Results 101 to 110 of about 88,799 (310)
Space shuttle orbiter auxiliary power unit development challenges [PDF]
, 1985 When the flying spacecraft was approved for development, a power unit for the hydraulic system had to be developed. Unlike other systems on the orbiter, there was no precedent in earlier spacecraft for a hydraulic system nor for the power unit to drive ...
Lance, R., Weary, D.
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PyFrac: A planar 3D hydraulic fracture simulator
, 2020 Fluid driven fractures propagate in the upper earth crust either naturally or in response to engineered fluid injections. The quantitative prediction of their evolution is critical in order to better understand their dynamics as well as to optimize their
Lecampion, Brice, Zia, Haseeb
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MachinesAerostatic conical bearings with micro-orifices (ACBMOs) can simultaneously withstand both radial and axial external loads and have high power density. Nevertheless, due to the larger surface-to-volume ratio and length-to-diameter ratio of micro-orifices,
Qilong Han, Xiaoli Wang, Chen Zheng
doaj +1 more source
Advanced Materials Interfaces, EarlyView.Sputtered WS2 films were investigated in terms of their S‐ and O‐concentration depending on deposition power and pre‐sputter time. Chemical and structural investigations were done using EDS, TEM, SEM, AFM, XRD. In general, 20 W films exhibit a wide variation in stoichiometry and structure whereas 80 W films demonstrate a higher S/W ratio than 20 W ...
Theresa Scheler +4 more
wiley +1 more source
The effects of material combination and surface roughness in lubricated silicon nitride/steel rolling contact fatigue [PDF]
, 2003 Four kinds of commercially finished 12.7 min HIPed silicon nitride bearing balls with surface roughness values R-a ranging from 0.002 to 0.016 mum were tested using a four-ball rolling configuration.
Ahmed, R, Hadfield, M, Kang, J
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Jixie chuandong, 2018 To improve the lubrication performance,anti-scuffing capacity and efficiency of enveloping worm,the elastohydrodynamic lubrication（ EHL） line contact model is established based on the research of meshing performance of inclined double-roller enveloping ...
Ou Yue +4 more
doaj
Effect of Surface‐Lubricant Compatibility on Bubble Formation in Lubricant‐Infused Surfaces
Advanced Materials Interfaces, EarlyView.Lubricant‐infused surfaces reduce drag partly through bubbles that form when lubricant depletes. Using laser‐textured steel infused with silicone oil, we show that microbubble nucleation occurs even on surfaces fully wetted by the lubricant, regardless of chemistry.
Leo James +4 more
wiley +1 more source
Dynamic and thermal analysis of high speed tapered roller bearings under combined loading [PDF]
The development of a computer program capable of predicting the thermal and kinetic performance of high-speed tapered roller bearings operating with fluid lubrication under applied axial, radial and moment loading (five degrees of freedom) is detailed ...
Crecelius, W. J., Milke, D. R.
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Characterising the friction and wear between the piston ring and cylinder liner based on acoustic emission analysis [PDF]
, 2014 In this paper, an experimental investigation was carried out to evaluate the friction and wear between the cylinder liner and piston ring using acoustic emission (AE) technology.
Ball, Andrew +4 more
core
Anti‐Slip Material‐Based Strategies and Approaches
Advanced Materials Technologies, EarlyView.This review highlights the principle mechanisms of slipping at the microscale, linking contact mechanics with a friction behavior model for surface interfaces. Main strategies to develop anti‐slip properties to the surfaces are discussed alongside standardized testing approaches.
Sogand Abbaspoor‐Zanjani +3 more
wiley +1 more source