Article
Engineering, Mechanical
T. Schirra, G. Martin, S. Puchtler, E. Kirchner
Summary: This paper presents an experimental setup and calculation procedure for measuring and predicting the electric impedance of rolling bearings as a sensor model for bearing loads. By considering unloaded rolling elements and the undeflected area of loaded rolling elements, the model has been improved to provide more accurate predictions compared to the state of the art. However, there is still a difference between measurement and calculation, which requires further approaches to reduce the discrepancy.
TRIBOLOGY INTERNATIONAL
(2021)
Article
Materials Science, Multidisciplinary
Mian Zhang, Xiqiang Ma, Nan Guo, Yujun Xue, Jishun Li
Summary: This paper studies the influence of thermal characteristics of cylindrical roller bearings on lubrication characteristics under actual working conditions, and analyzes the effects of parameters such as speed and load on lubrication under thermal effects. The numerical calculation method combining quasi-static model and thermal elastohydrodynamic lubrication model is adopted. The effects of speed, load, and thermal effect on lubrication performance and lubrication state are analyzed through numerical model calculation, and the correctness of the model is verified through oil film thickness measurement.
Article
Engineering, Electrical & Electronic
Gwanghee Hong, Kyobong Kim, Youngjun Park, Gunhee Jang
Summary: This paper proposes a numerical method to investigate the frictional characteristics of a fluid film journal bearing considering the elastohydrodynamic lubrication and the asperity contact force. The method is verified by comparing the calculated friction coefficient with experimental data, and it is applied to study the frictional characteristics of a scroll compressor journal bearing under dynamic loads.
Article
Multidisciplinary Sciences
Yanzhong Wang, Kai Yang, Xiaomeng Chu, Wen Tang, Changyong Huang
Summary: An engineering calculation model is introduced to analyze point-contact elastohydrodynamic lubrication of spiral bevel gears, revealing the transient lubrication characteristics and film thickness variations during the meshing process.
SCIENTIFIC REPORTS
(2021)
Editorial Material
Engineering, Mechanical
Luc Houpert
Summary: Dowson's film thickness relationship is crucial in the bearing industry for defining factors affecting bearing life. It also helps explain phenomena such as rolling element acceleration and skidding.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART J-JOURNAL OF ENGINEERING TRIBOLOGY
(2021)
Article
Engineering, Mechanical
G. Martin, Florian Michael Becke, E. Kirchner
Summary: This paper presents a novel condition monitoring method for rolling bearings based on measuring the electric bearing impedance. The method can diagnose damage presence through frequency-domain analysis and assess the severity and progression of bearing damage through time-domain analysis.
TRIBOLOGY INTERNATIONAL
(2022)
Article
Engineering, Mechanical
Akhil Vijay, Farshid Sadeghi
Summary: This study investigates the fatigue failure in rolling element bearings, considering the anisotropy of the bearing material and the coupled elastohydrodynamic lubrication. Finite element method is used to model the bearing steel microstructure and the EHL effects. The damage accumulation in the grain boundaries is utilized to model crack initiation and propagation, providing predictions for fatigue life. The model results demonstrate the stochastic nature of bearing failures reported in the literature.
TRIBOLOGY INTERNATIONAL
(2022)
Article
Engineering, Mechanical
Pascal Ehret, Ali Ghanbarzadeh
Summary: The paper discusses the developments made by Professor Dowson at Leeds University in elastohydrodynamic lubrication, from early solutions to his recent contributions in biotribology and mixed lubrication.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART J-JOURNAL OF ENGINEERING TRIBOLOGY
(2021)
Article
Engineering, Mechanical
S. Puchtler, T. Schirra, E. Kirchner, Y. Spaeck-Leigsnering, H. De Gersem
Summary: This study compares different methods for calculating the capacitance of unloaded rolling elements to improve the electric characterization of rolling element bearings. Semi-analytical approximations and finite element simulations are used, and a closed-form analytical two-dimensional solution is derived for comparison. The results show that the most common semi-analytical approximation, which uses effective radii to express the contact geometry, reproduces the trend from numerical and analytical calculations, but overestimates the results derived from numerical simulations. Another semi-analytical approach is presented that delivers better results for the capacitance of unloaded point contacts.
TRIBOLOGY INTERNATIONAL
(2022)
Article
Engineering, Mechanical
Alberto Porras-Vazquez, Nicolas Fillot, Philippe Vergne, David Philippon, Guillermo E. Morales-Espejel
Summary: This study focuses on characterizing the roller-end/flange contact in rolling-element bearings, specifically analyzing the impact of spinning and starvation on the film thickness. The goal is to provide analytical expressions to predict film thickness under specific operating conditions.
TRIBOLOGY INTERNATIONAL
(2021)
Article
Engineering, Mechanical
Nanrong Hu, Hekun Jia, Bifeng Yin, Zeyuan Zhou, Bo Xu
Summary: The elastohydrodynamic model of hydrodynamic air foil bearing is studied to investigate the influence of rotor speed, friction coefficient between bearing components, load and other parameters on the foil displacement of hydrodynamic air bearing under steady-state conditions. The static characteristics of hydrodynamic air foil bearing are predicted using numerical simulation. The results show that the radial displacement of the foil is smallest at both ends of the bearing and largest at the middle, while the top foil changes gently along the width away from the maximum pressure. Increasing the rotor speed improves the maximum fluid pressure and shifts the action position, with a significant impact on the maximum pressure. Change in the friction coefficient between the bump foil and the bearing sleeve has different effects on the foil displacement. Increasing the load reduces the longitudinal displacement of the bump foil at the fixed end, and the relative size of the friction coefficient between components affects the size and direction of the foil displacement at the same load.
JOURNAL OF TRIBOLOGY-TRANSACTIONS OF THE ASME
(2023)
Article
Engineering, Mechanical
Congcong Fang, Anyuan Zhu, Wei Zhou, Yongdong Peng, Xianghui Meng
Summary: This study investigates the stiffness and damping characteristics of elastohydrodynamic lubrication (EHL) contact, showing that stiffness force becomes more important with increasing load conditions while damping effects weaken. EHL stiffness is smaller than dry contact stiffness but the difference decreases with increasing load, and factors like entrainment velocity, lubricant viscosity, and curvature radii affect stiffness and damping.
Article
Engineering, Mechanical
Dov Avishai, Groper Morel
Summary: This study examines the application of water-lubricated bearings in the propulsion systems of naval vessels, analyzing their lubrication status through experimentation and modeling. The goal is to reduce environmental pollution risks and improve the operational performance of ships.
JOURNAL OF TRIBOLOGY-TRANSACTIONS OF THE ASME
(2021)
Article
Engineering, Mechanical
Leoluca Scurria, Tommaso Tamarozzi, Oleg Voronkov, Dieter Fauconnier
Summary: The study compared the performance of different methods under various elastohydrodynamic lubrication conditions, quantifying their differences to understand the advantages and limitations of each.
JOURNAL OF TRIBOLOGY-TRANSACTIONS OF THE ASME
(2021)
Article
Engineering, Chemical
Kai Liu, Chunli Lei, Ruizhe Song, Wei Xue, Jianhua Li
Summary: The elastohydrodynamic lubrication (EHL) model of angular contact ball bearings (ACBB) with local defects under spin condition is established. The local defect surface profile is characterized and a modified quasi-static model of ACBB with local defects is proposed. The comprehensive stiffness model of ACBB with local defect under EHL is built, and the influence of different factors on the mechanical characteristics of ACBB with local defect is investigated. The results show that the equivalent contact stiffness of the defect area decreases with the increase of the local defect size, while the contact load in non-defect area increases. Considering EHL, the contact deformation of bearing decreases, resulting in an increase in contact load and equivalent comprehensive stiffness. The axial contact angle of the defect area largely determines the equivalent comprehensive stiffness of the roller at the defect.
LUBRICATION SCIENCE
(2023)
Article
Engineering, Mechanical
Jing Wang, Peiran Yang, A. A. Lubrecht, Motohiro Kaneta
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART J-JOURNAL OF ENGINEERING TRIBOLOGY
(2015)
Article
Engineering, Mechanical
N. Biboulet, H. Bouassida, A. A. Lubrecht
TRIBOLOGY INTERNATIONAL
(2015)
Article
Engineering, Chemical
N. Biboulet, A. A. Lubrecht
Article
Materials Science, Multidisciplinary
Hanfeng Gu, Julien Rethore, Marie-Christine Baietto, Philippe Sainsot, Pauline Lecomte-Grosbras, Cornelis H. Venner, Antonius A. Lubrecht
COMPUTATIONAL MATERIALS SCIENCE
(2016)
Article
Engineering, Mechanical
N. Biboulet, H. Bouassida, J. Cavoret, A. A. Lubrecht
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART J-JOURNAL OF ENGINEERING TRIBOLOGY
(2017)
Article
Engineering, Mechanical
C. H. Venner, J. Wang, A. A. Lubrecht
TRIBOLOGY INTERNATIONAL
(2016)
Article
Engineering, Mechanical
M. -P. Noutary, N. Biboulet, A. A. Lubrecht
TRIBOLOGY INTERNATIONAL
(2016)
Article
Engineering, Mechanical
J. Fang, W. Ma, N. Biboulet, A. A. Lubrecht
TRIBOLOGY INTERNATIONAL
(2017)
Article
Engineering, Mechanical
R. Bugnicourt, P. Sainsot, N. Lesaffre, A. A. Lubrecht
TRIBOLOGY INTERNATIONAL
(2017)
Article
Engineering, Chemical
Martin H. Mueser, Wolf B. Dapp, Romain Bugnicourt, Philippe Sainsot, Nicolas Lesaffre, Ton A. Lubrecht, Bo N. J. Persson, Kathryn Harris, Alexander Bennett, Kyle Schulze, Sean Rohde, Peter Ifju, W. Gregory Sawyer, Thomas Angelini, Hossein Ashtari Esfahani, Mahmoud Kadkhodaei, Saleh Akbarzadeh, Jiunn-Jong Wu, Georg Vorlaufer, Andras Vernes, Soheil Solhjoo, Antonis I. Vakis, Robert L. Jackson, Yang Xu, Jeffrey Streator, Amir Rostami, Daniele Dini, Simon Medina, Giuseppe Carbone, Francesco Bottiglione, Luciano Afferrante, Joseph Monti, Lars Pastewka, Mark O. Robbins, James A. Greenwood
Article
Engineering, Chemical
R. Bugnicourt, P. Sainsot, D. Dureisseix, C. Gauthier, A. A. Lubrecht
Article
Engineering, Mechanical
Jing Wang, A. A. Lubrecht, Petr Sperka, Milan Omasta, Motohiro Kaneta
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART J-JOURNAL OF ENGINEERING TRIBOLOGY
(2015)
Article
Engineering, Mechanical
M. Denni, N. Biboulet, V. Abousleiman, A. A. Lubrecht
TRIBOLOGY INTERNATIONAL
(2020)
Article
Engineering, Mechanical
Ton Lubrecht, Nans Biboulet, Kees Venner
Summary: The paper summarizes the contributions of Dowson, Higginson, and Hamrock to numerical line contact elastohydrodynamic lubrication and film thickness prediction in elliptical contacts, finding that the predicted results are accurate, especially under pure rolling conditions.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART J-JOURNAL OF ENGINEERING TRIBOLOGY
(2021)
Article
Engineering, Mechanical
Ton Lubrecht, Kees Venner
Summary: The current paper focuses on Dr. R. Gohar's research on impacting ball and pressure spike measurement. It discusses contributions from other researchers in these two fields and combines them in a numerical study. The study reveals the position and velocity variation of the pressure spike over time, concluding that its shape also varies with time.
Article
Engineering, Mechanical
Huiyi Yang, Yang Xu, Chao Xu
Summary: This study focuses on the impact of dry friction interfaces on the dynamics of jointed structures, particularly on the statistics of contact pressure distribution. Through experimental and simulation analysis, it is found that surface roughness and contact load have significant effects on contact area, contact stiffness, and mean contact pressure.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART J-JOURNAL OF ENGINEERING TRIBOLOGY
(2024)
Article
Engineering, Mechanical
Guanglan Hu, Houfu Dai
Summary: The effect of metal coating on the machinability of cubic silicon carbide was investigated using molecular dynamics simulation. The results showed that the type of coating has a significant impact on cutting force, surface morphology, stress, and tool wear. Among the three metals studied, Cu coating had the greatest impact on improving cutting performance.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART J-JOURNAL OF ENGINEERING TRIBOLOGY
(2024)
Article
Engineering, Mechanical
Yunfan Liu, Guozheng Ma, Lina Zhu, Cuihong Han, Zhen Li, Bin Zhang, Haichao Zhao, Haidou Wang, Shuying Chen
Summary: The service performance of coated self-lubricating spherical plain bearings can be improved by applying self-lubricating coatings, especially double-sided coatings. The presence of a large-area and complete mixed friction transfer film on the contact surfaces can cause a signal downstage before the signal mutation stage.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART J-JOURNAL OF ENGINEERING TRIBOLOGY
(2024)
Article
Engineering, Mechanical
Yakup Artun, C. Oktay Azeloglu, Gokhan Taylan
Summary: This article investigates the tribological properties of polymer journal bearings, particularly focusing on radial journal bearings made from UHMWPE and POM materials with different surface qualities. The study examines the performance of these bearings under varying load and speed conditions, and analyzes the relationship between material and surface roughness in tribological performance.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART J-JOURNAL OF ENGINEERING TRIBOLOGY
(2024)
