Results 71 to 80 of about 2,122 (176)

High Temperature Friction and Strength of Felsite and Basalt: Implications for Supercritical EGS at Krafla, Iceland

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 5, May 2026.
Abstract One promising potential site for extracting supercritical geothermal fluids is the Krafla volcano, Iceland, into which a borehole was drilled very close to a shallow rhyolite magma chamber at about 2 km depth. Besides the technical challenge to drill in this setting, the extreme temperature conditions of T > 900°C close to the magma body may ...
E. Rybacki, V. Schuster, J. Starke, S. Incel   +3 more
wiley   +1 more source

Computational Investigation on the Combined Effect of Applied Strain and Pore Configuration on Strain Concentrators in Additively Manufactured Metals

Fatigue &Fracture of Engineering Materials &Structures, Volume 49, Issue 5, Page 1656-1679, May 2026.
ABSTRACT Metal additive manufacturing (AM) provides a pathway for creating highly optimized components that would be difficult to produce using traditional manufacturing methods. However, regardless of printing parameters or postprocessing, porosity remains a prevalent challenge in AM components because strain concentrates in the vicinity of the pore ...
Erick Adan Ramirez, Saikumar Reddy Yeratapally, George Robert Weber, Kenji Shimada   +3 more
wiley   +1 more source

Failure and deformation characteristics of shale subject to true triaxial stress loading and unloading under water retention and seepage. [PDF]

R Soc Open Sci, 2022
Li S, Wang C, Zhang D, Yu B, Ren K.
europepmc   +1 more source

Fractal Characteristics and Energy Evolution Analysis of Rocks under True Triaxial Unloading Conditions

Fractal and Fractional
To investigate the mechanical properties and energy evolution laws of rocks under true triaxial unloading conditions, a study was conducted using a true triaxial rock testing system on three different types of rocks: coal, sandy mudstone, and siltstone ...
Cheng Pan, Chongyan Liu, Guangming Zhao, Wei Yuan, Xiao Wang, Xiangrui Meng   +5 more
doaj   +1 more source

Mechanical and Coal Burst Breeding Mechanism of Coal Samples under True Triaxial Loading and Unloading

Advances in Civil Engineering, 2019
A true triaxial loading and unloading experiment entailing “y-direction stress loading, z-direction stress unloading, and x-direction displacement fixing” of coal samples was conducted.
Wei Shen, Lin-ming Dou, Hu He
doaj   +1 more source

Permeability evolution of fractured coal subject to confining stress and true triaxial stress loading: experiment and mathematical model

Frontiers in Earth Science
The accurate elucidation and prediction of coal permeability evolution under stress loading conditions are crucial for coalbed methane production. In this study, flow experiments were conducted on six cylindrical coal samples and four cubic coal samples ...
Xiaobo Huang, Xiaobo Huang, Yiyu Lu, Yiyu Lu, Binwei Xia, Binwei Xia, Yafei Luo, Yafei Luo   +7 more
doaj   +1 more source

Anisotropic characteristics and creep model for thin-layered rock under true triaxial compression

Journal of Rock Mechanics and Geotechnical Engineering
The failure phenomenon of thin-layered rock tunnels not only exhibits asymmetric spatial characteristics, but also significant time-dependent characteristics under high in-situ stress, which is attributed to the time-dependent fracture of thin-layered ...
Tianxiang Song, Xia-Ting Feng, Yangyi Zhou, Chengxiang Yang, Xiaojun Yu   +4 more
doaj   +1 more source

Evolution of mechanical parameters of Shuangjiangkou granite under different loading cycles and stress paths

Journal of Rock Mechanics and Geotechnical Engineering
Surrounding rocks at different locations are generally subjected to different stress paths during the process of deep hard rock excavation. In this study, to reveal the mechanical parameters of deep surrounding rock under different stress paths, a new ...
Liangjie Gu, Xia-Ting Feng, Rui Kong, Chengxiang Yang, Yuelin Xia   +4 more
doaj   +1 more source

Three-dimensional strength criterion for rocks: A review

Energy Reviews
Deep rocks are typically under a true-triaxial stress state. The strength of deep rock is thus dictated by both the direction and magnitude of principal stresses.
Jiacun Liu, Xing Li, Junjie Xiao, Yachen Xie, Kaiwen Xia   +4 more
doaj   +1 more source

A discrete approach for modelling the permeability evolution of granite under triaxial and true-triaxial stress conditions

IOP Conference Series: Earth and Environmental Science
Abstract In deep underground engineering, modelling the seepage characteristics of rock masses under complex stress conditions is crucial for the safe construction and stable operation of a project. The permeability of the rock mass is not only controlled by its internal pore structure but is also closely related to the deformation and ...
Chen He, Chi Yao, Yulong Shao, Qinghui Jiang, Chuangbing Zhou   +4 more
openaire   +1 more source