Article
Engineering, Mechanical
Chenwei Miao, Zhiwei Guo, Chengqing Yuan
Summary: This study investigates the tribological behavior of cylinder liner-piston rings (CLPRs) during running-in, by applying different types of surface textures and characterizing the performance based on parameters such as friction coefficient, contact resistance, and wear topography. Experimental results demonstrate that textured surfaces improved friction performance during running-in compared to non-textured surfaces, while exhibiting differences in lubricant supply capacity and wear resistance. The co-texture shows a combination of advantages from dimples and groove textures, providing guidance for the design and manufacturing of CLPRs in marine diesel engines.
Article
Engineering, Mechanical
Jianxiong Kang, Yanjun Lu, Xinliang Yang, Xiaowei Zhao, Yongfang Zhang, Zhiguo Xing
Summary: The tribological property of piston ring and cylinder liner plays a significant role in the exhaust emissions and service performance of internal combustion engines. This study investigates the effects of surface topography on the tribological property of coated piston ring and honed cylinder liner. The established contact and wear models, considering the non-Gaussian property of rough surfaces and the degradation rate of oil, provide insights into the change characteristics of the wear process, coefficient of friction, and roughness. The tribological test confirms the validity of the proposed models and demonstrates that reasonable surface parameters can enhance the anti-wear performance of the system during the running-in process.
TRIBOLOGY INTERNATIONAL
(2022)
Article
Electrochemistry
Il-Cho Park, Seong-Jong Kim
Summary: The damage characteristics of a hard chromium plating layer on a diesel engine cylinder liner under cavitation erosion were analyzed. It was found that the plating layer showed localized damage in the form of micro-tunnels on its surface, with an increasing depth and weight loss. This local damage was observed to occur and grow first in the spherical grain microstructure of the plating layer.
TRANSACTIONS OF THE INSTITUTE OF METAL FINISHING
(2022)
Article
Thermodynamics
Jamshid Malekmohammadi Nouri, Ioannis Vasilakos, Youyou Yan
Summary: The new optical engine design successfully produced high-quality images of lubricant flow, cavitation formation, and development at different engine speeds and lubricant temperatures. Results showed that in-cylinder pressure and lubricant temperatures had significant effects on cavitation formation and distribution. Increasing the engine speed also impacted the extent of cavitation, with a notable increase in cavitation area as the speed increased.
INTERNATIONAL JOURNAL OF ENGINE RESEARCH
(2022)
Article
Mechanics
A. Waseem, T. Heuze, L. Stainier, M. G. D. Geers, V. G. Kouznetsova
Summary: This paper addresses the two-scale problem of the enriched continuum for transient diffusion problems, proposing a model reduction at the micro-scale and presenting distinct solution methods for the macro-scale enriched continuum through different discretization techniques. Results from the enriched continuum formulation are compared with computational transient homogenization and direct numerical simulations, showing significant computational gains without compromising solution accuracy.
EUROPEAN JOURNAL OF MECHANICS A-SOLIDS
(2021)
Article
Automation & Control Systems
M. G. Todorov, F. O. dos Santos, C. C. Graciani Rodrigues
Summary: This paper studies the mean stability and L-infinity performance of continuous-time Positive Markov Jump Linear Systems (PMJLS). The unique aspect of this approach is the consideration of a two-time-scale Markov chain and the singular perturbation setup. The analysis involves the semigroup dynamics of the system state and establishes the homogenized notions of stability and L-infinity performance, which can be connected with linear programming methods.
JOURNAL OF THE FRANKLIN INSTITUTE-ENGINEERING AND APPLIED MATHEMATICS
(2022)
Article
Engineering, Multidisciplinary
Dong Liu, Nannan Sun, Guixiang Zhu, Hengchao Cao, Tie Wang, Guoxin Li, Fengshou Gu
Summary: This study investigates the correspondence between cylinder liner vibration and coolant pressure through vibration cavitation tests, pressure gradient calculations, and visualization observations. The cavitation risk under piston slap is quantitatively analyzed based on a nonlinear structural dynamics model, showing a high risk when the cylinder liner acceleration exceeds 1189 m/s2. The variation in cavitation risk for each cylinder is related to the structural modal characteristics of the crankcase, and the effects of piston-liner clearance and piston pin offset on cavitation risk are also explored.
EKSPLOATACJA I NIEZAWODNOSC-MAINTENANCE AND RELIABILITY
(2023)
Article
Materials Science, Multidisciplinary
Chengdi Li, Xiao Chen, Hao Liu, Lianjie Dong, Huihua Jian, Jingsi Wang, Fengming Du
Summary: This paper discusses the tribological performance and scuffing resistance of Al-Si alloy cylinder liners and cast-iron cylinder liners to determine their applicable working conditions. The wear mechanism of cast-iron cylinder liners is slight adhesive wear, making them suitable for traditional fuel engines and turbocharged engines. On the other hand, the wear mechanism of Al-Si alloy cylinder liners involves a mixture of adhesive wear and abrasive wear, making them suitable for lightweight, efficient, energy-saving engines operating at high speeds.
Review
Engineering, Mechanical
P. Pawlus, R. Reizer
Summary: This paper discusses the significant role of honed cylinder surface in reducing friction losses in internal combustion engine. The tribological impacts of honed cylinder liners are discussed based on the experiences of the authors and a review of the literature. The methods for describing honed cylinder liners and assessing low cylinder wear are presented.
TRIBOLOGY INTERNATIONAL
(2022)
Review
Chemistry, Physical
Pawel Pawlus, Waldemar Koszela, Rafal Reizer
Summary: This work discusses the tribological impacts of textured cylinder liner surfaces on engine performance, showing that surface texturing can reduce friction and wear, decrease fuel consumption, and increase power and torque. Future challenges include considerations of the lubricant reservoir in surface topography.
Article
Acoustics
Jianxin Zheng, Yonglei Guo, Lixin Zhu, Hanlin Deng, Yingju Shang
Summary: The ultrasonic cavitation effect has been found to improve machining quality through simulation and experimental studies. Particularly, the cavitation effect generated in the two-dimensional ultrasonic rolling process has a positive impact on processing quality.
Article
Engineering, Marine
Fadong Gu, Yadong Huang, Desheng Zhang
Summary: This paper investigates the cavitation characteristics in the wake of a circular cylinder with multiscale vortices using Large Eddy Simulation (LES). It is found that cavitation can inhibit vortex shedding and induce the merging or splitting of cavities in the wake. The study provides insights into the interaction between cavitation and vortices in fluid dynamics.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2021)
Article
Engineering, Mechanical
Jianxiong Kang, Yanjun Lu, Bin Zhao, Cheng Jiang, Pengzhou Li, Hongbo Luo, Yongfang Zhang
Summary: The tribological properties of the cylinder liner are crucial in reducing energy loss in an internal combustion engine. This study investigates the friction and wear of the cylinder liner during running-in process to improve its antiwear performance. The coefficients of friction, surface roughness, and profile are analyzed using a multifunction friction wear tester and a confocal microscope. The results show that the coefficients of friction decrease with increased lubrication oil and load, and the surface profile becomes smoother under dry conditions. Real-time prediction of the coefficients of friction is achieved using the polynomial fitting method.
MECHANICAL SCIENCES
(2022)
Article
Mechanics
Weixuan Zhou, Xiaofeng Wei, Gaston Haidak, Dongyun Wang
Summary: In this paper, the dynamics of the textured piston/cylinder pairs are predicted using the Reynolds equation coupled with the Half-Sommerfeld boundary condition, and the optimal geometry parameters are predicted using the characteristic function. The combination of the shearing coefficient and the characteristic function can predict the cavitation region and the critical inclination angle. The results of this paper provide theoretical guidance for the surface texture design on piston/cylinder pairs.
Article
Thermodynamics
A. S. Lobasov, S. G. Skripkin, M. A. Tsoi, A. Y. Kravtsova
Summary: Numerical modeling and experimental investigation of hydrodynamic cavitation on a micro-cylinder located in a microchannel were conducted, showing stable developed cavitation within a certain range of inlet pressures. The presence of cavitation was found to shift the frequency of hydrodynamic pulsations towards larger values.
CASE STUDIES IN THERMAL ENGINEERING
(2022)
Article
Mechanics
Xianghui Meng, Chunxing Gu, Youbai Xie
Article
Engineering, Mechanical
Changya Yu, Xianghui Meng, Youbai Xie
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART J-JOURNAL OF ENGINEERING TRIBOLOGY
(2017)
Article
Engineering, Mechanical
Yang Hu, Xianghui Meng, Youbai Xie, Jiazheng Fan
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART J-JOURNAL OF ENGINEERING TRIBOLOGY
(2017)
Article
Engineering, Mechanical
Chunxing Gu, Xianghui Meng, Youbai Xie
TRIBOLOGY TRANSACTIONS
(2017)
Article
Engineering, Mechanical
Yang Hu, Xianghui Meng, Youbai Xie, Jiazheng Fan
INDUSTRIAL LUBRICATION AND TRIBOLOGY
(2017)
Article
Engineering, Mechanical
Congcong Fang, Xianghui Meng, Xiaoli Kong, Bo Zhao, Hongchen Huang
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2017)
Article
Engineering, Mechanical
Chunxing Gu, Xianghui Meng, Di Zhang, Youbai Xie
JOURNAL OF TRIBOLOGY-TRANSACTIONS OF THE ASME
(2017)
Article
Engineering, Mechanical
Ruichao Liu, Xianghui Meng, Peng Li
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART J-JOURNAL OF ENGINEERING TRIBOLOGY
(2018)
Article
Engineering, Mechanical
Chunxing Gu, Xianghui Meng, Di Zhang, Youbai Xie
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART J-JOURNAL OF ENGINEERING TRIBOLOGY
(2017)
Article
Engineering, Mechanical
Xianghui Meng, Changya Yu, Youbai Xie, Benfu Mei
INDUSTRIAL LUBRICATION AND TRIBOLOGY
(2018)
Article
Engineering, Mechanical
Chengwei Wen, Xianghui Meng, Wenxiang Li
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART J-JOURNAL OF ENGINEERING TRIBOLOGY
(2018)
Article
Engineering, Mechanical
Rui Li, Xianghui Meng, Youbai Xie
TRIBOLOGY INTERNATIONAL
(2018)
Article
Engineering, Mechanical
Xianghui Meng, Congcong Fang, Ke Niu
TRIBOLOGY INTERNATIONAL
(2018)
Article
Engineering, Mechanical
Yang Hu, Xianghui Meng, Youbai Xie
TRIBOLOGY INTERNATIONAL
(2018)
Article
Engineering, Mechanical
Congcong Fang, Xianghui Meng, Youbai Xie, Chengwei Wen, Ruichao Liu
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2019)
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.