Study on Mechanical Properties and Energy Consumption of Fissured Sandstone with Different Dip Angles under Impact Load by Qi Ping, Shuo Wang, Yulin Wu, Shijia Sun, Kaifan Shen, Chen Wang, Qi Gao, Chenglong Fang

“…To study the dynamic mechanical properties and energy consumption of fissured sandstone with different dip angles under impact load, impact compression tests were conducted on seven groups of and intact and fractured sandstone specimens with different dip angles using the split Hopkinson pressure bar (SHPB) device with 0.3 MPa air pressure. …”
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Experimental Study on the Property Degradation and Failure Mechanism of Weakly Cemented Sandstone under Dry-Wet Cycles by Zhaoyang Song, Lihui Sun, Shouye Cheng, Zhiqiang Liu, Jie Tan, Fangbo Ning

“…Taking the weakly cemented sandstone of Ordos, China, as the research object, the evolution law between the relative stress of weakly cemented sandstone and the multiparameters of the acoustic emission under different dry-wet cycles was explored, and the critical failure identification mode of weakly cemented sandstone under dry-wet cycle was established. …”
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Damage Evolution of Sandstone under Constant-Amplitude Cyclic Loading Based on Acoustic Emission Parameters and Resistivity by Kui Wang, Zhengting Xia, Zhen Huang, Xue Li

“…Therefore, in this paper, the AE characteristics and resistivity properties of sandstone subjected to constant-amplitude cyclic loading and unloading were experimentally investigated using a typical sandstone in Chongqing. …”
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Research on the Pore Evolution of Sandstone in Cold Regions under Freeze-Thaw Weathering Cycles Based on NMR by Zheng Pan, Keping Zhou, Rugao Gao, Zhen Jiang, Chun Yang, Feng Gao

“…To study the mesoscopic evolution law of the rock pore structure under freeze-thaw weathering cycles, a freeze-thaw weathering cycle experiment was performed on red sandstone from the cold region of western China with temperatures ranging from -20°C to +20°C. …”
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Experimental and simulation study on tensile mechanical characteristics and crack development law of sandstone after thermal treatment by Jing Yang, Sheng-Qi Yang, Guang-Jian Liu, Bo-Wen Sun, Wen-Ling Tian, Jin-Zhou Tang

“…For further explore the tensile mechanical properties and crack development law of rock after thermal treatment, Brazilian splitting test and Three-Dimensional Particle Flow Code (PFC3D) numerical simulation of sandstone after thermal treatment at 25 °C–900 °C were carried out. …”
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Experimental Study on Influencing Factors of CO2 Huff and the Puff Effect in Tight Sandstone Oil Reservoirs by Jinsheng Zhao, Mingyong Xu, Yang Xu, Qingzhu Zhang, Changjing Zhou, Bin Li

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The Seepage-Destruction Mechanism of Water Inrush Channel of Sandstone Fault Filling Using the EDEM-Fluent Method by Wenya Cai, Yan Wang, Fujun He, Pengyuan Zhang, Shuo Sun

“…By the EDEM-Fluent coupling calculation method, the formation mechanism of the seepage failure water inrush channel and the migration of particles in the sandstone fault filling body are studied. Under the condition of variable hydraulic gradient, the whole seepage process can be divided into three stages: slow seepage stage, sudden seepage stage, and stable seepage stage. …”
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Study on Long-Term Dynamic Mechanical Properties and Degradation Law of Sandstone under Freeze-Thaw Cycle by Qingsong Pu, Junhong Huang, Fuling Zeng, Yi Luo, Xinping Li, Jixue Zhou, Shilong Zheng

“…Thus, the damage process of sandstone under freeze-thaw cycle and impact load is studied. …”
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Experimental Study of the Dynamic Mechanical Behavior and Degradation Mechanism of Red Sandstone in Acid Dry-Wet Cycles by Wu Sun, Bin Du, Qiangqiang Cheng

“…In this paper, the slit Hopkinson pressure bar (SHPB) experiments were conducted to investigate the dynamic mechanical characteristics of red sandstone during acid dry-wet cycles. The appearance of the samples was evaluated using scanning electron microscopy, and the process of red sandstone degradation under acid dry-wet cycles was examined. …”
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['EXPERIMENTAL INVESTIGATION OF DURABILITY AND STRENGTH OF SANDSTONE AND SHALE OF UNITED MINERAL COAL COMPANY SOR-RANGE, BALOCHISTAN'] by Tufail Ahmed, Syed Hafeez Ur Rehman, Fahim Ahmed Ibupoto, Asif Abbas, Sami Ullah, Abbas Hussain, Shehzad Usman

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The Fractal Dimension, Structure Characteristics, and Damage Effects of Multi-Scale Cracks on Sandstone Under Triaxial Compression by Pengjin Yang, Shengjun Miao, Kesheng Li, Xiangfan Shang, Pengliang Li, Meifeng Cai

“…The quantitative classification criteria for multi-scale cracks on sandstone were established, and the constraint effect of confining pressure was analyzed. …”
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Experimental Investigation of Unloading-Induced Red Sandstone Failure: Insight into Spalling Mechanism and Strength-Weakening Effect by Yong Luo, Fengqiang Gong, Dongqiao Liu

“…To study the effect of excavation unloading on hard rock failure, a series of true-triaxial compression tests, biaxial compression tests, and true-triaxial unloading compression tests (two different unloading rates) at different confining pressures was conducted on red sandstone cube samples. The strength and failure characteristics and their relationship for red sandstone unloading at different unloading rates and confining pressures were analyzed. …”
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Investigation of Sandstone Mesostructure Damage Caused by Freeze-Thaw Cycles via CT Image Enhancement Technology by Hui Liu, Gengshe Yang, Yehui Yun, Jianghao Lin, Wanjun Ye, Huimei Zhang, Yao Zhang

“…In this regard, this paper proposes a quantitative evaluation method based on computed tomography (CT) scanning technology for investigating the mesostructure and damage characteristics of sandstone subjected to freeze-thaw conditions. CT scan images of two sandstones with different grain sizes were obtained after 0, 20, 40, 60, 80, and 100 freeze-thaw cycles, using a high-precision CT scanner. …”
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Freeze-Thaw Cycle Effect on Sputtering Rate of Water-Saturated Yellow Sandstone under Impact Loading by Yunbing Hu, Tianzhu Duan, Penghui Xian, Liang Chen

“…In order to explore the impact of freeze-thaw temperature on the sputtering rate of water-saturated yellow sandstone under impact loading, in this paper, the Hopkinson pressure bar is used to conduct impact loading test on the water-saturated yellow sandstone at the same strain rate (74.22 s−1) under five different freeze-thaw temperatures. …”
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A Damage Constitutive Model of Red Sandstone under Coupling of Wet-Dry Cycles and Impact Load by Bin Du, Haibo Bai

“…Consequently, the validity of the model was verified by a series of dynamic compression tests of red sandstone. Results indicated that the proposed damage constitutive model can definitely describe the dynamic stress-strain curves of red sandstone after wet-dry cycles and impact load. …”
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Experimental Investigation on Strength and Deformation Characteristics of Red Sandstone at Strain Rates of 10−2∼55 s−1 by Jie Shi, Zongmu Luo, Huachao Liu, Dan Wang, Haipeng Shen, Zeng Li

“…Furthermore, both the brittleness and fracture degree of sandstone become more remarkable with the strain rate increasing.…”
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Constant Strain Rate Uniaxial Compression of Green Sandstone during SHPB Tests Driven by Pendulum Hammer by S. H. Li, W. C. Zhu, L. L. Niu, F. Dai

“…The use of different diameter hammers was noted for shaping stress-time curves to follow the stress-strain behavior of green sandstone. Finally, to examine the applicability of using hammer geometry for shaping incident waves to achieve constant strain rate, SHPB tests on green sandstone specimens were conducted. …”
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Obligaciones legales de las empresas. Su importancia en el campo de la Administración by Laura Angelina Obando Uzcátegui

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ECONOMIC SANCTIONS: THE ENTITY TYPES AND THEIR IMPACT ON THE FINANCIAL SUSTAINABILITY OF RUSSIAN ENTERPRISES by L. Milutina

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PRINCIPLES OF APPLICATION OF FINANCIAL ADMINISTRATIVE SANCTIONS IN THE LEGAL DOCTRINE OF UKRAINE AND THE WORLD by Ivan Shumeiko, Iryna Svitlyshyna, Olga Sokolenko

Subjects: “…administrative sanction…”
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