Results 11 to 20 of about 26,318 (151)

A nonlinear creep model for surrounding rocks of tunnels based on kinetic energy theorem

open access: yesJournal of Rock Mechanics and Geotechnical Engineering, 2023
The initiating condition for the accelerated creep of rocks has caused difficulty in analyzing the whole creep process. Moreover, the existing Nishihara model has evident shortcomings in describing the accelerated creep characteristics of the ...
Wenbo Liu   +4 more
doaj   +3 more sources

Process fundamentals and quality investigation in extrusion 3D printing of shear thinning materials: extrusion process based on Nishihara model

open access: yesThe International Journal of Advanced Manufacturing Technology, 2022
Abstract Due to the complexity of extrusion 3D printing objects and lack of universal parameters, there are few classified statistics or quantitative description for the "extrudability" of material with shear thinning properties. In order to systematically study the rheological properties of extrudable materials and establish a unified ...
Yonghao Luo   +7 more
openaire   +3 more sources

An extended Nishihara model for the description of three stages of sandstone creep [PDF]

open access: yesGeophysical Journal International, 2013
SUMMARY ManygentlydippingtranslationalrockslideshavetakenplaceinredJurassicstratainWanzhou which is located in the middle bank area of the Three Gorges Reservoir, China. In order to study the mechanism of these translational rock slides, conventional triaxial tests and creep tests on sandstone specimens from red Jurassic strata in Wanzhou are performed,
Qinghui Jiang   +3 more
openaire   +3 more sources

Creep Model and Experimental Verification of Sandstone under the Coupled Effect of Chemical Corrosion and Temperature

open access: yesApplied Sciences
The Nishihara creep model is an extremely effective method in the field of sandstone creep model research. However, the Nishihara creep model curve for sandstone under the marine environment (the coupled effect of chemical corrosion and temperature) does
Xia Xiu   +5 more
doaj   +3 more sources

Fractional creep model and experimental study of unsaturated silty clay in Fuyang

open access: yesFrontiers in Earth Science, 2023
Due to the long-term overdraft of groundwater in Fuyang, silty clay in this area has been in an unsaturated state for a long time, which caused ground subsidence and threatened the safety of engineering construction.
Daguo Wu   +5 more
doaj   +1 more source

Equivalent fatigue stress and non-linear constitutive model for fatigue of rock

open access: yesYantu gongcheng xuebao, 2021
The traditional damage model is insensitive to cycles of loading and unloading, and it is obviously inadequate for the characterization of fatigue deformation and failure of rock. Based on the creep and fatigue tests, the "homology" hypothesis of the two
TANG Xin 1, YU Jin 1, LIN Li-hua 2, GAO Hai-dong 3, LI Gang 3, LIN Zhi-chao 2
doaj   +1 more source

Research on Creep Model of Roadway Surrounding Rock Based on Variable Creep Parameters

open access: yesMeikuang Anquan, 2020
In order to study the creep behavior of surrounding rock of Huaying Coal Mine in Sichuan under different confining pressure characteristics, the triaxial creep test of sandstone was carried out by TAW-2000 test system.
LIU Changming, ZHANG Hong
doaj   +1 more source

Fractional Order Derivative Nishihara Model of Artificial Frozen Soil

open access: yesAdvances in Engineering Research, 2014
Strength and creep performance is the most important in the frozen soil mechanics, It is an important basic basis on engineering foundation construction in cold region and artificial freezing method in shaft sinking. However, the nature of the frozen soil creep is complex, as well as the restriction of objective conditions, it has not been fully ...
Ying XU   +3 more
openaire   +1 more source

Differentiation of human pluripotent stem cells to brain microvascular endothelial cell-like cells suitable to study immune cell interactions

open access: yesSTAR Protocols, 2021
Summary: We describe the extended endothelial cell culture method (EECM) for the differentiation of human pluripotent stem cells (hPSCs) into brain microvascular endothelial cell (BMEC)-like cells.
Hideaki Nishihara   +5 more
doaj   +1 more source

Deformation Prediction of Tunnel-Surrounding Rock Considering the Time Effect of the Viscosity Coefficient: A Case of an NATM-Excavated Tunnel

open access: yesFrontiers in Earth Science, 2022
Considering engineering problems such as complicated stress and the difficulty in controlling large deformation while a tunnel passes through a soft rock stratum, a theoretical prediction model of convergence deformation of tunnel-surrounding rock is ...
Da Hu   +5 more
doaj   +1 more source

Home - About - Disclaimer - Privacy