Journal of Tribology: Recent submissions
Now showing items 941-960 of 7312
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Rotational Rheometry of a Fumed Silica Lubricating Grease
(The American Society of Mechanical Engineers (ASME), 2020)The rheological properties of lubricating greases are the governing properties for performance assessment in lubrication applications. These properties can be determined under both controlled stress and strain rheometry. ... -
Anisotropy Characterization Using Abbott–Firestone Curves
(The American Society of Mechanical Engineers (ASME), 2020)In this work, we use the Abbott–Firestone curve as the basis to develop a simple quantitative approach to measure the anisotropy of a surface. The main idea is to measure the difference between the curves for two mutually ... -
Research on Turbulent Lubrication of Misaligned Journal Bearing Considering the Axial Motion of Journal
(The American Society of Mechanical Engineers (ASME), 2020)Based on the coordinate transformation method, the generalized turbulent lubrication equation considering the axial motion of the journal is derived. The finite-difference method is used to solve the generalized turbulent ... -
Tribological Property Investigation of Self-Lubricating Molybdenum-Based Zirconia Ceramic Composite Operational at Elevated Temperature
(The American Society of Mechanical Engineers (ASME), 2020)Three mol% yttria-stabilized tetragonal zirconia polycrystals (3Y-TZP) with 0.5 wt% of magnesium oxide (MgO) and 6 wt% of molybdenum (Mo) were prepared by the pressureless sintering process, and the friction and wear ... -
Hydrodynamic Performance Characteristics of a Fluid Film Journal Bearing With a Rectangular Jacking Pocket
(The American Society of Mechanical Engineers (ASME), 2020)To compensate for an extremely heavy journal, jacking pockets can be added to the surface of pads in fluid film bearings. Jacking pockets can range in size and shape and will have an influence on the hydrodynamic performance ... -
Optimization of Al2O3 and TiO2 Blends to be Used as Erosion Resistant Coating for Mild Steel
(The American Society of Mechanical Engineers (ASME), 2020)In the hydro power plants, mild steel pipes are used to transport river water from Dam to the turbine house. This water usually contains sand particles that are also transported through these pipelines that are observed ... -
Vibration Analysis of Deep Groove Ball Bearings With Local Defect Using a New Displacement Excitation Function
(The American Society of Mechanical Engineers (ASME), 2020)Bearings are vital parts of many mechanical equipment, the vibration signal analysis of bearings with local defects is important in guiding the fault diagnosis. In this paper, a dynamic analysis method is proposed to ... -
The Necessary Condition for a Hard Coating to Strengthen a Coated Sphere
(The American Society of Mechanical Engineers (ASME), 2020)The yield resistance of a coated sphere subjected to normal contact loading is studied based on a finite element analysis. Moderately hard coatings that were omitted in previous literature are considered. A maximum ... -
Experimental Assessment of a 3D-Printed Stainless Steel Gas Foil Bearing
(The American Society of Mechanical Engineers (ASME), 2020)Gas foil bearings (GFBs) are a key enabling technology for high-speed turbomachinery. The manufacturing of GFBs relies mainly on sheet metal forming techniques in order to conceive the compliant structure (e.g., bump foil) ... -
Tribological Performance of Steel With Multi-Layer Graphene Grown by Low-Pressure Chemical Vapor Deposition
(The American Society of Mechanical Engineers (ASME), 2020)To explore the potential of directly grown multi-layer graphene as an agent in reducing friction and wear of steel on steel tribo-pair, multi-layer graphene films were synthesized on GCr15 steel in a low-pressure chemical ... -
Friction and Wear Characterization of Spark Plasma Sintered Hybrid Aluminum Composite Under Different Sliding Conditions
(The American Society of Mechanical Engineers (ASME), 2020)Friction and wear behaviors of hybrid aluminum matrix self-lubricating nanocomposite, containing varying amount of nano-aluminum oxide (Al2O3) and graphene nanoplatelet (GNP) particles were investigated under dry and ... -
Study Tribological Properties of MoDTC and Its Interactions With Metal Detergents
(The American Society of Mechanical Engineers (ASME), 2020)Recently, the synergistic tribological properties between molybdenum dialkyldithiocarbamate (MoDTC) and metal detergents have been the focus of significant attention due to the high requirements of engine oil. In this ... -
Numerical Study on Effect of Thermal Conductivity in Point Contacts With Longitudinal Roughness on Abnormal Pressure Distribution
(The American Society of Mechanical Engineers (ASME), 2020)In order to clarify the effect of thermal conductivity on non-Newtonian thermal elastohydrodynamic lubrication (EHL) in the point contact with longitudinal roughness on one surface or on both surfaces, numerical calculations ... -
Dynamic Frictional Slip Along Rock Faults
(The American Society of Mechanical Engineers (ASME), 2020)The dynamic behavior of rock faults reflects the response of the shape and composition of the fault to the applied loading and environmental conditions. The interaction between the fault properties and the loading system ... -
Tribological Evaluation of Electrical Resistance of Lubricated Contacts
(The American Society of Mechanical Engineers (ASME), 2020)We report a tribo-electrochemical configuration to conduct in situ measurement of electrical conductivity and thickness of lubricating oils against friction. Results showed the non-ohmic behavior of a lubricating film in ... -
Influence of Power on Interplay of Microstructure and Erosion-Tribo Performance of Microwave Composite Clads
(The American Society of Mechanical Engineers (ASME), 2020)Metal matrix composite (MMC) clads were developed through microwave cladding technique on CA6NM substrate using different microwave power levels. The influence of microwave power was investigated on the microstructure, ... -
A Study of Hole-Entry Grooved Surface Hybrid Spherical Journal Bearing Operating With Electrorheological Lubricant
(The American Society of Mechanical Engineers (ASME), 2020)The performances of the tribo-pairs are greatly influenced by introducing the grooved surfaces. Developments of the newer type of lubricants have made a great impact on the performance of fluid film bearings. This article ... -
Compliant Hydrostatic Bearings Utilizing Functionally Graded Materials
(The American Society of Mechanical Engineers (ASME), 2020)Deformability of hydrostatic bearings could potentially increase their application range significantly. When a bearing is made compliant, the film pressure starts to influence the deformation of the support itself. This ... -
Enhancing Wear Resistance of Selective Laser Melted Parts: Influence of Energy Density
(The American Society of Mechanical Engineers (ASME), 2020)Selective laser melting (SLM) is a rapidly developing metal additive manufacturing technology. SLM process parameters have a direct impact on the microstructure of parts, which further affect wear behaviors. Increasing the ... -
On the Negative Influence of Roller-End Axial Profiling on Friction in Thermal Elastohydrodynamic Lubricated Finite Line Contacts
(The American Society of Mechanical Engineers (ASME), 2020)This paper presents a finite element model for the solution of thermal elastohydrodynamic lubrication in finite line contacts, including edge effects. The model is used to investigate the influence of roller-end axial ...