Results 31 to 40 of about 253,269 (194)

Research on Rock Strength Test Based on Electro-Hydraulic Servo Point Load Instrument

Applied Sciences, 2022
A new electro-hydraulic servo point load instrument was designed to address the problem that the existing point load instrument cannot be loaded continuously and uniformly; different loading rates (using three loading rates: 0.1, 0.5, 1.0 kN/s) were ...
Xiaoxia Zhou, Lei Qiao, Faquan Wu, Zhaoyuan Wang, Yinhong Chen, Jie Wu   +5 more
doaj   +1 more source

Water saturation induced changer in the indirect (Brazilian) tensile strength and the failure mode of some igneous rock materials [PDF]

, 2020
The present study concentrates on water induced strength reduction and variation of the failure mode in indirect (Brazilian) tension tests of several igneous rock materials under three moisture cases of oven-dry, air-dry and fully saturated states.
Komurlu, Eren, Yasar, Serdar
core  

Application and prospects of 3D printing in physical experiments of rock mass mechanics and engineering: materials, methodologies and models

International Journal of Coal Science & Technology, 2023
The existence of joints or other kinds of discontinuities has a dramatic effect on the stability of rock excavations and engineering. As a result, a great challenge in rock mass mechanics testing is to prepare rock or rock-like samples with defects.
Qingjia Niu, Lishuai Jiang, Chunang Li, Yang Zhao, Qingbiao Wang, Anying Yuan   +5 more
doaj   +1 more source

Second law of thermodynamics and the failure of rock materials [PDF]

, 2001
The relation of nonequilibrium thermodynamics to some failure and fracture theories of rock mechanics is investigated. The basic concepts are given to connect failure to the properties of material equations describing the elastic properties.
Ván, Péter, Vásárhelyi, Balázs
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Quasi-static stationary-periodic model of percussive deep drilling [PDF]

, 2005
Copyright @ 2005 Patron EditoreIn the percussively deep drilling, the rock is modeled by an infinite elastic medium with a semi-infinite cylindrical bore-hole having a curvilinear bottom.
Mikhailov, SE, Namestnikova, IV
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Acoustic fluidization and the extraordinary mobility of sturzstroms [PDF]

, 2003
with only a comparatively small vertical drop in height. Their extraordinary mobility appears to be a consequence of sustained fluid-like behavior during motion, which persists even for driving stresses well below those normally associated with granular ...
Bagnold, Bagnold, Brune, Campbell, Campbell, Chuang, Dade, Dainty, Erismann, Fineburg, Frankel, Gaffney, Gareth S. Collins, Goguel, H. Jay Melosh, Heim, Howard, Hsü, Iverson, Jaeger, Kanamori, Lucchitta, Lucchitta, Malin, McEwen, McSaveney, Melosh, Melosh, Melosh, Melosh, Melosh, Reynolds, Richards, Rodger, Schenk, Shreve, Zik   +36 more
core   +1 more source

Heterogeneity Measures for Analyzing the Scale Effect and Anisotropy of Joint Roughness

Journal of Mathematics
Joint roughness of rock joints is one of the key factors influencing the mechanical properties of rock joints. The influence of joint roughness on the mechanical properties of rock mass is usually quantitatively characterized by joint roughness ...
Jibo Qin, Zhenhan Zhang, Jun Ye
doaj   +1 more source

Fracture of disordered solids in compression as a critical phenomenon: I. Statistical mechanics formalism [PDF]

, 2002
This is the first of a series of three articles that treats fracture localization as a critical phenomenon. This first article establishes a statistical mechanics based on ensemble averages when fluctuations through time play no role in defining the ...
A. A. Griffith, A. Hansen, A. Hansen, C. Shannon, D. Sornette, G. G. Batrouni, H. J. Herrmann, J. B. Rundle, J. V. Andersen, J. W. Rudnicki, L. de Arcangelis, L. de Arcangelis, L. Golubovič, M. Kloster, M. Sahimi, M. Sahimi, M. Sahimi, P. C. Hemmer, P. M. Duxbury, R. L. Blumberg Selinger, Renaud Toussaint, S. Arbabi, S. D. Zhang, S. R. Pride, S. Zapperi, S. Zapperi, Steven R. Pride, Y. Moreno, Y. Moreno, Z. G. Wang   +29 more
core   +5 more sources

State-of-the-art review on plant-based solutions for soil improvement

Biogeotechnics, 2023
Vegetation has been used as a means in geotechnical engineering for soil improvement and erosion control. This paper aims to present a state-of-the-art review and future prospective on soil improvement and reinforcement with plants, mainly from a ...
Shanshan Li, Ziteng Wang, Hans Henning Stutz   +2 more
doaj   +1 more source

PyFrac: A planar 3D hydraulic fracture simulator

, 2020
Fluid driven fractures propagate in the upper earth crust either naturally or in response to engineered fluid injections. The quantitative prediction of their evolution is critical in order to better understand their dynamics as well as to optimize their
Lecampion, Brice, Zia, Haseeb
core   +1 more source