Results 1 to 10 of about 7,763 (148)

Study on the mechanical properties of unloading damaged sandstone under cyclic loading and unloading [PDF]

Scientific Reports, 2023
To reveal the mechanical properties of rocks under stress disturbance and unloading confining pressure, conventional triaxial compression tests, triaxial compression tests on unloading damaged sandstone, and cyclic loading and unloading tests on ...
Hengbin Zhang, Lehua Wang, Jianlin Li, Huafeng Deng, Xiaoliang Xu   +4 more
doaj   +4 more sources

Study on mechanical properties of sandstone damaged by blasting load under triaxial cyclic loading and unloading [PDF]

Scientific Reports
To investigate the changes in the strength and deformation of the blast load-damaged sandstone roof plate under cyclic loading and unloading conditions at different confining pressures, a triaxial loading device was used to carry out graded cyclic ...
Haibo Wang, Genshuo Zhu, Ziyi Lu, Qi Zong, Hao Wang   +4 more
doaj   +4 more sources

Mechanical Properties and Energy Dissipation of Sandstone under Cyclic Loading-Unloading [PDF]

Shock and Vibration, 2021
For the bearing rock in geotechnical engineering, it is frequently affected by external loads. This paper adopted different upper limits of stress to carry out cyclic loading-unloading on the sandstone specimens to make them in different damage degrees ...
Shoudong Xie, Chang Su, Ying Xu, Qianqian Wang, Jian Wang, Zixiang Xia   +5 more
doaj   +2 more sources

Study on the energy characteristics of rocks under cyclic loading and unloading. [PDF]

Sci Rep
Abstract The deep-buried rock masses influenced by prolonged geological processes have accumulated vast amounts of energy. This stored energy is released due to disturbances in the external environment, a series of geological disasters is triggered.
Niu S, Wu J, Zhao J.
europepmc   +4 more sources

Energy Action Mechanism of Reinforced Sandstone under Triaxial Cyclic Loading and Unloading. [PDF]

Materials (Basel), 2022
In underground engineering, reinforcement is a necessary means to ensure the stability of surrounding rock. Due to the stress redistribution caused by excavation disturbances, the reinforced rock mass is frequently subjected to loading and unloading, and its mechanical properties change accordingly. Based on the above engineering practice, using pasted
Zhang S, Li Y, Yang J, Song Y, Yang L, Guo J.   +5 more
europepmc   +3 more sources

Experimental Study of Energy Evolution at a Discontinuity in Rock under Cyclic Loading and Unloading. [PDF]

Materials (Basel), 2022
Energy is often dissipated and released in the process of rock deformation and failure. To study the energy evolution of rock discontinuities under cyclic loading and unloading, cement mortar was used as rock material and a CSS-1950 rock biaxial rheological testing machine was used to conduct graded cyclic loading and unloading tests on Barton’s ...
Zheng W, Gu L, Wang Z, Ma J, Li H, Zhou H.   +5 more
europepmc   +3 more sources

Mechanical behaviour of medium-grained sandstones exposed to differential cyclic loading with distinct loading and unloading rates

Journal of Rock Mechanics and Geotechnical Engineering, 2022
This work aims to investigate the mechanical behaviour of medium-grained sandstones under cyclic loading with different loading/unloading rates. This type of cyclic loading is called differential cyclic loading (DCL) and is considered for testing rock ...
Zhengyang Song, Heinz Konietzky, Yunfeng Wu, Kun Du, Xin Cai   +4 more
doaj   +3 more sources

Permeability of the Hydrated Shale under Cyclic Loading and Unloading Conditions [PDF]

Geofluids, 2020
The hydrated shales under cyclic loading and unloading conditions are common for the shale reservoir development; corresponding mechanical properties and permeability evolution are very significant and should be deeply researched.
Liu Xianshan, Li Man, Xu Ming, Kang Zhiyong   +3 more
doaj   +2 more sources

Mechanical and hydraulic properties of fault rocks under multi-stage cyclic loading and unloading

International Journal of Coal Science & Technology, 2023
The rock mass in fault zones is frequently subjected to cyclic loading and unloading during deep resource exploitation and tunnel excavation. Research on the mechanical and hydraulic characteristics of fault rock during the cyclic loading and unloading ...
Wentao Hou, Dan Ma, Qiang Li, Jixiong Zhang, Yong Liu, Chenyao Zhou   +5 more
doaj   +2 more sources

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