Journal of Tribology: Recent submissions
Now showing items 781-800 of 7312
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Study on the Lubrication Characteristics of Spur Gear Pairs With Low Sliding Ratio Under Mixed Elastohydrodynamic Lubrication
(The American Society of Mechanical Engineers (ASME), 2022)The relative sliding at the meshing point directly affects the contact and lubrication characteristics of the gear pair and is an important factor of gear wear and power loss. In this study, for investigation of a new type ... -
Vibration-Based Fault Diagnosis of Helical Gear Pair With Tooth Surface Wear Considering Time-Varying Friction Coefficient Under Mixed Elastohydrodynamic Lubrication Condition
(The American Society of Mechanical Engineers (ASME), 2022)Based on “slice method,” the improved time-varying mesh stiffness (TVMS) calculation model of helical gear pair with tooth surface wear is proposed, in which the effect of friction force that obtained under mixed ... -
Boundary Slip-Induced Temperature Rise and Film Thickness Reduction Under Sliding/Rolling Contact in Thermal Elastohydrodynamic Lubrication
(The American Society of Mechanical Engineers (ASME), 2022)Temperature rise and film thickness reduction are the most important factors in elastohydrodynamic lubrication (EHL). In the EHL contact area, interfacial resistances (velocity/thermal slips) induced by the molecular ... -
Bearing Life Calculations in Rotating and Oscillating Applications
(The American Society of Mechanical Engineers (ASME), 2021)This article begins by describing standard bearing life models in continuous rotation before going on to explain how the bearing life can be calculated for roller and ball bearings in oscillatory applications. An oscillation ... -
The Contact Mechanics for Indentation of Single Asperity and Rough Surfaces
(The American Society of Mechanical Engineers (ASME), 2022)A finite element analysis of a rigid sphere contact with a deformable elastic–plastic plat called indentation model is studied. The numerical results are applied on the rough surfaces contact of the Greenwood-Williamson ... -
Thick Si-Doped DLC Coatings With High Load Bearing Capacity on Cold Working Tool Steels by PECVD
(The American Society of Mechanical Engineers (ASME), 2022)For improving the wear resistance, thick silicon doped hydrogenated amorphous carbon (a-SiC:H) coatings were deposited on cold working tool steels by plasma-enhanced chemical vapor deposition (PECVD) technology. The increase ... -
Investigation of Oil–Air Flow and Temperature for High-Speed Ball Bearings by Combining Nonlinear Dynamic and Computational Fluid Dynamics Models
(The American Society of Mechanical Engineers (ASME), 2022)An improved nonlinear dynamic model of high-speed ball bearings with elastohydrodynamic lubrication is adopted to predict the movements of balls and power loss of ball bearings for defining the boundary conditions of a ... -
Effects of Different Friction Coefficients on Input Torque Distribution in the Bolt Tightening Process Based on the Energy Method
(The American Society of Mechanical Engineers (ASME), 2022)Bolted joints are one of the most common fastening methods in engineering applications. To meet the requirements of structural parts, the torque method is often used for controlling the bolted joint performance. However, ... -
Modeling and Analysis for the Transmission Characteristics of a Proposed Dual-Drive Hydrostatic Lead Screw System
(The American Society of Mechanical Engineers (ASME), 2022)This paper proposes a novel dual-drive hydrostatic lead screw system (DDHLS). The design enables a lower feed speed and a better transmission performance than the conventional hydrostatic lead screw (HLS). Considering the ... -
Analytical Investigation of Roller Skew and Tilt in a Spherical Roller Bearing
(The American Society of Mechanical Engineers (ASME), 2022)The objective of this investigation was to analytically investigate the performance of a spherical roller bearing (SRB) operating under various loading and speed combinations. In order to achieve the objective, a full six ... -
A Modified Discrete Scheme in the Ausas Cavitation Algorithm
(The American Society of Mechanical Engineers (ASME), 2022)In order to reduce the dependence of accuracy on the number of grids in the Ausas cavitation algorithm, a modified Ausas algorithm was presented. By modifying the mass-conservative Reynolds equation with the concept of ... -
Experimental Study of the Sealing Performance of Metal on Polymer Conical Seals
(The American Society of Mechanical Engineers (ASME), 2021)This study describes an experimental investigation of the sealing performance of a metallic conical poppet and a polymeric annular seat with a round sealing edge. The experiments were carried out with nitrogen. The influence ... -
A Nonhomogeneous Bulk Flow Model for Gas in Liquid Flow Annular Seals: An Effort to Produce Engineering Results
(The American Society of Mechanical Engineers (ASME), 2021)Seals in multiple-phase rotordynamic pumps must operate without compromising system efficiency and stability. Both field operation and laboratory experiments show that seals supplied with a gas in liquid mixture (bubbly ... -
Synergistic Lubricating Performance of h-BN/GF Nanoparticles as Oil Additives for Steel-Steel Contact
(The American Society of Mechanical Engineers (ASME), 2021)The major objective of this work is to investigate the synergistic lubricating performance of hexagonal boron nitride (h-BN) and graphite fluoride (GF) nanoparticles (NPs) in white oil. The tribological tests were carried ... -
Effects of Soaking in Water, Base Oil, Ionic Liquid, and Grease of an Epoxy/UHMWPE/MoS2 Composite on Mechanical and Tribological Properties
(The American Society of Mechanical Engineers (ASME), 2021)Liquid absorption and tribological studies of epoxy-based composite with ultra-high molecular weight polyethylene and MoS2, sliding against steel, were conducted. Composites, as coating and as a bulk, were soaked in water, ... -
Variation of Lubricant Distribution Across the Radial Direction in a Journal Bearing
(The American Society of Mechanical Engineers (ASME), 2021)A computational fluid dynamics analysis of two-phase flow was used to obtain the distribution of lubricant in a journal bearing, including inlet tube and groove. It was found that for an incomplete starting film, the oil ... -
Tuning of Friction Oscillation Amplitude in Halloysite, Montmorillonite, and Wollastonite Filled Friction Composites: Load, Speed, and Temperature Sensitivity
(The American Society of Mechanical Engineers (ASME), 2021)The influence of clay mineral silicate types, such as halloysite, montmorillonite, and wollastonite with tubular, plate like, and acicular morphologies respectively, on frictional oscillation of composite materials has ... -
Friction and Wear of Polyetheretherketone Samples With Different Melt Flow Indices
(The American Society of Mechanical Engineers (ASME), 2021)Polyetheretherketone (PEEK) is a promising polymer material for tribological applications. Friction and wear tests of PEEK samples versus steel with different melt flow indices (MFI) were studied. The results showed ... -
Full-Scale Dynamometer Tests of Composite Railway Brake Shoes: Effect of the Resin-Rubber Ratio on Friction Performance and Wear
(The American Society of Mechanical Engineers (ASME), 2021)Designing a friction material for a brake system entails considering the effects of each constituent and the interactions that they may present between them. In the present work, a characterization of the influence of the ... -
Tribological Behavior of Alumina Ceramics With Nano-TiO2 as a Sintering Aid in Non-Conformal Contact
(The American Society of Mechanical Engineers (ASME), 2021)The study emphasized the sintering behavior and tribo-mechanical properties of alumina ceramics by nano-TiO2 addition as a sintering aid. With increase in sintering temperature, the bulk density of alumina has increased ...