Article
Engineering, Mechanical
Shuilin Lin, Jianliang Sun, Yan Peng
Summary: This study proposes a new concept and corresponding mechanical model for the investigation of axial fretting phenomenon in a roughing mill bearing. Experimental data is collected using a test rig, and advanced signal processing techniques are applied to provide improved maintenance strategies for the bearing.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2022)
Article
Mechanics
Pengfei Wang, Yang Yang, Baogang Wen, Hui Ma, Qingkai Han, Zhong Luo, Xiaopeng Li, Bangchun Wen
Summary: A special test rig is designed to study the vibration problem caused by bearing assembly errors. The dynamic model of the spindle-bearing-pedestal system is established and the characterization method for bearing misalignments is given. The effect of misalignment level on spindle vibration response is studied and the vibration characteristics of the spindle system under the joint effect of raceway misalignment and waviness are analyzed. The results show that the bearing assembly errors greatly affect the machining accuracy of the machine tool and that angular misalignment has a greater impact on system vibration than parallel misalignment.
MECHANICS BASED DESIGN OF STRUCTURES AND MACHINES
(2023)
Article
Engineering, Mechanical
Lorenzo Maccioni, Valery G. Chernoray, Christof Bohnert, Franco Concli
Summary: Experimental studies on rolling-element bearing lubrication have shown that with increasing rotational speed, bubbles caused by aeration phenomena tend to appear and significantly modify the behavior of the lubricant.
TRIBOLOGY INTERNATIONAL
(2022)
Article
Mathematics, Applied
Rajesh C. Shah
Summary: This study investigates the effect of elastic deformation on load-carrying capacity in inclined slider-bearing and presents the numerical simulation results. The analysis shows that elastic deformation has no impact on load-carrying capacity.
ZAMM-ZEITSCHRIFT FUR ANGEWANDTE MATHEMATIK UND MECHANIK
(2022)
Article
Engineering, Mechanical
Anil Dhanola, Hem Chander Garg
Summary: The experimental study demonstrated that adding titanium oxide nanoparticles to vegetable oil-based lubricants can enhance the performance of hydrodynamic journal bearings. However, the effectiveness of nanoparticles is limited under high operating conditions, with an optimal volume fraction of 0.02%. Moreover, nanolubricants showed improved heat transfer rates and reduced fluid film temperatures compared to base oil.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART J-JOURNAL OF ENGINEERING TRIBOLOGY
(2021)
Article
Engineering, Mechanical
T. Touret, C. Changenet, F. Ville, J. Cavoret
Summary: This study presents an experimental investigation on a FZG test rig to highlight the influence of micropitting on power losses and temperatures in a geared system. The impact of micropitting on power losses and temperatures was evaluated with specific characterization tests, and gear surface roughness modification was monitored during these tests. The results show increased power loss and oil temperature due to micropitting development, with a correlation between power loss and temperature variations and surface feature measurements.
TRIBOLOGY INTERNATIONAL
(2021)
Article
Engineering, Electrical & Electronic
Eugenio Brusa, Cristiana Delprete, Lorenzo Giorio, Luigi Gianpio Di Maggio, Vittorio Zanella
Summary: This paper presents an innovative bearing test rig architecture based on the concept of a self-contained box, which allows for self-balancing and modular layout of the bearing test. It provides important experimental data for the remote monitoring of industrial systems.
Article
Engineering, Marine
Ganbo Zhang, Yao Zhao, Wei Chu
Summary: Propeller-induced longitudinal vibration resonance in marine propulsion shafting systems is harmful to the hull structure and a major source of shipboard noise. Integrating a friction damper with thrust bearings can effectively control the transmission of longitudinal vibration. Experimental and theoretical studies confirm the effectiveness of the damper-integrated thrust bearing in suppressing shafting vibration response.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2022)
Article
Mechanics
Tobias S. Hartwich, Stefan Panek, Dirk Wilckens, Matthias Bock, Dieter Krause
Summary: This paper investigates the buckling behavior of thin-walled cylindrical CFRP shells under compressive loads. It is found that the experimental buckling load is significantly lower than the theoretical prediction due to various imperfections caused by the manufacturing process and test conditions. The lack of experimental data and the rarely critically reviewed test results pose challenges in the design of these shells. The influence of different manufacturing processes and test rigs on the buckling load is studied through an experimental campaign with 12 cylindrical CFRP shells, and the effect of varying the test rig boundary conditions is also analyzed.
COMPOSITE STRUCTURES
(2023)
Article
Engineering, Electrical & Electronic
Hannes Schmiedeke, Jan-Hinrich Sick, Michael Sinapius
Summary: The next few years will see major changes in the mobility sector in order to achieve CO2 neutrality. Fuel cells will play an important role in the commercial vehicle sector, with a focus on improving the efficiency of vehicle components, including bearings in electrical air compressors. A prototype that can switch between different bearing shapes is being investigated to improve durability and performance.
Article
Engineering, Mechanical
Grzegorz Kudra, Jose M. Balthazar, Angelo M. Tusset, Grzegorz Wasilewski, Bartosz Stanczyk, Jan Awrejcewicz
Summary: The study demonstrates that introducing a MR rotational damper can effectively suppress chaotic behavior in a pendulum system. Additionally, it shows that using a rotational MR damper with energizing discontinuity can maintain periodic oscillations in the pendulum system.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2022)
Article
Engineering, Electrical & Electronic
Hannes Schmiedeke, Michael Sinapius, Nontavut Prechavut
Summary: Foil bearings allow rotors to achieve high rotational speeds with less friction and wear, but predicting the real behavior in rotordynamic systems becomes more complex. Impedance test rigs are suitable for investigating structural-dynamic bearing properties and validating theoretical models.
Article
Engineering, Multidisciplinary
Zhifeng Shi, Jing Liu
Summary: Collisions between a roller and its cage can cause crack initiation and propagation, resulting in the fracture of the cage bridge. The strain distribution of the cage is influenced by the impact forces applied to a needle roller-bearing cage bridge, which is related to the relative speed of the roller and cage. This study constructed a needle roller-bearing roller-cage impact test rig to measure cage strain and investigate the effects of speed on roller-cage impact forces.
MEASUREMENT SCIENCE AND TECHNOLOGY
(2023)
Article
Engineering, Mechanical
Hui Li, Hao Li, Rongfeng Zhang, Yi Liu, Shemiao Qi, Heng Liu
Summary: By analyzing the influence of the supporting stiffness and the structure of the spindle on the critical speed, it was found that the shape of the first-mode is the bend vibration of the cantilever of the spindle; the first-order critical speed of the spindle decreases with the diameter and length of the cantilever increasing; the first-order critical speed of the spindle increases with the depth and diameter of the blind hole increasing. The experiment results show that the spindle can work stably, providing valuable theoretical reference for similar spindle designs.
INDUSTRIAL LUBRICATION AND TRIBOLOGY
(2021)
Article
Acoustics
Aram Mahmoodi, Hamid Ahmadian
Summary: This paper investigates the nonlinear dynamics of turbine blades caused by friction, specifically focusing on the coupling effect in an experimental turbine blade model. The study highlights the importance of considering the coupling phenomenon, as it significantly affects the results compared to ignoring it. Experimental analysis validates the accuracy of the proposed solution method by reproducing numerical results from previous references. The research shows that considering the coupling effect between the tangential and normal directions in the contact model is crucial in accurately predicting the resonance amplitude and frequency.
SHOCK AND VIBRATION
(2022)
Article
Thermodynamics
H. Allmaier, C. Knauder, S. Salhofer, F. M. Reich, E. Schalk, H. Ofner, A. Wagner
INTERNATIONAL JOURNAL OF ENGINE RESEARCH
(2016)
Article
Engineering, Mechanical
H. Allmaier, D. E. Sander, H. H. Priebsch, M. Witt, T. Fuellenbach, A. Skiadas
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART J-JOURNAL OF ENGINEERING TRIBOLOGY
(2016)
Article
Engineering, Mechanical
David E. Sander, H. Allmaier, H. H. Priebsch, P. M. Reich, M. Witt, A. Skiadas, O. Knaus
TRIBOLOGY INTERNATIONAL
(2015)
Article
Engineering, Mechanical
D. E. Sander, H. Allmaier, H. H. Priebsch, M. Witt, A. Skiadas
TRIBOLOGY INTERNATIONAL
(2016)
Article
Engineering, Mechanical
Christoph Knauder, Hannes Allmaier, Stefan Salhofer, Theodor Sams
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART J-JOURNAL OF ENGINEERING TRIBOLOGY
(2018)
Article
Engineering, Mechanical
David E. Sander, Hannes Allmaier
TRIBOLOGY INTERNATIONAL
(2018)
Article
Engineering, Mechanical
Christoph Knauder, Hannes Allmaier, David E. Sander, Theodor Sams
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART J-JOURNAL OF ENGINEERING TRIBOLOGY
(2020)
Article
Engineering, Mechanical
Hannes Allmaier
Summary: This literature review examines grease lubrication in rolling bearings and discusses potential ways to improve the service life of greases, with a focus on their application in rail wheel bearings. Understanding the fundamental lubrication processes is crucial for increasing the service life of rail wheel bearings.
Article
Engineering, Mechanical
Christoph Knauder, Hannes Allmaier, David E. Sander, Theodor Sams
Article
Engineering, Mechanical
Christoph Knauder, Hannes Allmaier, David E. Sander, Theodor Sams
Article
Engineering, Mechanical
Christoph Knauder, Hannes Allmaier, David E. Sander, Theodor Sams
Article
Engineering, Mechanical
David E. Sander, Christoph Knauder, Hannes Allmaier, Slavitsa Damjanovic-Le Baleur, Philippe Mallet
Proceedings Paper
Engineering, Biomedical
H. Allmaier, D. E. Sander, M. Witt, A. Skiadas
M2D2015: PROCEEDINGS OF THE 6TH INTERNATIONAL CONFERENCE ON MECHANICS AND MATERIALS IN DESIGN
(2015)
Article
Engineering, Mechanical
Christoph Knauder, Hannes Allmaier, David Emanuel Sander, Stefan Salhofer, Franz Markus Reich, Theodor Sams
Article
Engineering, Mechanical
Hannes Allmaier, David E. Sander
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)
