Article
Engineering, Mechanical
Bhaskaranand Bhatt, Navnath Kalel, Ashish Darpe, Jayashree Bijwe
Summary: This study evaluated the noise and vibration performance of pads based on PD compared to non-PD based ones, finding that increasing the PD content significantly improves brake NV performance. Pads with 20 wt.% PD performed best in both noise and vibration aspects, indicating that 20 wt.% PD can be used to enhance the NV performance of brake pads and increase friction levels.
Article
Chemistry, Physical
Kevin Lontin, Muhammad Khan, Bander Alharbi
Summary: This study evaluates the accuracy of a model for describing the relationship between wear and airborne noise at higher temperatures. The results show that the errors of the model increase at higher temperatures, but the increase in sound pressure error is smaller. The assumptions made in the initial model are more significant at higher temperatures, leading to larger errors in wear.
Article
Engineering, Mechanical
Dae-Hyun Cho, Young-Sung Kim, Young-Ze Lee
Summary: This study investigated the tribological characteristics of magnetized materials. The tribological properties of magnetized samples were compared considering their different coating conditions, and the wear amount was measured to evaluate the specimens' tribological characteristics. The results showed that the magnetic field significantly influenced the wear and friction properties, as it promoted the formation of an oxidative transfer layer and reduced debris production. These findings can be used to assess the reliability of mechanical components exposed to a magnetic field.
Article
Materials Science, Multidisciplinary
H. Celik, H. Kovaci
Summary: The current investigation aims to understand the impact of magnetic field and surface treatments on the friction and wear behavior of machine elements. The sequential application of shot peening and plasma nitriding can increase the material's wear resistance. Magnetic field application further enhances the wear resistance but does not change the wear mechanisms of the samples.
MATERIALS TODAY COMMUNICATIONS
(2023)
Review
Engineering, Mechanical
Kevin Lontin, Muhammad Khan
Summary: This review paper analyzes the interdependencies of friction, wear, and noise in mechanical contacts at an asperitical level, emphasizing the lack of research in this area in existing literature and the need for a comprehensive mathematical modeling approach.
Article
Engineering, Mechanical
Sufyan Akram, Anatolii Babutskyi, Andreas Chrysanthou, Diogo Montalvao, Mark J. Whiting, Om Prakash Modi
Summary: The study has shown that magnetic treatment of EN8 medium-carbon steel can significantly reduce the coefficient of friction and wear rate, as well as decrease surface roughness and wear scar width. These improvements are attributed to increased dislocation mobility and migration to the surface, leading to increased Vickers microhardness and compressive residual stresses at the surface.
Article
Engineering, Mechanical
Mohsen Amjadian, Anil K. Agrawal, Christian E. Silva, Shirley J. Dyke
Summary: This paper focuses on characterization testing and validation of the dynamic model of a new type of high-damping density electromagnetic-based damping device referred to as Magneto-Solid Damper (MSD). The proposed MSD consists of a ferromagnetic plate, copper plates, and permanent magnets, with eddy current damping and solid friction mechanisms. Experimental and analytical models were used to analyze the magnetic interaction between the components, and a dynamic model was developed to characterize the force-displacement behavior of the MSD. Validation tests under real ground motion records confirmed the accuracy of the dynamic model in describing the force-displacement behavior under various operating conditions.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2022)
Article
Engineering, Mechanical
Q. A. Liu, Z. Y. Xiang, J. L. Mo, Q. X. Zhang, Y. G. Zhu
Summary: Experimental and numerical analysis have shown that the structural stiffness of transfer path has a significant effect on friction-induced vibration and noise (FIVN). Low and high stiffness systems are prone to generate strong FIVN, while moderate structural stiffness exhibits better FIVN performance.
TRIBOLOGY INTERNATIONAL
(2022)
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
Qiangqiang Zhang, Hui Song, Bo Wu, Weimin Feng, Xiangyang Li, Yan Jiao, Xianguo Hu
Summary: A magnetic lubricating particle, Fe3O4@MoS2 core-shell nanocomposite, was developed as a solid additive for polyalphaolefin (PAO) 6, and a magnetic field was applied to enhance lubrication effect. Results show that the friction reduction and anti-wear effect of the nanocomposites in PAO 6 could be further improved after applying a magnetic field.
Article
Engineering, Mechanical
Z. Y. Xiang, W. Chen, J. L. Mo, Q. A. Liu, Z. Y. Fan, Z. R. Zhou
Summary: This study investigates the influence of different shapes of friction blocks on the performance of high-speed train brake systems. Results show that hexagonal friction blocks have a more uniform contact pressure distribution, leading to reduced wear, vibration, and noise.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2021)
Article
Engineering, Mechanical
Shunchu Liu, Qingyi Sai, Shuwen Wang, John Williams
Summary: The study shows that laser surface textures can reduce the coefficients of friction, enhance wear resistance, and improve the dynamical performance of frictional surfaces. The surface with micro circular dimples in diameter of 150 mu m or textured area density of 25% has the best tribological and dynamical performance. Adding graphene to the lubrication oil effectively reduces frictional vibrations and noise, and surface textures enhance the frictional noise reduction performance of lubrication.
Article
Engineering, Mechanical
Jongsung Park, Byungsoo Joo, Hyungjo Seo, Wansu Song, Jung Ju Lee, Wan Kyu Lee, Ho Jang
Summary: Brake emissions from commercial brake pads were investigated to understand the mechanism of airborne particle generation. The emission factor and particle number concentration were found to be significantly different between low-steel and non-steel brake pads. The size distribution of particles was influenced by the surface topography of the brake pads.
Article
Acoustics
G. Corradi, J-J Sinou, S. Besset
Summary: This paper presents an efficient reduction method for predicting nonlinear transient and steady state squeal events in mechanical systems, focusing on the Double Modal Synthesis (DMS) method. The study investigates the performance and convergence of the DMS method in predicting various aspects of squeal events.
Article
Chemistry, Physical
Xiangdong Chang, Yuxing Peng, Zhencai Zhu, Hao Lu, Wei Tang, Xing Zhang
Summary: This study investigated the friction and wear behavior between wire rope and sheave under long-distance transmission conditions. The results showed that the sliding velocity had a significant impact on the COF, temperature rise, wear characteristics, and wear mechanisms of the wire rope. The study also found that surface wear affected the fracture behavior of the wire rope.
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.