Article
Engineering, Mechanical
Tongyang Li, Xiaotong Zhu, Huaguo Tang, Baofeng Zhang, Lujie Wang, Yuan Yu, Zhuhui Qiao, Xuan Ma
Summary: This study proposes a new method for determining the lubrication regime in the piston ring-cylinder liner tribosystem based on comparing oil film thickness with critical values using characteristic topo-graphic parameters. The method can classify the lubrication regime into hydrodynamic, micro-plasto-elastohydrodynamic, micro-plastohydrodynamic, thin film, boundary, or mixed lubrication. The influence of thermal effects and oil-feed conditions on the lubrication regime is also discussed.
TRIBOLOGY INTERNATIONAL
(2023)
Article
Engineering, Mechanical
Ajith Kurian Baby, P. K. Rajendrakumar, Deepak K. Lawrence
Summary: This paper investigates the influence of honing angle on the friction characteristics of the cylinder liner surface. The experimental results indicate that 40 degrees is the optimal honing angle.
TRIBOLOGY INTERNATIONAL
(2022)
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)
Article
Engineering, Mechanical
Bjorn Michelberger, Dirk Jaitner, Andreas Hagel, Patrick Striemann, Benjamin Kroeger, Andreas Leson, Andres Fabian Lasagni
Summary: An innovative method using a new reciprocating long-stroke tribometer at component level and a new elastohydrodynamic simulation model enable investigation of a greater range of operating conditions in combustion engines. Results show a quantifiable distinction between investigated tribological systems and a high correlation between measured friction results and simulation, allowing for further parameter studies of reciprocating contacts.
TRIBOLOGY INTERNATIONAL
(2021)
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
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.
Article
Engineering, Mechanical
L. J. Oestringer, C. Proppe
Summary: This paper presents a transient thermomechanical contact model for two sliding bodies with rough surfaces. By solving the underlying equations for mechanical, thermal, and thermoelastic submodels, dimensionless influence functions for a loaded rectangular element on a halfspace are derived. The submodels are then combined into one thermomechanical simulation model, coupling the heat flux to the frictional power without using a prescribed friction coefficient. The solution process is described in detail. Calculations are performed for two nominally flat but periodic rough surfaces, and the obtained transient friction coefficient is discussed in particular.
TRIBOLOGY INTERNATIONAL
(2022)
Article
Chemistry, Physical
Markus Soderfjall, Carsten Gachot
Summary: Applying texture to the surface of a tribological interface can have an impact on frictional performance. However, there is limited research on the influence of texture on friction under lubricated sliding conditions, especially at high sliding speeds. This study experimentally investigates the effect of texture on frictional losses between the piston ring and cylinder liner. The results show a clear reduction in frictional losses with the textured cylinder liner, and there is good correlation between the experimental results and a numerical model.
Article
Materials Science, Multidisciplinary
Shailesh Kumar Singh, Somnath Chattopadhyaya, Alokesh Pramanik, Sanjeev Kumar, Shailesh M. Pandey, R. S. Walia, Shubham Sharma, Aqib Mashood Khan, Shashi Prakash Dwivedi, Sunpreet Singh, Szymon Wojciechowski
Summary: The study aims to evaluate and enhance the tribology of CrN coated disc and cylindrical lining pin using Al2O3 additives. The tribological characteristics are significantly improved by blending nano-particles with lubricating oils. Response Surface Methodology is implemented for optimization analysis, resulting in the optimal values of wear rate and friction coefficient. The wear mechanism of the CrN coating is analyzed using FE-SEM and EDS. The use of Al2O3 nano-particles has been found to prolong the lifespan performance of automotive parts.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Engineering, Mechanical
Dohyung Kim, Sejin Jung, Jinkee Lee
Summary: The tribological interaction between patterned running surfaces and an ice track was investigated by analyzing the friction coefficient based on the patterned running surface type, ambient temperature, and rotational track velocity. The results were analyzed in terms of the structural characteristics of the patterned running surface and the water layer generated on it. It was found that the water layer acted as either a lubricant or a source of frictional resistance depending on the water layer ratio and the type of patterned running surfaces.
TRIBOLOGY INTERNATIONAL
(2022)
Article
Engineering, Mechanical
Meenu Pandey, Divya Verma, Viswanath Balakrishnan, Nitya Nand Gosvami, J. P. Singh
Summary: The research revealed that patterned silver surfaces exhibit anisotropic friction behavior, with significant differences in coefficient of friction values when sliding in different directions on one-arm and two-arm nanocolumnar structures under varying normal load.
TRIBOLOGY INTERNATIONAL
(2021)
Article
Computer Science, Interdisciplinary Applications
Pantelis G. Nikolakopoulos
Summary: Engineers and engine manufacturers have long been aware that piston rings are a major source of friction in internal combustion engines, with up to 75% in some cases. The wear and deposition effects on piston rings as a result of poor lubrication can lead to increased oil consumption, emissions, reduced performance, and fuel economy. Through numerical methodologies, researchers have investigated the characteristics of ring deposits in a diesel engine and found that insufficient lubrication can result in thicker films, worst sealing behavior, and other detrimental effects.
SIMULATION MODELLING PRACTICE AND THEORY
(2021)
Article
Engineering, Mechanical
Xin Yu, Yunyun Sun, Shijing Wu
Summary: In this study, a generalized close-formed model of the friction coefficient between fractal surfaces in mixed lubrication is presented. A mathematical transformation from asperity area to oil film thickness is conducted to establish an analytical fractal model of oil film thickness. A dynamic film thickness model with external load under the determination of the surface roughness is proposed. The effects of fractal parameters and important working parameters on friction coefficient are analyzed, and comparison with experimental data is conducted. This work provides a general analytical expression for friction coefficient in mixed lubrication with explicit form and wide applications.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2023)
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
Engineering, Mechanical
Jie Li, Jialing Gu, Yanxiong Zhang, Zhiyong Wang, Guohong Zhang
Summary: This study used laser cladding process to prepare the cladding layer of copper-based friction materials and validated its friction performance in wet clutches through experiments and analysis. The results showed that the friction layer prepared by laser cladding technology had a compact structure and good wear resistance, which significantly reduced the wear rate of the friction pairs.
TRIBOLOGY INTERNATIONAL
(2023)
Article
Engineering, Multidisciplinary
Natalia Swojak, Michal Wieczorowski, Michal Jakubowicz
Summary: This paper presents experimental results on the static characteristics of laser triangulation sensors and their application in length measurement. Calibration, statistical analysis, and a mathematical model were used to determine the correct measurement values range and predict head features. Conclusions were drawn regarding the practicality of laser triangulation sensors in length metrology.
Article
Engineering, Mechanical
Slawomir Wos, Waldemar Koszela, Andrzej Dzierwa, Pawel Pawlus
Summary: The study investigated the effect of the apex angle of triangular oil pockets on friction on a disc surface. It was found that the apex angle significantly affected friction reduction, with the smallest coefficient of friction achieved for a disc with a 60-degree apex angle under lower normal load. Conversely, under higher normal load, a larger apex angle corresponded to a higher coefficient of friction.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART J-JOURNAL OF ENGINEERING TRIBOLOGY
(2022)
Article
Chemistry, Physical
Pawel Pawlus, Rafal Reizer, Michal Wieczorowski, Wieslaw Zelasko
Summary: This paper investigates two types of measurement errors in surface texture measurement: the impact of scratches on measurement results and the differences in measurements taken with a three-month break. The study finds that larger scratches result in larger measurement errors, while skewness and kurtosis are primarily affected by the presence of valleys. Additionally, spatial parameters are found to be the most stable measurement parameters.
Article
Chemistry, Physical
Alejandro Pereira, Diego Carou, Maria Fenollera, Teresa Prado, Bartosz Gapinski, Michal Wieczorowski
Summary: This research analyzed the geometry and surface topography of walls built under different conditions and inclination angles. The study found that travel speed and heat accumulation were important factors affecting the process efficiency. Additionally, intermediate cooling improved the uniformity of the structures.
Editorial Material
Chemistry, Physical
Michal Wieczorowski, Maxence Bigerelle, Chris Brown, Pawel Pawlus, Rafal Reizer, Alejandro Pereira
Article
Chemistry, Physical
Pawel Pawlus, Rafal Reizer, Michal Wieczorowski
Summary: Surface topography is difficult to characterize, and machined textured surfaces pose even greater challenges. The choice of parameters to describe these surfaces is still an open issue. Research has shown that parameters of random surfaces are more intercorrelated than those of surfaces with isolated dimples. Additionally, a pair of parameters (Sp/Sz and Sq/Sa) can better describe the shape of the ordinate distribution of machined textured surfaces compared to commonly used parameters such as skewness and kurtosis.
Article
Chemistry, Physical
Bartlomiej Krawczyk, Piotr Szablewski, Michal Mendak, Bartosz Gapinski, Krzysztof Smak, Stanislaw Legutko, Michal Wieczorowski, Edward Miko
Summary: This study analyzed the surface topography of external threads and investigated the influence of factors such as cutting speed, turning direction, and profile type. The results showed that the thread surfaces exhibited irregular roughness, and the edges of the contours in the insert feed direction had higher roughness compared to the opposite edges.
Article
Chemistry, Physical
Wojciech Kacalak, Dariusz Lipinski, Filip Szafraniec, Michal Wieczorowski, Pawel Twardowski
Summary: The article discusses the technological aspects of diagnosing grinding processes and highlights the importance of the main features of the grinding process. It presents issues related to the assessment of the condition of grinding wheel surfaces and suggests the use of new parameters to differentiate surface conditions. The article also formulates a methodology for assessing abrasive grain wear and changes in the shape and dimensions of the grinding wheel.
Article
Chemistry, Physical
Wojciech Kacalak, Dariusz Lipinski, Filip Szafraniec, Michal Wieczorowski, Pawel Twardowski
Summary: The paper discusses the diagnostic aspects of grinding processes, taking into account the metrological aspects of evaluating machined surfaces and assessing machining accuracy. It describes the creation of the geometric structure of ground surfaces and identifies the dependence of important process diagnostic features on the mechanism of cumulative random disturbances. The paper also presents methods for determining the classification ability of specific parameters used to evaluate stereometric features and evaluates the ability of different parameters to distinguish various geometric structures of surfaces.
Article
Chemistry, Physical
Michal Wieczorowski, Alejandro Pereira, Diego Carou, Bartosz Gapinski, Ignacio Ramirez
Summary: This study focuses on analyzing the porosity of AA5356 walls manufactured using the WAAM process with the Fronius cold metal transfer system. The results show that increasing travel speed and cooling time significantly affects pore diameter, and porosity can be reduced by diminishing heat accumulation. However, there is no relation between the porosity and the ultimate tensile strength and yield strength measured by computed tomography.
Article
Chemistry, Multidisciplinary
Michal Jakubowicz, Bartosz Gapinski, Lidia Marciniak-Podsadna, Michal Mendak, Patryk Mietlinski, Michal Wieczorowski
Summary: This paper discusses the multiscale analysis of reproduction accuracy of jaw geometry using selected orthodontic materials. Measurements were made using noncontact systems such as an optical 3D scanner, computed tomography, and a focus variation microscope. Results showed that silicone had the smallest deviations and the best fit with the plaster model. The study confirmed the validity of using multiscale analysis for geometric analysis.
APPLIED SCIENCES-BASEL
(2023)
Editorial Material
Chemistry, Physical
Pawel Twardowski, Michal Wieczorowski
Review
Chemistry, Physical
Karol Grochalski, Wojciech Rukat, Bartosz Jakubek, Michal Wieczorowski, Marcin Slowinski, Karolina Sarbinowska, Wieslaw Grabon
Summary: The performance of a heat sink is determined by cooling method, shape, and material. This paper reviews the influence of geometry and surface parameters on heat transfer in heat sinks. Simulation studies show that a wave fin heat sink performs the best in terms of geometries. The surface texture of fins also affects heat transfer efficiency, with different effects for active and passive cooling. The cooling method, particularly forced airflow, is found to be the most important factor affecting heat dissipation efficiency.
Article
Chemistry, Physical
Rehan Khan, Michal Wieczorowski, Darko Damjanovic, Mohammad Rezaul Karim, Ibrahim A. Alnaser
Summary: This paper conducts a failure analysis on a leaking pipe jet nozzle and discusses the results in detail. The investigation includes visual observation, microscopy, 3D scanning, spectroscopy, and measurements. Numerical simulations are also performed to investigate the root cause of the failure and find an alternative design to prevent leaks. The study finds that increased turbulence and multiple impacts of particles on the wall lead to leaks and cracks in the pipe jet nozzle. Moreover, the proposed alternative design shows a significant reduction in erosion rate compared to the failed pipes.
Proceedings Paper
Engineering, Mechanical
Alejandro Pereira, Maria Teresa Prado, Maria Fenollera, Michal Wieckzorowski, Thomas Mathia
Summary: In this study, robotic machining of polyurethane material was conducted, and it was found that the lack of rigidity in the robot's morphology resulted in macro and micro-dimensional errors. These errors were significantly reduced by limiting the freedom degree of the robot.
INNOVATIONS IN MECHANICAL ENGINEERING
(2022)
Article
Engineering, Mechanical
Busra Duran, Jerome Cavoret, David Philippon, Fabrice Ville, Arnaud Ruellan, Frank Berens
Summary: This study analyzes the changes in the physicochemical properties and tribological performances of gear transmission oils during field operation, finding differences from traditional engine oils.
TRIBOLOGY INTERNATIONAL
(2024)
Article
Engineering, Mechanical
Baocheng Liu, Hongsheng Chen, Jun Zhou, Jing Wang, Wenxian Wang, Xiaochun Chen, Sanxiao Xi
Summary: This study used fast hot pressing sintering to fabricate WC/AlCoCrFeNi2.1 metal matrix composites (MMCs). It was found that the addition of reinforced particles increased the microhardness, nanoindentation and wear resistance of the MMCs. During frictional processes, an oxide film formed, providing material protection, enhancing stability and reducing friction-induced losses.
TRIBOLOGY INTERNATIONAL
(2024)
Article
Engineering, Mechanical
Pradip Kumar Verma, Alok Singh
Summary: This study investigates the mechanical properties and wear resistance of CoMoMnNiV high entropy alloy reinforced aluminium matrix composite processed through stir-squeeze casting assisted with an ultrasonic transducer. The results show significant improvements in mechanical properties and wear resistance, with the composite containing 8 wt% HEA demonstrating the highest resistance to wear. Optical microscopy, SEM, and an optical profilometer were used for a thorough examination of the microstructure and worn surface.
TRIBOLOGY INTERNATIONAL
(2024)
Article
Engineering, Mechanical
Zhenghai Yang, Yingjian Song, Jinlong Jiao, Wenbo Li, Bao Shangguan, Yongzhen Zhang
Summary: This study investigated the friction, wear properties, and current-carrying properties of copper-graphite composites paired with brass C28000. The results showed that the current-carrying properties of the composite materials were excellent, but their wear rate was the main limiting factor. Furthermore, an increase in the thickness of the graphite layer led to an improvement in the uniformity of damage.
TRIBOLOGY INTERNATIONAL
(2024)
Article
Engineering, Mechanical
Moustafa Mahmoud Yousry Zaghloul, Karen Steel, Martin Veidt, Michael T. Heitzmann
Summary: This research evaluates and compares the impact of different material types on the tribological characteristics of Polyamide 6 composites, and finds that glass fiber-reinforced Polyamide 6 exhibits better friction and wear performance under high-pressure velocity factors.
TRIBOLOGY INTERNATIONAL
(2024)
Article
Engineering, Mechanical
Shaoqing Qin, Lida Zhu
Summary: In this paper, the surface and subsurface damage of laser assisted grinding CrCoNi medium entropy alloys were investigated using molecular dynamics simulations. The results showed that the application of laser energy can reduce cutting forces and minimize subsurface damage.
TRIBOLOGY INTERNATIONAL
(2024)
Article
Engineering, Mechanical
Kaikui Zheng, Youxi Lin, Tingzheng Lai, Chenghui Gao, Ming Liu, Zhiying Ren
Summary: The study investigated the use of waste foundry resin-bonded sand as a substitute for copper in resin-based brake material. It found that the waste sand was more favorable for improving the overall friction and wear properties of the material compared to copper. Waste sand benefited the material by forming a friction layer, leading to increased friction coefficient and stability. Brake material with 10-15% waste sand showed excellent heat-fade resistance.
TRIBOLOGY INTERNATIONAL
(2024)
Article
Engineering, Mechanical
Dayang Li, Fanhao Zhou, Yutong Gao, Kun Yang, Huimin Gao
Summary: This article introduces a continuous prediction model based on deep learning for predicting the power output of steam turbines. The model uses long short term memory (LSTM) method to develop a trend prediction model and optimizes the prediction model through feature selection method. Experimental results show that the model outperforms other models in terms of prediction performance.
TRIBOLOGY INTERNATIONAL
(2024)
Article
Engineering, Mechanical
Tomohiro Toyoda, Ryo Yasuike, Toshihiro Noda
Summary: In this study, a elasto-plastic constitutive model of friction incorporating the concept of superloading surface was developed based on the subloading friction model. The proposed model achieves a smooth transition of friction by describing the evolution rule of structure, treating the state with static friction coefficient larger than kinetic friction coefficient as the bulkiness of structure. The positive definiteness of the plastic multiplier, loading condition, and material parameters were derived, and the validity of the proposed model in accordance with the subloading-friction model was confirmed through a stick-slip simulation of a mass-spring system.
TRIBOLOGY INTERNATIONAL
(2024)
Article
Engineering, Mechanical
P. Balaji, B. Surya Rajan, K. Sathickbasha, P. Baskara Sethupathi, Deviga Magadevan
Summary: This study emphasizes the importance of using a variety of solid lubricants with different oxidation temperature regimes to enhance the tribological performance of brake pads.
TRIBOLOGY INTERNATIONAL
(2024)
Article
Engineering, Mechanical
Jian Ma, Yancong Liu, Javad Mostaghimi, Na Zhang
Summary: This paper investigates the influence of preparation strategies on the lubrication properties of surface textures. Three laser scanning strategies are proposed to achieve a sinusoidal textured surface, and the evolution of surface structure and chemical composition is discussed. The findings show that ridge structures enhance anti-wear properties but also increase the friction coefficient. However, the oil cover preparation method prevents the formation of ridges and improves wettability.
TRIBOLOGY INTERNATIONAL
(2024)
Article
Engineering, Mechanical
Mohammad Roostaei, Arvin Taghizadeh Tabrizi, Hossein Aghajani
Summary: In this research, the Al2O3/MoS2 nanocomposite coating layer was successfully applied on the surface of Ti-6Al-4 V alloy. The relation between the surface characteristics and wear resistance of the coating was studied using atomic force microscopy analysis and pin-on-disk wear test method. The results showed that the nanocomposite coating significantly reduced the wear rate and provided an equation to calculate the Lancaster coefficient.
TRIBOLOGY INTERNATIONAL
(2024)
Article
Engineering, Mechanical
Musa Bilgin, Sener Karabulut, Halil Karakoc, Yunus Kayir, Murat Sarikaya
Summary: This study investigates various methods to improve the machinability efficiency of Inconel 718 alloy while considering their effect on microstructural properties. The results show that hot+PMQL, hot+SiCNMQL, and hot+Al2O3-NMQL contribute significantly to the improvement of machinability characteristics. The EBSD analysis also reveals that a limited area is affected by heat in the hot machining environment and that the removal of the heated layer during milling process helps preserve the microstructure.
TRIBOLOGY INTERNATIONAL
(2024)
Article
Engineering, Mechanical
Q. Gao, Y. Fan, Y. G. Wu, J. L. Liu, J. Wang, L. Li
Summary: Fretting wear significantly affects the hysteresis behavior of the contact surface and leads to joint degradation. This study investigates the influence of harmonic normal force on the evolution of interface morphology and contact parameters with fretting wear. The results show that the harmonic normal force can significantly influence the hysteresis loop and the energy dissipation distribution on the contact surface.
TRIBOLOGY INTERNATIONAL
(2024)
Article
Engineering, Mechanical
Benjamin Weiland, Floriane Leclinche, Anis Kaci, Brigitte Camillieri, Betty Lemaire-Semail, Marie -Ange Bueno
Summary: This study presents a systematic approach to generating control signals for a tactile simulator that simulate the touch of textile fabrics. By using a friction modulation tactile surface and acquiring forces from real surfaces with artificial finger mimicking fingerprints, control signals are generated and processed in the frequency domain before sending them to the tactile stimulator. The study focuses on the potential benefits of incorporating fingerprint information in fabric simulations to achieve a more realistic tactile perception. A sensory analysis with 36 participants using the generated control signals showed better discrimination without fingerprint information.
TRIBOLOGY INTERNATIONAL
(2024)
