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in lubrication and antifriction. Consequently, both the wear rate and wear coefficient decrease gradually. According to the empirical formula [23]: ... pairs and acts as lubrication. It is beneficial to the reduction of friction coefficient by effectively alleviating the wear of the composites. With the increase of sliding distance, however......
Effect of Pressure on Boundary Slip of Thin Film Lubrication Using Atomistic Simulation潘伶,ZHANG Hao,LU Shiping,CHEN YouhongSchool of Mechanical Engineering and Automation, Fuzhou University摘 要:Mechanical systems on all length scales may be subjected to nanoscale thin film lubrication(TFL). Molecular dynamics(MD) simulations were conducted to investigate......
considering the permeability coefficient variation. When ignoring the change of permeability coefficient, a equals zero. Meanwhile, for road and railway tunnels, there is no internal pressure. So...J. Cent. South Univ. (2017) 24: 1612-1618 DOI: 10.1007/s11771-017-3566-x Water inflow forecasting for tunnel considering nonlinear variation of permeability coefficient CHENG Pan(程盼)1, ZHAO Lian......
Preparation and Characteristic of Glass-Ceramics with Super Low Thermal Expansion Coefficient Wang Kun1,Zhao Chunxia1,Jiang Hui1,Chen Guangle1,Wang Shengjun1,Fan Shigang1 (1.Research Institute of Synthetic Crystals, Beijing 100018, China) Abstract:The preparation technics of glass-ceramics with super low coefficient of thermal expansion containing β-quartz solid solution as a main crystal......
:A Calculation model of activity coefficient for NaOH-NaAl(OH)4-Na2CO3-H2O system PENG Xiao-qi1, 2, 3, SONG Guo-hui1, SONG Yan-po1, 2, ZHANG Jian-zhi1, LIU Zhen-guo1 (1... and Na2CO3 were obtained by calibration regression on their experimental activity coefficients. The activity coefficient calculation model for NaOH-NaAl(OH)4-Na2CO3-H2O system was established based......
on the theory of unsteady hydrodynamic lubrication and relevant mathematic and physical methods, a basic model was developed to analyze the unsteady lubrication film thickness, pressure stress and friction.... The pressure and friction gradients are rather small at high back tension. The pressure-sensitive lubricant viscosity increases exponentially with the increase of pressure. The unsteady lubrication phenomenon......
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J. Cent. South Univ. (2021) 28: 1546-1554 DOI: https://doi.org/10.1007/s11771-021-4695-9 Relationship between critical seismic acceleration coefficient and static factor of safety of 3D slopes SHI... acceleration coefficient, while little attention has been given to the relationship between the slope stability numbers and the critical seismic acceleration coefficient. This study aims to investigate......
dies. The expected properties of the deposited coating include excellent wear and erosion-resistance, superlow friction coefficient and chemical affinity to workpiece materials. During last decade.... Meanwhile, it still presents competitive wear resistance with the MCD films. Finally, the working lifetime and performance of as-fabricated USCD coated drawing dies were examined under producing low-carbon......
friction properties under water or oil lubrication than non-impregnated graphite, and the impregnated graphite could remain in the stable friction regime under high pressure × velocity(pv).Based......
