Article
Engineering, Mechanical
G. H. G. van der Meer, F. Quinci, W. Litwin, M. Wodtke, R. A. J. van Ostayen
Summary: The study investigates the application of a modified MR fluid in lubrication performance using a journal bearing test bench. It is found that applying a local magnetic field can significantly reduce the transition speed of the bearing when lubricated with MR fluid, with only a minimal increase in friction. The lubricating performance of the MR fluid is compared to a reference oil.
TRIBOLOGY INTERNATIONAL
(2023)
Article
Chemistry, Applied
Raisa E. D. Rudge, Melissa J. Mosselman, Heather M. Shewan, Jason R. Stokes, Joshua A. Dijksman, Elke Scholten
Summary: This study investigates the lubrication behavior of Newtonian lubricants and hydrogel microparticle suspensions using four different tribometers. The results show that the motion of the tribometer significantly influences the frictional behavior and different tribometers exhibit specific lubrication regimes. The findings highlight the system dependency of tribological measurements.
FOOD HYDROCOLLOIDS
(2023)
Article
Engineering, Mechanical
D. Bulut, N. Bader, G. Poll
Summary: This study combines experimental and numerical simulation methods to observe cavitation and measure film thickness using laser induced fluorescence, and establishes a model for hydrodynamic film formation based on cavitation. The influences of structuring, macro surface irregularities, and cavitation pressure are investigated. Validation of numerical results is done through experiments.
TRIBOLOGY INTERNATIONAL
(2021)
Review
Chemistry, Applied
Anwesha Sarkar, Siavash Soltanahmadi, Jianshe Chen, Jason R. Stokes
Summary: Research on food oral processing is crucial for governing sensory appreciation, pleasurable experience of consuming foods, and regulating nutrient intake. Tribology, as the study of friction and lubrication, provides insights into the physics of oral processing and sensory perception, making it a key tool in understanding these complex processes.
FOOD HYDROCOLLOIDS
(2021)
Article
Engineering, Mechanical
Nathan Fantecelle Strey, Rogerio Ramos, Cherlio Scandian
Summary: Water-lubricated ceramic sliding tribosystems can reduce frictional energy losses under superlubricity conditions. This study investigated the aqueous superlubricity of 5 different ceramic tribopairs and identified wear mechanisms and lubrication regimes. The results showed that all pairs exhibited superlubricity for certain combinations of load and speed, with mild wear regimes after running-in period.
Article
Food Science & Technology
Chaiwut Gamonpilas, Chi-na Benyajati, Wuttipong Sritham, Jenwit Soparat, Nattawut Limprayoon, Nispa Seetapan, Asira Fuongfuchat
Summary: This study designed and manufactured a modular tribological cell to simulate lubricated soft-hard contact interfaces and perform tribological measurements. The cell was validated using corn syrup solutions as model liquid foods and demonstrated the ability to obtain the Stribeck curve. It was also used to investigate the effects of applied normal load and surface wetting on the tribological response of lubricated hard-soft contact and the impact of fat content on the lubrication properties of commercial liquid and semi-solid foods.
CURRENT RESEARCH IN FOOD SCIENCE
(2022)
Article
Engineering, Mechanical
Jie Guo, Yanxin Si, Qiang Liu, Xinjian Cao, Jun Cheng, Jun Yang, Weimin Liu
Summary: Through the study of the stribeck curve, static friction, and a series of fixed-speed friction tests for steel self-mated pairs under gallium lubrication, the lubrication regimes and transition laws are revealed. In the sliding speed ranging from 10-8 to 1.4 m/s and the normal load ranging from 2 to 20 N, gallium can only provide boundary and mixed lubrication. Uniformly distributed or island-like distributed gallium-rich films are formed under boundary or mixed lubrication regimes, respectively. The different formation mechanisms are revealed. The failure of the gallium-rich film is mainly related to the average contact stress of the frictional interfaces.
TRIBOLOGY INTERNATIONAL
(2023)
Article
Engineering, Mechanical
Mikel Iribecampos, Ibai Ulacia, Aitor Arana, Jon Larranaga
Summary: Traction in lubricated rolling and sliding contacts is crucial for the performance of machine elements. The combined effects of contact scale and spin motion on traction have not been studied before. This study developed a novel semi-analytical model considering spin motion and found that increasing contact size and spinning speed reduces traction coefficient and contact efficiency due to thermal effects. These findings have important practical implications for designing machine elements.
TRIBOLOGY INTERNATIONAL
(2023)
Article
Engineering, Chemical
Fanjing Meng, Huabo Liu, Shaozhen Hua, Minghua Pang
Summary: This study investigates the sliding tribological characteristics of parallel plates lubricated by dense dry particles. Experimental results show that dry particle lubrication exhibits excellent lubrication characteristics on sliding friction, with friction force increasing linearly with pressure load.
Article
Engineering, Biomedical
Shabnam Z. Bonyadi, Connor J. Demott, Melissa A. Grunlan, Alison C. Dunn
Summary: This study compared the tribological behavior of four double network hydrogels with fresh cartilage in water and FBS, finding that hydrogels with neutral or zwitterionic second networks exhibited the lowest friction and shear stresses, meeting or even surpassing the lubrication demands for cartilage replacement in load bearing joints. Differences in charge and structure were more pronounced in water than in FBS, with all hydrogels showing a wide range of lubrication responses. In FBS, most friction coefficient values were below 0.3, indicating a similar lubrication mechanism as that of cartilage in maintaining a stable solution layer at the interface during sliding.
JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS
(2021)
Article
Engineering, Electrical & Electronic
Gwanghee Hong, Kyobong Kim, Youngjun Park, Gunhee Jang
Summary: This paper proposes a numerical method to investigate the frictional characteristics of a fluid film journal bearing considering the elastohydrodynamic lubrication and the asperity contact force. The method is verified by comparing the calculated friction coefficient with experimental data, and it is applied to study the frictional characteristics of a scroll compressor journal bearing under dynamic loads.
Article
Engineering, Mechanical
Bojan Mitevski, Dzhem Kurtulan, Stefanie Hanke
Summary: Wear mechanisms are determined by the tribological load spectrum, surrounding conditions, materials properties, and surfaces. This study compares the wear behaviors of three different steels under the same test conditions, showing the influence of microstructure and hardness on wear behavior. The interdependence of material properties and resulting wear behavior is highlighted, with differences in wear mechanisms observed among the tested steels.
Article
Engineering, Mechanical
Toshiaki Nishi, Takeshi Yamaguchi, Kei Shibata, Kazuo Hokkirigawa
Summary: Moisture covering about 5% of the real contact area can enhance the friction between artificial skin block with fingerprint pattern and a glass plate, leading to the formation of negative pressure at the meniscus which promotes the formation of real contacts.
TRIBOLOGY INTERNATIONAL
(2021)
Article
Chemistry, Multidisciplinary
Hao Dong, Nichole Moyle, Haibin Wu, Constantine Yuri Khripin, Chung-Yuen Hui, Anand Jagota
Summary: Lubricated contacts in soft materials are common in various applications. The transition between elasto-hydrodynamic lubrication (EHL) and mixed lubrication (ML) regimes governs the minimum sliding friction achievable. Previous belief held that the transition occurs when the thickness of the lubricant layer is comparable with the amplitude of surface roughness, but this study found that the transition can occur when the thickness of the liquid layer is much larger than the height of the asperities. Direct visualization showed the formation of wave-like surface wrinkles triggering the transition to the mixed regime.
ADVANCED MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Mohammadamin Sadeghi, Takeru Omiya, Filipe Fernandes, Luis Vilhena, Amilcar Ramalho, Fabio Ferreira
Summary: Diamond-like carbon (DLC) coatings are used in industries for high durability, wear resistance, and low friction. This study investigated the combined effects of Eu-DLC, Gd-DLC, and pure DLC coatings with an ionic liquid (IL) additive on lubrication performance. The Gd-DLC coating showed superior hardness, adhesion, and friction coefficient when paired with the IL. The findings suggest that the combination of Gd-DLC films with an IL has potential for reducing friction and improving efficiency in moving parts.
Article
Engineering, Chemical
B. N. J. Persson, M. Scaraggi
Article
Engineering, Mechanical
M. Scaraggi, J. Angerhausen, L. Dorogin, H. Murrenhoff, B. N. J. Persson
Article
Nanoscience & Nanotechnology
Alexei Khomenko, Miroslav Zakharov, Denis Boyko, Bo N. J. Persson
BEILSTEIN JOURNAL OF NANOTECHNOLOGY
(2018)
Article
Multidisciplinary Sciences
Mehmet Ayyildiz, Michele Scaraggi, Omer Sirin, Cagatay Basdogan, Bo N. J. Persson
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2018)
Article
Engineering, Chemical
Alexei Khomenko, Miroslav Zakharov, Bo N. J. Persson
Article
Chemistry, Multidisciplinary
Mingming Rong, Hui Liu, Michele Scaraggi, Yanyan Bai, Luyao Bao, Shuanhong Ma, Zhengfeng Ma, Meirong Cai, Daniele Dini, Feng Zhou
ADVANCED FUNCTIONAL MATERIALS
(2020)
Article
Physics, Condensed Matter
Bo N. J. Persson
Summary: This paper presents a general theory of electroadhesion for layered materials with finite electric conductivity and an air gap caused by interfacial surface roughness. The theory is shown to reduce to previous results under certain limits, with numerical results provided to illustrate its application.
JOURNAL OF PHYSICS-CONDENSED MATTER
(2021)
Article
Physics, Multidisciplinary
Martin H. Mueser, Bo N. J. Persson
Summary: This article presents simulations on the sticking contact between a rigid cylinder and a viscoelastic half space, revealing a maximum in the work of separation at intermediate pull-off velocities. The maximum tensile forces increase monotonically with the pull-off speed and the crack tip speed, consistent with the Persson-Brener approach. Additionally, the fracture mode transitions from interfacial crack propagation to quasi-uniform bond breaking with an increasing range of adhesion.
Article
Engineering, Mechanical
Toshi Tada, Satoshi Kawasaki, Ryouske Shimizu, Bo N. J. Persson
Summary: We investigate the friction between a rectangular tire tread rubber block and an ice surface under different temperatures (-38 to -2 degrees C) and sliding speeds (3 mu m/s to 1 cm/s). At low temperatures and low sliding speeds, slip between the ice surface and ice fragments attached to the rubber surface plays a significant role in the friction force. When the temperature is above -10 degrees C or the sliding speed is high enough, a thin premelted water film forms on the ice surface, reducing the contribution of shearing the area of real contact to the friction force. Instead, the viscoelastic deformations of the rubber caused by the ice asperities become the dominant contribution to the friction force. We also discuss the impact of waxing on the friction between skis and snow (ice particles).
Article
Materials Science, Multidisciplinary
Jianjun Wang, Avinash Tiwari, Jie Gao, Yang Huang, Yu Jia, Bo N. J. Persson
Summary: In this study, we investigate the role of electronegativity in sliding friction of two-dimensional monolayer systems. Our results show that the friction force strongly depends on the electronegativity difference between the atoms involved. When sliding along a nonpolar path, the friction force is almost the same for all studied systems, regardless of the material and surface structures. However, for sliding along a polar path, the friction force follows a universal linear scaling law, where the force is proportional to the electronegativity difference between constituent atoms. We further demonstrate that the electronegativity-induced atomic dipoles enhance the corrugation of charge distribution, leading to increased sliding barriers.
Article
Engineering, Chemical
B. N. J. Persson, A. Tiwari, G. L. Dorogin, Juelich, Gert Heinrich, M. Tahir, K. W. Stoeckelhuber
KGK-KAUTSCHUK GUMMI KUNSTSTOFFE
(2020)
Proceedings Paper
Engineering, Mechanical
Julian Angerhausen, Hubertus Murrenhoff, Bo N. J. Persson, Katharina Schmitz
PROCEEDINGS OF THE ASME/BATH SYMPOSIUM ON FLUID POWER AND MOTION CONTROL, 2019
(2020)
Retraction
Materials Science, Multidisciplinary
A. I. Volokitin, B. N. J. Persson
Article
Engineering, Mechanical
Julian Angerhausen, Hubertus Murrenhoff, Bo N. J. Persson, Leonid Dorogin, Michele Scaraggi
INTERNATIONAL JOURNAL OF FLUID POWER
(2019)
Article
Chemistry, Physical
Bo N. J. Persson, Jianglong Guo
