Article
Engineering, Mechanical
Brett Friskney, Mahdi Mohammadpour, Stephanos Theodossiades, Christopher Craig, Greg Rapson
Summary: In this study, an 8-speed transmission system was modeled using the finite element method, comparing the system responses with linear and nonlinear bearings, rigid and flexible shafts. It was found that the flexible model improved the system accuracy and predicted the bearing load oscillation. This research demonstrates the significant impact of local nonlinear effects and flexible components on system response and bearing life prediction for system-level analysis.
MECHANISM AND MACHINE THEORY
(2021)
Article
Computer Science, Interdisciplinary Applications
Shengnan Zhang, Z. L. Sun, Zhenliang Yu, Fanyi Guo
Summary: This paper presents a method for predicting the transient contact position of gears at the meshing point based on the equivalent contact model. By continuously updating the contacting surface profiles through changing pressure angle and chord tooth thickness, the model accurately calculates equivalent pressure angles and surface profiles.
ENGINEERING COMPUTATIONS
(2021)
Article
Engineering, Mechanical
Balint Fazekas, Christoph Burkhart, Sarah Staub, Stefan Thielen, Heiko Andrae, Tibor J. Goda, Bernd Sauer, Oliver Koch
Summary: This paper proposes a revised and improved comprehensive finite element model to study the effects of ageing and viscous nature on the clamping force decrease and predicted wear in seals. The model considers various factors such as seal geometry, wear, temperature, viscoelasticity, and ageing. The study's novel characteristics include the use of actual seal geometry determined by new measurement approaches and temperature-and ageing-dependent hyper-viscoelastic constitutive constants obtained from both quasi-static and dynamic test results. The findings indicate that ageing has a moderate effect on clamping force, while the viscous nature of rubber significantly affects both clamping force and predicted wear in seals.
TRIBOLOGY INTERNATIONAL
(2023)
Article
Green & Sustainable Science & Technology
M. J. Jackson, G. M. Robinson, M. D. Whitt, R. B. da Silva, M. B. da Silva, A. R. Machado
Summary: This study investigates the wear mechanisms of cutting tools coated with functional graded nanostructured coatings in subtractive manufacturing processes using advanced measurement techniques such as x-ray fluorescence technology. The results show that commercially-available coated tools can reduce chemical species diffusion and create an effective chemical barrier during machining. It is also found that the thermal properties of coatings do not correlate with tool wear. Additionally, flank wear as a function of machining duration is a reliable method for assessing the transition of wear stages during clean machining operations.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Materials Science, Multidisciplinary
Hang Cheng, Fang Zhou, Zihao Fei
Summary: This paper investigates the application of laser surface texturing (LST) in enhancing the tribological properties of YG6X cemented carbide. Three different groove textures with varying spacing were produced on the carbide surface using a femtosecond laser. Friction experiments and simulations were conducted under different friction conditions. The results demonstrate that the texture surface is beneficial when sliding against Si3N4 but not effective in reducing the coefficient of friction against Ti6Al4V titanium alloy. Higher stress values lead to material destruction and increased friction and wear area for Si3N4 sliding, while Ti6Al4V titanium alloy sliding results in more wear and abrasive chip generation with higher stress values.
Article
Engineering, Biomedical
Shawn Ming Song Toh, Ariyan Ashkanfar, Russell English, Glynn Rothwell
Summary: In this study, a fretting wear algorithm was developed to investigate wear damage on bearing surfaces of THRs, predicting linear and volumetric wear rates effectively. Results showed comparable wear rates to in-vivo THRs and matched wear patterns from conventional polyethylene liners, offering potential for reducing wear rates in THR design and clinical techniques.
JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS
(2021)
Article
Engineering, Mechanical
Sahar Ghatrehsamani, Saleh Akbarzadeh, M. M. Khonsari
Summary: During the running-in stage of mechanical components, a model is developed to predict the changes in wear rate, friction coefficient, and surface asperities. Experimental results validate the predictions, showing acceptable agreement between predicted and actual data.
TRIBOLOGY INTERNATIONAL
(2022)
Article
Polymer Science
Ce Liang, Min Li, Yi Li, Jicai Liang, Qigang Han
Summary: Inspired by the convex hull structure of the dung beetle head's surface, a rubber bushing with a representative structure was designed based on bionics principles. The hyper-viscoelastic constitutive model was selected and the two-direction motion characteristics of the flexible friction pair were analyzed through numerical simulation and experimental research. The bionic design with the best drag reduction and wear resistance was determined.
Article
Engineering, Mechanical
Jingwei Xiao, Wenjie Qin, Shangjie Xu
Summary: This paper investigated the influence of bushing thickness and interference on the pressing force of the connecting rod small end in a V-type diesel engine using finite element method. Suitable bushing thickness and interference were determined and verified for the connecting rod small end considering the strength of the bushing and the stiffness of the small end.
ENGINEERING FAILURE ANALYSIS
(2021)
Article
Automation & Control Systems
Yaonan Cheng, Chunjie Ma, Jianyu Zhang, Huan Zhou, Liming Xin, Xinyu Wang
Summary: This study investigates the wear mechanism of high-speed dry gear hobbing through theoretical support, finite element simulation analysis, and experimental verification. The study discusses the variations and characteristics of cutting force, tool temperature distribution, tool wear, and wear morphology and mechanism under different cutting parameters.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2022)
Article
Thermodynamics
Hao Guo, Haitao Duan, Jianzhong Lei, Dongfeng Wang, Sanming Du, Yongzhen Zhang, Zongye Ding
Summary: This study conducted a failure analysis on the engine water pump shaft bearing using various methods, clarified the wear behavior and failure mechanisms, and proposed preventive measures. The failure of the bearing was reflected in the fracture of the bearing cage and serious wear of the roller and mandrel.
ADVANCES IN MECHANICAL ENGINEERING
(2021)
Article
Energy & Fuels
Yunfei Shi, Gengsheng Xie, Qingyu Wang, Xiukun Li, Xi Yang, Peng Liu, Zongren Peng
Summary: This paper studies the electric field distribution characteristics of UHV through wall bushing, and obtains the electric field distribution law under different voltage types, as well as the radial axial electric field distribution of the capacitor core and the edge electric field distribution of the upper and lower steps. The research results provide optimization ideas for the insulation structure design of UHV through wall bushing.
Article
Engineering, Mechanical
Feng-Chun Hsia, Fiona M. Elam, Daniel Bonn, Bart Weber, Steve E. Franklin
Summary: The research found that specific ploughing tracks on the flat corresponded to individual asperities on the sphere, leading to lower, more stable friction behavior and mild wear when these asperities were worn-off. It was also discovered that single asperity contact simulations are unreliable in predicting multi-asperity friction and wear behavior for this system.
TRIBOLOGY INTERNATIONAL
(2021)
Article
Engineering, Mechanical
S. Sudhagar, Lokavarapu Bhaskara Rao
Summary: This study aims to predict the wear of unlubricated spur gears through the development of a mathematical model. Factors such as sliding distance, contact pressure, and the use of a pin are explored to assess the wear of the gears.
JOURNAL OF TRIBOLOGY-TRANSACTIONS OF THE ASME
(2022)
Article
Construction & Building Technology
Zolfaghar Zarei, Javad Sadeghi, Alireza Sarkar
Summary: In addition to air pollutants, cars, especially heavy vehicles, also cause noise and vibration problems. The speed and weight of heavy vehicles running over speed bumps and road surface irregularities are the main sources of induced vibrations, which annoys pedestrians and residents nearby. However, there is a lack of sufficient research on the effect of vehicle speed and bump height on vehicle-induced vibrations. To address this, a comprehensive theoretical and experimental study was conducted, developing a finite element model of the road and soil to analyze the vibration level based on vehicle speed and bump height. The study also resulted in a graph model to guide the design and construction of road speed bumps near sensitive buildings.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Engineering, Mechanical
Yankui Song, Ke Xiao, Guo Xiang
Summary: The novelty of this study lies in constructing an Entropy-based wear and fluid-solid-thermal (FST) coupled model for journal bearings, and revealing the transient interaction behavior between wear evolution and FST evolution during repeated starting and stopping. The wear rate is measured experimentally, and the contact temperature, friction coefficient and normal contact force are obtained from the validated FST model. Wear tests and numerical calculations are conducted to validate the predicted wear rate and investigate the time-varying wear and FST evolution of journal bearings.
Article
Engineering, Mechanical
Xin-long Liu, Xin Guan, Yuan Zhong, Qian Xiao, Yong Cao, Wu-lue Zhang, Song Zhang, Yi-ting Zheng, Ming-sheng Gao, Dao-yun Chen, Wen-bin Yang
Summary: Gaps in the conductor rail joints of intercity trains have an impact on current transmission and the wear of carbon skateboards. These gaps decrease the coefficient of friction, increase electrical contact resistance, and affect the wear rate of carbon skateboards.
Article
Engineering, Mechanical
Yuhang Wu, Conglin Dong, Xiuqin Bai, Chengqing Yuan
Summary: The study developed a new composite material by incorporating hexagonal boron nitride (h-BN) particles into a thermoplastic polyurethane (TPU) matrix, which exhibited excellent self-lubricating properties and reduced frictional excitation forces. The addition of h-BN particles effectively reduced the coefficient of friction, decreased fluctuation amplitude, enhanced wear resistance, and attenuated vibration behaviors.
Article
Engineering, Mechanical
Tiancheng Ouyang, Xiuyang Sun, Wentao Tang, Yinxuan Li, Zhi Qun Tian, Yanzhou Li
Summary: By adding nitrogen-doped graphene and C60 nanoparticles to the lubricant, a highly efficient nano-lubricant with vibration and noise reduction properties is synthesized.
Article
Engineering, Mechanical
Xin Zhuo, Jun Cao, Haibo Huang, Li Liu, Xinkun Suo, Peiqing Ye, Zeshan Abbas
Summary: A polymer coating prepared by liquid spraying technology on the surface of 20CrMo steel demonstrates good tribological and anti-cavitation erosive properties. It can effectively replace CuPb24Sn copper alloy in valve plates for pumps under different lubrication conditions. The coating exhibits adhesive wear and reduces frictional loss, and mainly shows abrasive wear under complex working conditions. Its lipophilicity, high hardness to elastic modulus ratio, and corrosion resistance are the main influencing factors for its performance.
Article
Engineering, Mechanical
Md. Aminul Islam, Jiaren (Jimmy) Jiang, Yongsong Xie
Summary: Erosion-corrosion is a major factor in material loss and reduced useful life of hydro-transport equipment. This study evaluates the erosion-corrosion characteristics of different materials and finds that matrix wear affects the degradation of carbides. Sufficient wear and corrosion resistance in the surrounding matrix are important for good erosion-corrosion resistance.
Article
Engineering, Mechanical
Andre Dubois, Oussama Filali, Laurent Dubar
Summary: This study investigates the effect of surface roughness, contact pressure, and lubrication on the onset of galling in aluminum 6082-T6 using a pin-on-plate tribometer. The experimental results show that the roughness and lubricants play a significant role in preventing galling.
Article
Engineering, Mechanical
Jizhan Wu, Peitang Wei, Guoqiang Liu, Difa Chen, Xiuhua Zhang, Taimin Chen, Huaiju Liu
Summary: This study conducted a comprehensive evaluation of the DLC coating treatment on the loading capacity of gears and characterized the surface features and fatigue performance. The results demonstrate that DLC coating significantly improves the hardness and surface residual compressive stress of the gears, as well as enhances their contact fatigue performance.
Article
Engineering, Mechanical
Yangping Liu, Hwaran Lee, Annsley Mace, Jeremy L. Gilbert
Summary: An AFM-based single asperity tribology method was used to investigate the wear performance of carbides and base metal matrix in high carbon CoCrMo alloy. The wear behavior of the two types of carbides was stress-dependent and influenced by chemical composition. Cr-rich carbides exhibited higher wear resistance compared to Mo-rich carbides.
Article
Engineering, Mechanical
Zdenek Riha, Michal Zelenak, Akash Nag, Jakub Poloprudsky, Tomas Kruml, Sergej Hloch
Summary: This study investigates the erosion performances of a high-speed modulated jet (MWJ) and continuous water jet (CWJ). By comparing different nozzles and water jet powers, the effects of modulated and continuous jets on aluminum alloy were studied. The results show that under certain conditions, modulated jet can create deeper and sharper grooves while reducing the impact of lateral flow.
Article
Engineering, Mechanical
Chunyu Yu, Weipu Li, Yang Guo, Xianbin Sun, Fanli Hong, Ning Sun, Qinghai Zhang
Summary: This study explores the relationship between the wear rate of train brake pads and its features, and proposes a method for predicting the wear rate suitable for small sample data. Grey relational analysis and Pearson correlation analysis are used to determine the preferred features that affect the wear rate, and a BOA-BP model is established for prediction. The results show that BOA-BP exhibits better advantages in prediction with small samples.
Article
Engineering, Mechanical
Shan Yin, Xin Zhao, Shuangchao Huang, Zefeng Wen, Xuesong Jin
Summary: This study simulated the rolling contact of a driving wheelset over tangent and curved tracks at a speed up to 500 km/h using an explicit finite element approach to derive creep curves. The comparison between quasi-steady curves and transient curves in the presence of rail corrugation helped to identify cases where traditional theories are inapplicable and where transient effects must be considered. Additionally, the study further analyzed the influence of middle/high-frequency vibrations in the presence of rail corrugation.
Article
Engineering, Mechanical
Jiyao Zhang, Yuanlie Yu, Junlei Tang, Yingying Wang, Honggang Sun, Kaikai Song, Jianhong Gong, Pingping Liu, Xiaoming Liu, Lina Hu, Parthiban Ramasamy, Juergen Eckert
Summary: The influence of high-carbon addition on the microstructure, hardness, and wear behavior of CoCrNi alloy was investigated. It was found that the addition of carbon resulted in the formation of carbide particles, enhancing the hardness and improving the wear resistance. Fracture and detachment of hard carbides during friction introduced additional abrasive particles, transitioning the wear mechanism from adhesive-dominated to abrasive-dominated.
Article
Engineering, Mechanical
Yanfei Liu, Shengtao Yu, Ruize Zhang, Xiangyu Ge, Wenzhong Wang
Summary: This study reports the tribological behavior of nanodiamond plate (NDPL) as a nanoadditive for the first time and compares it with nanodiamond particles (NDPA). The results show that NDPL provides better lubrication performance at higher concentrations, and the sliding between NDPLs and the structural transformation from sp3 to sp2 carbon play a crucial role in lubrication and wear resistance.