Results 21 to 30 of about 5,354,092 (327)

An Analytical Model for Fracture Initiation from a Particular Radial Borehole in Hydraulic Fracturing Guided by Multiradial Boreholes

Geofluids, 2021
Radial drilling-fracturing, the combination of the hydraulic fracturing and radial borehole, is a technology that can guide the hydraulic fractures to directionally propagate and efficiently develop low permeability reservoir.
Yuxin Chen, Yunhong Ding, Chong Liang, Dawei Zhu, Yu Bai, Chunmei Zou   +5 more
doaj   +1 more source

Observation of Microscopic Deformation Behavior of Cork [PDF]

, 2003
Cork is a material that has many characteristics, for instance, light weight, elasticity, insulation against heat, impermeability for liquid, and so forth. There are two types of cork, the natural and the agglomerated corks.
Abe, Takeji, Sato, Takashi
core   +1 more source

Bone resorption triggered by high radial stress: The mechanism of screw loosening in plate fixation of long bone fractures

Journal of Orthopaedic Research, 2019
Screw loosening is a common complication in plate fixation. However, the underlying mechanism is unclear. This study investigated screw loosening mechanisms by finite element analysis (FEA) simulation and clinical X‐ray feature analysis.
Xiaoreng Feng, G. Lin, C. Fang, W. Lu, Bin Chen, F. Leung   +5 more
semanticscholar   +1 more source

Integrity Analysis of Cement Sheath in Annulus B of Vertical Section during Hydraulic Fracturing

Shiyou jixie, 2022
In the process of shale gas development in China,the phenomenon of sustained casing pressure(SCP)is widespread,which seriously affects the wellhead safety and life cycle of shale gas wells.Taking a shale gas well as an example,combined with the rock ...
Zeng Bo, Wang Dong, Song Yi, Lian Wei, Li Jun   +4 more
doaj  

Radial Growth of Qilian Juniper on the Northeast Tibetan Plateau and Potential Climate Associations [PDF]

, 2013
There is controversy regarding the limiting climatic factor for tree radial growth at the alpine treeline on the northeastern Tibetan Plateau. In this study, we collected 594 increment cores from 331 trees, grouped within four altitude belts spanning the
A Dai, B Yang, B Yang, B Yang, Bao Yang, BE Splechtna, C Qin, C Qin, Chun Qin, ER Cook, ER Cook, ER Cook, EY Liang, EY Liang, F Babst, F Biondi, F Biondi, F Biondi, HC Fritts, HF Zhu, J Esper, J Esper, J Esper, JF Peng, Keith R. Briffa, KY Fang, M Carrer, M Carrer, MH He, MK Hughes, MS Morales, MW Salzer, Paulo Cavalcanti Gomes Ferreira, SY Kang, SY Kang, T Wang, Thomas M. Melvin, VC LaMarche, VC LaMarche, X Shao, XH Gou, Yan Zhao, YH Zheng, YX Zhang, YX Zhang, Zexin Fan, ZS Li   +46 more
core   +2 more sources

A fabrication history based strain-fatigue model for prediction of crack initiation in a radial loading wheel [PDF]

, 2017
A strain-based fatigue model concerning fabrication history is applied to predict the fatigue life of a commercial car wheel under radial loads. As the prior conditions, the strain fatigue testing is performed on standard specimen of DP590 and FB540 ...
Gu, H.R, Ling, Y.C, Liu, Y.G., Ma, M.T., Qin, R., Wan, X.M, Wang, G.Y, Zhao, Y.   +7 more
core   +1 more source

Study on the Variation Mechanism of Skin-friction Force on Surface Conductor in Offshore Drilling

Shiyou jixie, 2022
Skin-friction force plays a vital role in the bearing capacity of surface conductor and wellhead stability in offshore drilling, but the variation mechanism of skin-friction force during and after the jetting of surface conductor is not clear. Therefore,
Hu Nanding, Yang Jin, Yu Chen, Bao Suduna, Zhou Jianyi, Wang Jiakang, Ding Yida   +6 more
doaj  

Study on Dynamic Characteristics of Circular Tunnel Lining in Fractional Derivative Viscoelastic Radially Inhomogeneous Soil

Advances in Civil Engineering, 2022
Considering the heterogeneous and viscoelastic characteristics of the soil around the tunnel, the dynamic characteristics of circular tunnel lining in fractional derivative viscoelastic radially inhomogeneous soil are studied.
Zongling Zhang, Ru Li, Qifang Yan, Linchao Liu   +3 more
doaj   +1 more source

Stresses and deformations of an eccentric cylindrical cam during hydro-joining [PDF]

MATEC Web of Conferences, 2021
The stresses and deformations of an eccentric cylindrical cam during the process of hydro-joining have been calculated in orthogonal curvilinear coordinates according to the mechanical model of the cam and governing equations in terms of appropriate ...
Wang Kelin, Zhang Wei, Dou Yihua, Wang Xiaozeng, Cao Yinping   +4 more
doaj   +1 more source

Influences of Different Die Bearing Geometries on the Wire-Drawing Process

Metals, 2019
Metalworking is an essential process for the manufacture of machinery and equipment components. The design of the die geometry is an essential aspect of metalworking, and directly affects the resultant product’s quality and cost.
Gustavo Aristides Santana Martinez, Eduardo Ferro dos Santos, Leonardo Kyo Kabayama, Erick Siqueira Guidi, Fernando de Azevedo Silva   +4 more
doaj   +1 more source