Journal of Tribology: Recent submissions
Now showing items 761-780 of 7312
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Active Fluid-Film Bearing With Deep Q-Network Agent-Based Control System
(The American Society of Mechanical Engineers (ASME), 2022)Despite the fact that the hydrodynamic lubrication is a self-controlled process, we designed control systems based on proportional integral (PI) controller, adaptive PI controller, and Deep Q network (DQN)-agent to minimize ... -
Stochastic Analysis of Lubrication in Misaligned Journal Bearings
(The American Society of Mechanical Engineers (ASME), 2022)Misalignment is common in hydrodynamic journal bearings and the causes of it can be diversified, making the lubrication performance exhibits stochasticity. Lubricant viscosity often heavily depends on temperature, which ... -
Texture Optimization and Verification for the Thrust Bearing Used in Rotary Compressors Based on a Transient Tribo-Dynamics Model
(The American Society of Mechanical Engineers (ASME), 2022)Rotary compressors are designed more and more compact, and the compressor cylinder’s ambient pressure is designed very high to facilitate oil separation and improve efficiency. However, these designs cause the working ... -
A Mechanism-Based General Theory for Friction of PTFE/PEEK Composite: Effects of PTFE Morphology and Composite Microstructure
(The American Society of Mechanical Engineers (ASME), 2022)A combined experimental and analytical investigation is conducted to develop a mechanism-based general friction theory for PTFE/PEEK composite. The PTFE/PEEK composites with PTFE and PEEK volume contents ranged from 0% to ... -
Effect of Al2O3 Nanoparticles as Reinforcement on the Wear Properties of A356/Al2O3 Nanocomposites Produced by Powder Metallurgy
(The American Society of Mechanical Engineers (ASME), 2022)In this study, microstructure and wear properties of A356 aluminum matrix nanocomposites reinforced with nano-Al2O3 particles were investigated. The powder metallurgy method was used for the production of 1 wt% and 2 wt% ... -
Development of a Machine Learning Model for Elastohydrodynamic Pressure Prediction in Journal Bearings1
(The American Society of Mechanical Engineers (ASME), 2022)This paper presents a machine learning neural network capable of approximating pressure as the distributive result of elastohydrodynamic (EHD) effects for a journal bearing at steady state. Design of efficient, reliable ... -
Thermal-Elastohydrodynamic Contacts Lubricated With Oil/Refrigerant Solutions: A New Cavitation Modeling Approach Based on Refrigerant Solubility
(The American Society of Mechanical Engineers (ASME), 2022)A first cavitation modeling with thermal effects for oil/refrigerant solutions lubricated elastohydrodynamic point contacts is reported in this work. The solubility of the oil/refrigerant system is introduced into the ... -
A Fast Thermoelastic Model Based on the Half-Space Theory Applied to Elastohydrodynamic Lubrication of Line Contacts Involving Free Boundaries
(The American Society of Mechanical Engineers (ASME), 2022)This study allows contact models based on semi-analytical methods including the impacts of thermoelastic deformations in contacts of finite dimension bodies. The proposed method controls heat flows crossing free boundaries. ... -
Synthesis of ZnO/TiO2-Based Hydrophobic Antimicrobial Coatings for Steel and Their Roughness, Wetting, and Tribological Characterization
(The American Society of Mechanical Engineers (ASME), 2022)We synthesized novel TiO2/ZnO-phosphate (TP/ZP) and polymethyl hydrogen siloxane (PMHS)-based two-layer hydrophobic coatings with potential antimicrobial properties tuned for application on steel substrates. The mathematical ... -
Tribological Characterization of TiAlC Nanostructured Coatings Deposited by DC Pulse Magnetron Sputtering
(The American Society of Mechanical Engineers (ASME), 2022)To reveal the effect of carbon content on tribological performance of coatings, TiAlC films having four different amounts of carbon content were synthesized using DC pulse magnetron sputtering. The amount of carbon was ... -
A Novel Semiemperical Friction Coefficient Model Between Needle and Polyvinyl Alcohol Tissue Phantom and Its Validation by Using Computational Inverse Technique
(The American Society of Mechanical Engineers (ASME), 2022)Needle–tissue interactive force is vital for developing a virtual simulation and planning system (SPS) and optimizing needle control strategy, wherein the friction coefficient is an important parameter but difficult to ... -
Vibration Analysis of Deep Groove Ball Bearing Using Finite Element Analysis and Dimension Analysis
(The American Society of Mechanical Engineers (ASME), 2022)Condition monitoring of rotor dynamic is recognized as an advanced preventative maintenance technique for fault-free operation. Faulty bearings in rotating machines may cause severe problems and even untimely breakdowns. ... -
Determination of Critical Temperature of Scuffing for AISI 8620 Steel Gear Contacts Lubricated by Dexron 6 Through Computational Simulation of Experiment
(The American Society of Mechanical Engineers (ASME), 2022)This study establishes the critical temperature of scuffing for contacts of gears made of AISI 8620 steel alloy, lubricated by Dexron 6 oil. Through thermal mixed elastohydrodynamic lubrication modeling, experimental ... -
Amphiphilic Zirconium Phosphate Nanoparticles as Tribo-Catalytic Additives of Multi-Performance Lubricants
(The American Society of Mechanical Engineers (ASME), 2022)The advancement of electric vehicles demands lubricants with multifunction and performance. In this research, we investigated amphiphilic ZrP nanoparticles as lubricant additives. Experiments showed that the nanolubricant ... -
Investigating the Dynamic Characteristics of the Hydrostatic Bearing Spindle System With Active Piezoelectric Restrictors
(The American Society of Mechanical Engineers (ASME), 2022)Studies show that active control technology can improve system performance and meet the increasing industrial demand in diverse applications. In the present study, the dynamic characteristics of the bearing spindle system ... -
Investigation of Fault Modeling in the Identification of Bearing Wear Severity
(The American Society of Mechanical Engineers (ASME), 2021)Recent research into machines involved in power generation processes has demanded deep investigation of model-based techniques for fault diagnosis and identification. The improvement of critical fault characterization is ... -
Parametric Study of Flexure Pivot Bearing Induced Thermal Bow-Rotor Instability (Morton Effect)
(The American Society of Mechanical Engineers (ASME), 2021)This paper investigates the journal asymmetric temperature-induced thermal bow vibration of a rotor, as supported by a flexure pivot journal bearing (FPJB). Thermal bow-induced vibration, known as the Morton effect (ME), ... -
Two-Body Abrasive Wear Behavior and Its Correlation With Mechanical Properties of Aged AA6063 Alloy
(The American Society of Mechanical Engineers (ASME), 2022)This study aims to correlate the abrasive wear performance with mechanical properties, considering AA6063 Al–Mg–Si alloy as the model material. The selected alloy specimens are subjected to artificial ageing at 150 °C for ... -
Influence of Electric Current on the Wear Topography of Electrical Contact Surfaces
(The American Society of Mechanical Engineers (ASME), 2022)Wind pitch slip ring consists of several circuits applied with changing electric current, which makes the wear mechanism extremely complicated. The aim of this paper is to study the influence of electric current on the ... -
Study the Effect of Nitrogen Content on the Friction and Wear Properties of Zr-Cu-Ni-Al Bulk Metallic Glasses
(The American Society of Mechanical Engineers (ASME), 2022)The effects of nitrogen on friction and wear properties of Zr-based bulk metallic glasses were investigated experimentally. Bar like metallic glasses were prepared by copper mold suction casting method. X-ray diffraction ...