters for weakening coal-rock material.
Article
Materials Science, Multidisciplinary
Junbao Wang, Qiang Zhang, Zhanping Song, Yuwei Zhang, Xinrong Liu
Summary: The study found that loading rate has a certain influence on the mechanical properties of salt rock, with smaller loading rates leading to a higher degree of fracture in salt rock.
INTERNATIONAL JOURNAL OF DAMAGE MECHANICS
(2021)
Article
Materials Science, Multidisciplinary
Jiejie Li, Jie Li, Yangheng Chen, Lehui Dai, Longting Chen
Summary: In this work, the tensile mechanical responses of nanoporous gold were investigated via molecular dynamics simulations, with a focus on the effects of strain rate and temperature. The results show that the mechanical properties are correlated with the applied strain rate and decrease linearly with increasing temperature. It was observed that a critical strain rate of 109s-1 exists, at which the strain-rate sensitivity and temperature sensitivity change significantly.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Engineering, Geological
Chengzhi Qi, Mingyang Wang, Zefan Wang, Xiaozhao Li
Summary: This paper studies the coupling effect of sample size and strain rate on the compressive strength of rock and proposes a unified theoretical model. In the quasi-static loading regime, the formula for the coupling effect of sample size and strain rate on rock strength is obtained. In the dynamic loading regime, the formula for the coupling effect of sample size and strain rate on rock compressive strength is determined.
ROCK MECHANICS AND ROCK ENGINEERING
(2023)
Article
Materials Science, Multidisciplinary
Yu Ren, Pengwan Chen, Zheng Li, Ziyue Zhang, Yanwei Lv, Chang Zhang
Summary: Refractory metal particles were used to reinforce a titanium matrix composite in this study. The resulting 20W(P)/Ti composite demonstrated excellent mechanical properties, attributed to multiple strengthening mechanisms and the suppression of adiabatic shear sensitivity.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Polymer Science
Riza Asmaa Saari, Muhammad Shahrulnizam Nasri, Takumitsu Kida, Masayuki Yamaguchi
Summary: The effects of magnesium salts on a PVA film vary depending on the anion species, leading to changes in the glass transition temperature, modulus, yield stress, and crystallinity of the film. These effects are attributed to strong ion-dipole interactions between the magnesium salts and PVA chains, with the strength of interaction dependent on the specific anion species in a certain order according to the Hofmeister series.
Article
Engineering, Mechanical
Junbao Wang, Qiang Zhang, Zhanping Song, Yuwei Zhang
Summary: The creep behavior of salt rock under long-period cyclic loading is affected by the maximum cycling stress and period. The creep process can be divided into different stages, and different trends are observed when damage occurs.
INTERNATIONAL JOURNAL OF FATIGUE
(2021)
Article
Construction & Building Technology
Zhihang Wang, Erlei Bai, He Huang, Biao Ren
Summary: The uniaxial and dynamic compression tests were conducted on C30, C50, and C80 concrete. The study analyzed the dynamic mechanical properties of concrete in terms of compressive strength, dynamic increase factor (DIF), peak strain, and peak toughness, considering the effects of strength grade and strain rate. The results showed that the strength grade and strain rate have significant influences on the dynamic properties of concrete, with varying sensitivities among different concrete grades. Additionally, a critical strain rate for the strain rate effect of DIF was identified.
STRUCTURAL CONCRETE
(2023)
Article
Materials Science, Multidisciplinary
Defeng Guo, Wenke Deng, Ping Song, Xiaolong Lv, Yindong Shi, Zhehao Qu, Guosheng Zhang
Summary: The effect of strain rate on the microstructure and mechanical properties of ZrTi alloy upon electroplastic rolling is investigated. A higher strain rate leads to a higher ductility in the as-rolled samples but a poorer ductility in the rolled and thermally treated samples while there are no obvious changes in strength in the two kinds of samples. The enhancement in ductility of the as-rolled samples is attributed to the increase of alpha '' and beta phases with the increase of strain rate. The decrease in ductility of the rolled and thermally treated sample with the increase of strain rate is attributed to the decrease of omega phase. The mechanisms responsible for these evolutions are discussed in detail.
ADVANCED ENGINEERING MATERIALS
(2022)
Article
Engineering, Geological
Abbas Maadikhah, Hamed Molladavoodi, Ali Mortazavi, Hadi Atapour
Summary: Due to its low permeability, porosity and rock salt healing, salt domes are considered suitable sites for the storage of hydrocarbons, natural gas, compressed air, and nuclear waste. One method to assess the damage degree in rock salt is measuring ultrasonic wave velocities. This study investigates the anisotropy and inhomogeneity of rock salt samples through measuring ultrasonic wave propagation velocities in three directions, and reevaluates the anisotropy degree after true triaxial compression tests. The findings indicate that deviatoric stresses cause anisotropy in rock salt samples.
ROCK MECHANICS AND ROCK ENGINEERING
(2023)
Article
Metallurgy & Metallurgical Engineering
Tong Shen, Cai-he Fan, Ze-yi Hu, Qin Wu, Yu-meng Ni, Yu-zhou Chen
Summary: The effects of different strain rates on the microstructure and mechanical properties of spray-formed Al-Cu-Mg alloys during large-strain rolling were investigated using various techniques. The results indicate that the strain rate has an impact on the grain boundaries, dynamic recrystallization, average grain size, dislocation density, and precipitates.
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
(2022)
