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Article
Effects of Different Bedding Angles and Impact Angles on the Dynamic Tensile Properties of Thermal-Treated Shale After Cooling Treatment
Studying the influence of the shale bedding angle and the angle between the shale bedding and the loading direction on the rock-breaking characteristics is highly important for proposing scientific methods or ...
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Article
Dynamic Responses of an Underground Opening Subject to Impact Loadings in Blocky Rock
The stability of rock blocks near the underground opening may be influenced by the impact loadings caused by either natural hazards or man-made disasters. This paper addressed the dynamic response of the rock ...
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Article
Study on the Mechanism of Rock Damage Under Microwave and Laser Irradiation Through Multiscale and Multiphysics Numerical Modelling
High-energy microwaves and lasers are applied to assist mechanical rock breaking due to their advantages in rapid thermal damage to hard rocks. However, the quantitative evaluation of rock damage under microwa...
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Article
Open AccessAssessment of small strain modulus in soil using advanced computational models
Small-strain shear modulus ( \(G_0\) G 0 ...
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Article
Open AccessEffects of ice content on compression characteristics of frozen sandstone by in-situ NMR technology
In cold regions, the freezing of pore water in rock affects the mechanical behavior of the rock. This paper studied the ice content of frozen sandstone at different temperatures and its effects on the mechanic...
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Article
Microdefect Evaluation of Bainite–Ferrite X80 Pipeline Steel Based on Nonlinear Lamb Wave
Early damage in metal materials is primarily characterized by microdefects, such as microcracks and micropores. In this study, we developed a novel approach for quantitatively assessing the microdefect damage ...
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Article
Pore characteristic evolution and damage deterioration of granite subjected to the thermal and cooling treatments combined with the NMR method
Temperature disturbance could cause deterioration of rock mechanical parameters, and it is of great significance to establish the corresponding quantitative characterization method of rock damage to reveal the...
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Article
Evaluation of microstructure deterioration inside sandstone under three different freezing-thawing cycle treatments
This paper investigated the microstructure deterioration of sandstones under three commonly used freezing-thawing (F-T) cycle treatments and compared the thermal-induced damage caused by these F-T treatments. ...
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Article
Evaluation of the effects of three different cooling methods on the dynamic mechanical properties of thermal-treated sandstone
A systematic understanding of the physical and mechanical behavior of high-temperature rocks after different cooling methods can provide a theoretical basis for underground coal gasification and geothermal res...
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Article
Effects of cooling thermal shock on the P-wave velocity of granite and its microstructure analysis under immersion in water, half immersion in water, and near-water cooling conditions
This study investigated the effects of cooling thermal shock on the P-wave velocity of granite and analyzed its microstructure. First, specimens were heated to high temperatures (400, 500, 600, and 800 °C), an...
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Article
Real-Time Visual Analysis of the Microcracking Behavior of Thermally Damaged Granite Under Uniaxial Loading
In high-temperature rock engineering projects, rocks are subjected to external loads. Studying the cracking behavior of thermally damaged rock under uniaxial loading is of great significance to engineering. In...
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Article
Thermal cycling effects on the dynamic behavior of granite and microstructural observations
This study investigated the thermal cycling effects on the dynamic behavior of granite and described its microstructure. The specimens were subjected to various numbers of thermal cycles (0, 1, 3, 5, and 7 cyc...
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Article
A Split Three-Characteristics Method for Stress Wave Propagation Through a Rock Mass with Double-Scale Discontinuities
A split three-characteristics method was proposed that can be used to analyze the stress wave propagation through a rock mass with double-scale discontinuities (micro-defect (MD) and macro-joint (MJ)). The mec...
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Article
Effects of cyclic freezing and thawing on the mechanical behavior of dried and saturated sandstone
This paper presents an experimental investigation of the effects of cyclic freezing and thawing on dried and saturated sandstone cores. Both static and dynamic tests were performed to determine the static stre...
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Chapter and Conference Paper
Effect of Rolling Process on Microstructure and Magnetic Properties of 50W800 Electrical Steel
The effects of microstructure and texture on the magnetic properties of 50W800 non-oriented electrical steel produced by secondary and single cold rolling and annealing process were studied by Zeiss metallogra...
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Chapter and Conference Paper
Microstructure and Texture of Hot Rolled Plate and Finished Product in Fe–3%Si Common Grain-Oriented Silicon Steel
The microstructure and texture of hot rolled plate and finished product of Fe–3%Si common grain-oriented silicon steel were studied by means of optical microscope (OM) and X-ray diffraction (XRD). The results ...
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Article
Dynamic Study on Fracture Problems in Viscoelastic Sedimentary Rocks Using the Numerical Manifold Method
The viscoelastic deformation behavior of a sedimentary rock under different loading rates is numerically modeled and investigated by the numerical manifold method (NMM). By incorporating a modified 3-element v...
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Article
Quality control on crim** of large diameter welding pipe
Crim** is used in production of large diameter submerged-arc welding pipes. Many researches are focused on crim** in certain manufacturing mode of welding pipe. The application scopes of research achieveme...
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Article
Simulation of viscoelastic behavior of defected rock by using numerical manifold method
Numerical simulations of longitudinal wave propagation in a rock bar with microcracks are conducted by using the numerical manifold method which has great advantages in the simulation of discontinuities. First...
