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Experimental study on the mechanical properties and deformation failure characteristics of sandstone under graded equal amplitude cyclic loading and unloading [PDF]

Scientific Reports
To investigate the effects of graded equal amplitude cyclic loading on rock deformation and failure, this study examines the influence of confining pressure and upper limit cyclic stress on the deformation parameters, stress–strain hysteresis curves, and
Zhiwei Ni, Jie Li, Ke Qin, Xiaogang Wu, Junxing Zhu, Shiming Zhou   +5 more
doaj   +2 more sources

Mechanical Behavior and Acoustic Emission Characteristics of Sandstone Under Different Cyclic Loading and Unloading Disturbance Rates

Energy Science & Engineering
The frequency of dynamic disasters is escalating in deep coal mining, with an increasing number of disasters induced by the combined static and dynamic loading.
Pengpeng Wang, Liu Bin, Chunwei Ling, Qingshan Ren, Baohui Xu, Xuyu Hu   +5 more
doaj   +2 more sources

Influence of Multistage Target Temperature and Cyclic Loading/Unloading on the Permeability of Polypropylene Fiber Concrete

Advances in Civil Engineering, 2022
Due to the combined effect of temperature and cyclic loading and unloading, the gas permeability of polypropylene fiber reinforced concrete structures changes during service.
Peishan Cen, Erjian Wei, Kunyun Tian
doaj   +2 more sources

The influence of cyclic loading-unloading rates on the uniaxial mechanical anisotropy of coal. [PDF]

Sci Rep
Abstract In this study, the influence of the loading-unloading rate on the uniaxial mechanical anisotropy of coal was investigated via uniaxial compress testaments, acoustic emission (AE) monitor and digital image correlation (DIC), and a series of coal specimens with five anisotropy angles.
Xu D, Song H, Zhao L, Tang G, Hu S, Duan C, Song Y.   +6 more
europepmc   +3 more sources

Study on cyclic loading and unloading characteristics of remolded saturated soft soil [PDF]

Vibroengineering Procedia, 2020
This paper described a continuous load one-dimensional K0 consolidation apparatus developed and improved, conducted an axial cyclic loading and unloading test of saturated soft clay. It can be known from the experimental comparison that during the unloading period, a stress strain curve of saturated soft clay is made hyperbolic.
Xiabing Yue, Yapeng Niu
openaire   +2 more sources

Cyclic Loading and Unloading of Weakly Consolidated Sandstone with Various Water Contents

Sustainability, 2023
Weakly cemented rocks have a loose structure, poor mechanical properties, and soften and disintegrate upon contact with water. Mining operations cause damage and ruptures to rocks under cyclic loading and unloading, leading to serious disasters. This study investigated the effects of cyclic loading and unloading on the mechanical properties of weakly ...
Yaxin Long, Lihui Sun, Zhenyu Cai, Zhixin Jiang, Zongze Wang, Qingfeng He, Zhong Bai   +6 more
openaire   +2 more sources

Damage and Deterioration Characteristics of Sandstone Under Multi-Stage Equal-Amplitude Intermittent Cyclic Loading and Unloading

Buildings
The surrounding rocks of roadways are typically subjected to cyclic loading–unloading stress states in underground engineering. In addition, cyclic loads are discontinuous under real working conditions, usually while loading rock mass in a cycle ...
Ning Jiang, Yangyang Zhang, Zhiyou Gao, Genwang Zhang, Quanlin Feng, Chao Gong   +5 more
doaj   +2 more sources

Study on Mechanical Properties and Damage Evolution of High-Porosity Concrete under Cyclic Loading and Unloading

Advances in Civil Engineering, 2021
Understanding the mechanical properties and energy response of high-porosity concrete under the cyclic loading and unloading is the foundation of road construction in sponge city.
Dong Zhang, Ai-hong Lu, Xia Wang, Yu Xia, Si-yu Gong, Lei Sun, Ran-fang Zuo, Yang Dong   +7 more
doaj   +2 more sources

Experimental Study on Coal Specimens Subjected to Uniaxial Cyclic Loading and Unloading

Applied Sciences, 2022
The paper represents a test investigation of the mechanical properties and acoustic emission (AE) characteristics of low-strength coal specimens subjected to cyclic loading and unloading. From the lab tests, the following conclusions can be obtained: (1) The axial strain is very well linear with the loading–unloading cycle number, and the ...
Mingtao Gao, Hongyu Yan, Huiqiang Duan, Si Xiong   +3 more
openaire   +3 more sources

Experimental Research on Anisotropy Characteristics of Shale under Triaxial Incremental Cyclic Loading and Unloading

Applied Sciences
Shale is a common rock type that is associated with underground engineering projects, and several important factors, such as bedding structure, confining pressure, and the loading and unloading path, significantly influence the anisotropy of shale ...
Yangbing Cao, Qiang Yan, Sui Zhang, Fuming Cai   +3 more
doaj   +2 more sources