Results 11 to 20 of about 777,304 (305)

Prediction method and distribution characteristics of in situ stress based on borehole deformation—A case study of coal measure stratum in Shizhuang block, Qinshui Basin

Frontiers in Earth Science, 2022
A geometric equation of borehole deformation under stress was deduced based on the basic theory of elasticity. Subsequently, we established the quantitative relationship between the in situ stress and geometrical parameters of borehole deformation ...
Xinxin Fang, Xinxin Fang, Hong Feng, Yunhong Wang, Tao Fan   +4 more
doaj   +1 more source

In situ observation of stress relaxation in epitaxial graphene [PDF]

, 2009
Upon cooling, branched line defects develop in epitaxial graphene grown at high temperature on Pt(111) and Ir(111). Using atomically resolved scanning tunneling microscopy we demonstrate that these defects are wrinkles in the graphene layer, i.e. stripes
, Alpha T N'Diaye, Antonio J Martínez-Galera, Bene Poelsema, Carsten Busse, Coraux J, Dirk Wall, Frank-J Meyer zu Heringdorf, Fujita D, Hattab H Meyer zu Heringdorf N'Diaye A T van Gastel R Coraux J Wall D Horn-von Hoegen M Poelsema B Busse C Michely T, Hichem Hattab, Jiang J-W, Johann Coraux, José M Gómez-Rodríguez, Loginova E, Michael Horn-von Hoegen, N'Diaye A T, N'Diaye A T, Raoul van Gastel, Sun G F, Thomas Michely   +20 more
core   +5 more sources

Characteristics of in situ stress and its influence on coal seam permeability in the Liupanshui Coalfield, Western Guizhou

Energy Science & Engineering, 2021
The current in situ stress regime is of great significance to the exploration and development of coalbed methane (CBM). In this study, the vertical stress (σV), maximum horizontal principal stress (σH), and minimum horizontal principal stress (σh) in the
Xiaojie Fang, Caifang Wu, Xiuming Jiang, Ningning Liu, Dan Zhou, Yiwen Ju   +5 more
doaj   +1 more source

Residual Stress Mechanisms in Aluminum Oxide Films Grown by MOCVD [PDF]

, 2009
Residual stresses in amorphous aluminium oxide films were investigated with in situ wafer curvature measurements. The films were deposited from aluminium tri-isopropoxide, on sapphire substrates.
Gleizes, Alain, Samélor, Diane, Sheldon, Brian W., Soni, Sumit K., Vahlas, Constantin   +4 more
core   +2 more sources

Unreliable determination of in situ stress orientation by cross multipole array acoustic logging in fractured shale reservoirs

Energy Science & Engineering, 2023
With the development of shale gas exploration in China, the use of conventional logging tools has been introduced, and cross multipole array acoustic logging tools have gradually been used to determine the stress orientation in shale.
Haimeng Yang, Jifeng Yu, Jingshou Liu, Caifu Hu, Binxin Zhang, Peng Chen   +5 more
doaj   +1 more source

Analysis of in-situ stress field characteristics and tectonic stability in the Motuo key area of the eastern Himalayan syntaxis

Dizhi lixue xuebao, 2023
In order to obtain the in-situ stress field characteristics and analyze tectonic stability in the Motuo key area of the eastern Himalayan syntaxis, the in-situ stress measurement of one in-situ stress hole and 11 test sections of the Xirang section of ...
ZHANG Bin, SUN Yao, MA Xiumin, PENG Hua, JIANG Jingjie, MAO Jiarui, ZHANG Wenhui, ZHAI Yudong   +7 more
doaj   +1 more source

Holographic in situ stress measurements [PDF]

Geophysical Journal International, 1986
A new instrument for measuring the in situ level of stress in boreholes has been developed. The instrument operates on the principle of locally relieving the stresses acting on a rock mass by drilling a small hole into the borehole surface and recording the resultant displacement field by holographic interferometry.
Bass, Jay D., Schmitt, Douglas, Ahrens, Thomas J.   +2 more
openaire   +2 more sources

Hyperosmotic stress:in situchromatin phase separation [PDF]

Nucleus, 2020
Dehydration of cells by acute hyperosmotic stress has profound effects upon cell structure and function. Interphase chromatin and mitotic chromosomes collapse ("congelation"). HL-60/S4 cells remain ~100% viable for, at least, 1 hour, exhibiting shrinkage to ~2/3 their original volume, when placed in 300mM sucrose in tissue culture medium.
Ada L. Olins, Travis J. Gould, Logan Boyd, Bettina Sarg, Donald E. Olins   +4 more
openaire   +3 more sources

Energy Generation and Attenuation of Blast-Induced Seismic Waves under In Situ Stress Conditions

Applied Sciences, 2022
During blasting in deep mining and excavation, the rock masses usually suffer from high in situ stress. The initial seismic energy generated in deep rock blasting and its attenuation with distance is first theoretically analyzed in this study.
Jianhua Yang, Jinshan Sun, Yongsheng Jia, Yingkang Yao   +3 more
doaj   +1 more source

Lattice strain measurements using synchrotron diffraction to calibrate a micromechanical modeling in a ferrite–cementite steel [PDF]

, 2013
In situ tensile tests were performed at room temperature on a ferrite–cementite steel specifically designed for this study. The evolution of the average stress in ferrite during loading was analyzed by X-ray diffraction.Lattice strain measurements were ...
BERBENNI, Stéphane, BERVEILLER, Sophie, BOUAZIZ, Olivier, OUAHAB, Razane, PESCI, Raphaël, TAUPIN, Vincent   +5 more
core   +6 more sources