Article
Engineering, Mechanical
Radovan Galas, Simon Skurka, Martin Valena, Daniel Kvarda, Milan Omasta, Haohao Ding, Qiang Lin, Wen-jian Wang, Ivan Krupka, Martin Hartl
Summary: This study designs a benchmarking methodology using a standard tribometer to investigate the performance of top-of-rail products. The methodology allows for assessment of performance from multiple perspectives and divides the products into four performance classes.
TRIBOLOGY INTERNATIONAL
(2023)
Article
Engineering, Civil
Koichi Kajiwara, Yusuke Tosauchi, Jae-Do Kang, Kunio Fukuyama, Eiji Sato, Takahito Inoue, Toshimi Kabeyasawa, Hitoshi Shiohara, Takuya Nagae, Toshikazu Kabeyasawa, Hiroshi Fukuyama, Tomohisa Mukai
Summary: The paper presents results from shaking-table tests of a full-scale 10-story reinforced-concrete structure with a base that permits sliding and uplifting. The system aims to utilize the seismic resistance of the structure during small or medium earthquakes and the sliding and uplifting behavior during large earthquakes. The tests demonstrated that allowing sliding and uplifting behavior can reduce building damage in extremely large earthquakes.
ENGINEERING STRUCTURES
(2021)
Article
Engineering, Mechanical
Esteban Bernal, Maksym Spiryagin, Qing Wu, Chris Bosomworth, Ben Sneath, Colin Cole
Summary: This paper proposes a methodology to improve the accuracy of wear analyses of locomotive-track interaction by using dynamic simulations. The proposed method considers in-train forces and utilizes a co-simulation approach to implement simulation results on a detailed locomotive vehicle dynamic model. The wheel-rail contact stress and slip results are then processed into a Dynamic Load Spectrum. Experimental measurements using this method provided more realistic wear rates, allowing for accurate estimation of rail material volume loss.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2023)
Article
Multidisciplinary Sciences
Corbin M. Rasmussen, Carolin Curtze, Mukul Mukherjee, Nathaniel H. Hunt
Summary: This study investigated the influence of curvilinear walking on slip perturbations, including slip onset phase, slipped foot position relative to the path, and path radius. The results showed that slip direction, distance, and velocity were influenced by these factors. These findings contribute to a better understanding of walking slips and can inform slip prevention methods.
SCIENTIFIC REPORTS
(2022)
Article
Chemistry, Multidisciplinary
Pengcheng Liu, Jun Liu, Song Gao, Yue Wang, Haowen Zheng, Mengyang Zhen, Futian Zhao, Zheng Liu, Chen Ou, Ruihong Zhuang
Summary: The sliding friction behavior of granular geomaterials is a challenging problem in the discrete element method (DEM) analysis. In this study, experiments were designed to determine the sliding friction coefficient between particles of different shapes and contact forms, as well as between particles and different boundaries. The experimental results were fitted and embedded into DEM software, and the simulated results showed high consistency with the experimental results. The proposed experiment method can determine the sliding friction coefficient in DEM simulation and improve the accuracy of the simulation results.
APPLIED SCIENCES-BASEL
(2023)
Article
Engineering, Mechanical
Simon Skurka, Radovan Galas, Milan Omasta, Bingnan Wu, Haohao Ding, Wen-Jian Wang, Ivan Krupka, Martin Hartl
Summary: This study investigated the impact of water contamination on the performance of top-of-rail products using a laboratory tribometer. The results showed that water significantly influenced the performance of oil-based top-of-rail products, potentially leading to traction issues on actual railways. However, water-based top-of-rail products exhibited more resistance to water contamination.
TRIBOLOGY INTERNATIONAL
(2023)
Article
Engineering, Mechanical
Xiangyun Deng, Yi-Qing Ni, Xiubo Liu
Summary: This study uses a validated finite element method to evaluate the wheel-rail slip behaviors and focus on the contact during wheel traction. The factors affecting wheel slips, such as friction and traction coefficients, are investigated. The study reveals that wheel slips can occur even when the traction coefficient is slightly smaller than the limiting value. The study provides insights into the wheel slip mechanism and theoretical guidance for the development of more accurate control methods.
JOURNAL OF TRIBOLOGY-TRANSACTIONS OF THE ASME
(2022)
Article
Engineering, Civil
Daniel Kvarda, Radovan Galas, Milan Omasta, Martin Hartl, Ivan Krupka, Marian Dzimko
Summary: In this study, the friction-displacement properties of three types of top-of-rail products were investigated using a high-pressure torsion device. The results showed that the tested products were highly sensitive to the applied amount and that the increase in temperature had a negligible effect on the applied products.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART F-JOURNAL OF RAIL AND RAPID TRANSIT
(2023)
Article
Engineering, Geological
Amir Ali, Chunwei Zhang, Tayyaba Bibi, Limeng Zhu, Liyuan Cao, Chunxiang Li, Po-Chien Hsiao
Summary: This study involved the fabrication and testing of isolation layers using low-cost materials for enhanced seismic capacity. Through analysis, experimentation, and numerical validation, it was found that rubberized mortar is a feasible material for the isolation layer, resulting in a significant reduction in top floor acceleration response.
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2022)
Article
Engineering, Mechanical
Xiaolu Cui, Zhiqiang He, Bo Huang, Yuanchang Chen, Zixue Du, Wei Qi
Summary: This paper focuses on the effects of wheel-rail friction self-excited vibration and feedback vibration of corrugated irregularity on rail corrugation. The results show that both wheel-rail friction-induced vibration and feedback vibration of corrugated irregularity may affect the development of rail corrugation. Moreover, factors such as the friction coefficient, corrugation depth, and corrugation wavelength have different effects on the development of rail corrugation.
Article
Construction & Building Technology
Renzhang Yan, Chunling Yan, Shuai Wang, Chongsheng Cheng, Ting Liu, Hongbo Liu
Summary: This study establishes a friction-slip test model and a refined numerical model based on the twisting characteristics of the cable to investigate the contact behavior between cable wires and joint during the tensioning process. The study finds that the stress distribution of the cable is non-uniform, revealing the contact working mechanism of the cable-joint pair. The cable included angle, tensile force, and lay length have an effect on the coefficient of sliding friction.
INTERNATIONAL JOURNAL OF STEEL STRUCTURES
(2023)
Article
Engineering, Mechanical
L. Biazon, B. P. Ferrer, A. Toro, T. Cousseau
Summary: Twin disc tests were used to evaluate the impact of different rail grease formulations on friction, wear, and retentivity, showing that thickener type and base oil viscosity play crucial roles in determining the performance of rail greases.
TRIBOLOGY INTERNATIONAL
(2021)
Article
Engineering, Mechanical
Mohammad Lutfar Rahaman, Esteban Bernal, Maksym Spiryagin, Chris Bosomworth, Ben Sneath, Qing Wu, Colin Cole, Tim McSweeney
Summary: This study investigates the effect of slip rate on the traction coefficient of the wheel/rail interface under replicated tribological and locomotive operating conditions using a twindisc machine. The results show that the traction coefficient decreases as the slip rate increases. The interface materials have less time to accumulate strain hardening under a faster slip rate, resulting in a smaller increase in surface hardness. The shorter running-in period under a higher slip rate indicates that the surface micro-geometry of the interface materials reaches a steady state faster. The findings of this research can be valuable for improving locomotive traction control systems and enhancing the safety and maintenance efficiency of railway operations.
TRIBOLOGY INTERNATIONAL
(2023)
Article
Engineering, Mechanical
Borja Rodriguez-Arana, Albi San Emeterio, Maria Panera, Alicia Montes, David Alvarez
Summary: This study investigated creepage phenomena and found a linear correlation between wear and the slip area, which helps in calculating very low creepages at the wheel-rail contact area.
TRIBOLOGY INTERNATIONAL
(2022)
Article
Transportation Science & Technology
Yu Pan, Ahmad Radmehr, Mehdi Ahmadian
Summary: This study evaluates the effect of top-of-rail friction modifiers (TORFM) on wear and adhesion under field-like conditions. Results show that light applications of TORFM offer the best wear-to-cost ratio, while repeated moderate applications can lead to a stick-slip phenomenon and surface markings on the rail.
INTERNATIONAL JOURNAL OF RAIL TRANSPORTATION
(2023)
Article
Engineering, Electrical & Electronic
Patrik Jonsson, Johan Casselgren, Benny Thornberg
IEEE SENSORS JOURNAL
(2015)
Article
Optics
Lavan Kumar Eppanapelli, Benjamin Friberg, Johan Casselgren, Mikael Sjodahl
OPTICS AND LASERS IN ENGINEERING
(2016)
Article
Optics
Johan Casselgren, Sara Rosendahl, Mikael Sjodahl, Patrik Jonsson
OPTICS AND LASERS IN ENGINEERING
(2016)
Article
Engineering, Electrical & Electronic
Johan Casselgren, Ulf Bodin
IET INTELLIGENT TRANSPORT SYSTEMS
(2017)
Article
Optics
Lavan Kumar Eppanapelli, Johan Casselgren, Johan Wahlin, Mikael Sjodahl
OPTICS AND LASERS IN ENGINEERING
(2017)
Article
Engineering, Environmental
Lavan Kumar Eppanapelli, Nina Lintzen, Johan Casselgren, Johan Wahlin
JOURNAL OF COLD REGIONS ENGINEERING
(2018)
Article
Engineering, Mechanical
Nicholas Dittes, Anders Pettersson, Mikael Sjodahl, Johan Casselgren, Par Marklund, Piet M. Lugt
TRIBOLOGY TRANSACTIONS
(2018)
Article
Chemistry, Physical
Lavan Kumar Eppanapelli, Fredrik Forsberg, Johan Casselgren, Henrik Lycksam
Article
Chemistry, Analytical
Muhammad Saad Shaikh, Keyvan Jaferzadeh, Benny Thornberg, Johan Casselgren
Summary: This study presents a hyper-spectral imaging system for measuring road conditions, using a low-cost calibration reference to measure relative reflectance of any material surface independent of spectral distribution and camera sensitivity. Results show that the acquired spectral data can effectively differentiate different road conditions, demonstrating the system's suitability for material classification.
Article
Chemistry, Multidisciplinary
Mahshid Hatamzad, Geanette Cleotilde Polanco Pinerez, Johan Casselgren
Summary: This paper investigates the accurate prediction of salt quantity for winter road maintenance using a deep neural network, showing its effectiveness and efficiency.
APPLIED SCIENCES-BASEL
(2022)
Article
Computer Science, Artificial Intelligence
Mahshid Hatamzad, Geanette Cleotilde Polanco Pinerez, Johan Casselgren
Summary: This study proposes an intelligent methodology that combines data envelopment analysis and machine learning techniques to predict the efficiency of winter road maintenance and achieve efficient and effective maintenance through road surface temperature prediction.
KNOWLEDGE-BASED SYSTEMS
(2022)
Article
Public, Environmental & Occupational Health
Mahshid Hatamzad, Geanette Polanco Pinerez, Johan Casselgren
Summary: Designing an accurate prediction model for road surface friction coefficient is a key challenge in developing efficient and effective winter road maintenance. This study uses an adaptive neuro-fuzzy inference system to address uncertainties and demonstrates the excellent ability of the proposed model to predict the road surface friction coefficient through real data validation.
Article
Computer Science, Information Systems
Mahshid Hatamzad, Geanette Polanco Pinerez, Johan Casselgren
Summary: Efficiency prediction in winter road maintenance (WRM) is crucial for road transportation safety and cost reduction in cold climate countries. This study presents a classification prediction model combining data envelopment analysis and machine learning techniques to classify decision-making units into efficient and inefficient classes. Results show that utilizing a support vector machine and genetic algorithm combination yields the best generalization performance.
Article
Engineering, Industrial
Johan Odelius, Stephen Mayowa Famurewa, Lars Forslof, Johan Casselgren, Heikki Konttaniemi
JOURNAL OF QUALITY IN MAINTENANCE ENGINEERING
(2017)
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.