Results 41 to 50 of about 14,344 (210)

Fast Determination of Soil Behavior in the Capillary Zone Using Simple Laboratory Tests [PDF]

, 2012
INE/AUTC 13 ...
Li, Lin, Lytton, Robert L., Xhang, Xiong
core  

Evaluation of a permeability-porosity relationship in a low permeability creeping material using a single transient test [PDF]

, 2009
A method is presented for the evaluation of the permeability-porosity relationship in a low-permeability porous material using the results of a single transient test. This method accounts for both elastic and non-elastic deformations of the sample during
Ai, Berge, Berge, Bernabé, Bernabé, Bernabé, Bernabé, Berryman, Biot, Brace, Breysse, Brown, Coussy, David, Detournay, Escoffier, Ghabezloo, Ghabezloo, Ghabezloo, Ghabezloo, Grasley, Hart, Hart, Jean Sulem, Jérémie Saint-Marc, Meziani, Rice, Scherer, Scherer, Scherer, Scherer, Siavash Ghabezloo, Sulem, Taylor, Vardoulakis, Walder, Wang, Zhu, Zimmerman, Zimmerman   +39 more
core   +5 more sources

Probability prediction of true‐triaxial compressive strength of intact rocks based on the improved PSO‐RVM model

Deep Underground Science and Engineering, EarlyView.
In this work, we propose an improved particle swarm optimization (PSO) algorithm and develop an improved PSO‐relevance vector machine (RVM) model as a substitute for traditional true‐triaxial testing. The model's high prediction accuracy was validated through comparisons with two other machine learning methods and five three‐dimensional Hoek–Brown type
Qi Zhang, Maohui Wang, Ning Wang, Yixin Shen, Xuzhen He   +4 more
wiley   +1 more source

Influence of intermediate principal stress on mechanics and acoustic emission characteristics of coal rock

Meikuang Anquan, 2021
In order to study the safety problems caused by coal mine excavation, the self-developed ground acoustic process simulation test system was used to carry out true triaxial loading and unloading tests of coal rock under different intermediate principal ...
PENG Yanyan, DENG Haoxiang, FAN Xiao
doaj   +1 more source

Effect of confining pressure on fracture characteristics and mineralogical behavior of tight sandstone specimens after hydraulic fracturing

Deep Underground Science and Engineering, EarlyView.
Hydraulic fracturing in tight sandstone and fracture propagation characteristics using backscattered electron‐scanning electron microscope (BSE‐SEM) images. Abstract This study focuses on hydraulic fracturing experiments conducted under triaxial conditions on tight sandstone specimens from Shivpuri district, Madhya Pradesh, India.
Pankaj Rawat, Narendra Kumar Samadhiya
wiley   +1 more source

Strength and deformation properties of structural lightweight concrete under true tri-axial compression

Case Studies in Construction Materials, 2019
In this paper, the strength and deformation of structural all lightweight concrete (ALWC), structural semi-lightweight concrete (SLWC) and normal weight concrete (NWC) subjected to uniaxial, equibiaxial and truly tri-axial compression was experimentally ...
Huai-liang Wang, Xiao-hua Huang, Bao Xie
doaj   +1 more source

Stress concentrations around voids in three dimensions : The roots of failure [PDF]

, 2017
Funding This work forms part of a NERC New Investigator award for DH (NE/I001743/1), which is gratefully acknowledged. Acknowledgments The authors would like to acknowledge the reviewers, Elizabeth Ritz and Phillip Resor.
Bubeck, A., Davis, T., Healy, D., Walker, R.   +3 more
core   +1 more source

Failure characteristics and the energy criterion of rock with a through‐going joint under true‐triaxial unloading conditions: Insights from the DEM model

Deep Underground Science and Engineering, EarlyView.
The rock failure mode is significantly influenced by the contributing factors, such as the joint inclination, the initial confining pressure, and the unloading point. We found six typical rock failure modes after a large number of numerical tests. Abstract Excavation unloading damages rock masses, with preferential failure along geological defects in ...
Fei Liu, Changhui Liang, Sijia Liu, Yongjun Zhang, Luo Wang   +4 more
wiley   +1 more source

Theoretical solution for the relationship between strength parameters of direct shear test and triaxial test

Yantu gongcheng xuebao
This paper analyzes the variation law of the Mohr's stress circle for normally consolidated soils in direct shear tests and triaxial compression tests. By comparing and analyzing the stress paths during the shearing process of the two tests, it is found ...
CAI Jifeng 1, CAI Jian 1, HU Zhongxiong 2
doaj   +1 more source

Experimental artefacts in undrained triaxial testing [PDF]

, 2010
For evaluation of the undrained thermo-poro-elastic properties of saturated porous materials in conventional triaxial cells, it is important to take into account the effect of the dead volume of the drainage system.
Ghabezloo, Siavash, Sulem, Jean
core   +3 more sources