Увійти

Готові списки джерел за темами / Soft lubrication / Статті в журналах

Статті в журналах з теми "Soft lubrication"

Щоб переглянути інші типи публікацій з цієї теми, перейдіть за посиланням: Soft lubrication.

Автор: Grafiati

Опубліковано: 7 липня 2024

Оновлено: 7 липня 2024

Оформте джерело за APA, MLA, Chicago, Harvard та іншими стилями

Оберіть тип джерела:

Ознайомтеся з топ-50 статей у журналах для дослідження на тему "Soft lubrication".

Біля кожної праці в переліку літератури доступна кнопка «Додати до бібліографії». Скористайтеся нею – і ми автоматично оформимо бібліографічне посилання на обрану працю в потрібному вам стилі цитування: APA, MLA, «Гарвард», «Чикаго», «Ванкувер» тощо.

Також ви можете завантажити повний текст наукової публікації у форматі «.pdf» та прочитати онлайн анотацію до роботи, якщо відповідні параметри наявні в метаданих.

Переглядайте статті в журналах для різних дисциплін та оформлюйте правильно вашу бібліографію.

1

Pandey, Anupam, Stefan Karpitschka, Cornelis H. Venner, and Jacco H. Snoeijer. "Lubrication of soft viscoelastic solids." Journal of Fluid Mechanics 799 (June 23, 2016): 433–47. http://dx.doi.org/10.1017/jfm.2016.375.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Анотація:

Lubrication flows appear in many applications in engineering, biophysics and nature. Separation of surfaces and minimisation of friction and wear is achieved when the lubricating fluid builds up a lift force. In this paper we analyse soft lubricated contacts by treating the solid walls as viscoelastic: soft materials are typically not purely elastic, but dissipate energy under dynamical loading conditions. We present a method for viscoelastic lubrication and focus on three canonical examples, namely Kelvin–Voigt, standard linear and power law rheology. It is shown how the solid viscoelasticity affects the lubrication process when the time scale of loading becomes comparable to the rheological time scale. We derive asymptotic relations between the lift force and the sliding velocity, which give scaling laws that inherit a signature of the rheology. In all cases the lift is found to decrease with respect to purely elastic systems.

2

Wang, Leizhen, Wen Wang, Shangjun Chen, and Yujian Bai. "Study on Lubricating Performance of Soft Slider Bearing in Conformal Contact." Journal of Physics: Conference Series 2355, no. 1 (October 1, 2022): 012074. http://dx.doi.org/10.1088/1742-6596/2355/1/012074.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Анотація:

ABSTRACT In this paper, the lubricating performance of soft slider bearing in conformal contact is analyzed. Compared with the hard slider, the soft slider will have greater elastic deformation under low pressure. Three kinds of sliders with different elastic modulus are used for comparative study in this paper. The materials of the three sliders are: steel, glass and PMMA. A hydrodynamic lubrication model of conformal contact considering elastic deformation is established according to the theory of fluid lubrication. A program for calculating dynamic pressure lubrication performance of conformal contact considering elastic deformation is developed by using Matlab and Comsol. The influence of different inclination, different speed and different load on hydrodynamic lubrication performance was studied respectively. The results show that under the same conditions, the elastic deformation on the surface of the slider is more conducive to the formation of oil film, and more conducive to the conditions of high load.

3

Andablo-Reyes, Efrén, Juan de Vicente, Roque Hidalgo-Álvarez, Connor Myant, Thomas Reddyhoff, and Hugh A. Spikes. "Soft Elasto-Hydrodynamic Lubrication." Tribology Letters 39, no. 1 (May 29, 2010): 109–14. http://dx.doi.org/10.1007/s11249-010-9623-3.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

4

Masjedi, M., and MM Khonsari. "Mixed lubrication of soft contacts: An engineering look." Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology 231, no. 2 (August 5, 2016): 263–73. http://dx.doi.org/10.1177/1350650116652286.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Анотація:

Mixed elastohydrodynamic lubrication of materials with low elastic modulus (soft materials) is investigated. Expressions for prediction of film thickness and the asperity load ratio in soft line-contact elastohydrodynamic lubrication are presented. The traction behavior of soft contact in mixed elastohydrodynamic lubrication regime is also studied in terms of the Stribeck curves.

5

Wongseedakaew, Khanittha, and Jesda Panichakorn. "Rough Air-Soft Elastohydrodynamic Lubrication." Applied Mechanics and Materials 420 (September 2013): 30–35. http://dx.doi.org/10.4028/www.scientific.net/amm.420.30.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Анотація:

This paper presents the effects of rough surface air-soft elastohydrodynamic lubrication (EHL) of rollers for soft material under the effect of air molecular slip. The time independent modified Reynolds equation and elasticity equation were solved numerically using finite different method, Newton-Raphson method and multigrid multilevel methods were used to obtain the film pressure profiles and film thickness in the contact region. The effects of amplitude of surface roughness, modulus of elasticity and air inlet temperature are examined. The simulation results showed surface roughness has effect on film thickness but it little effect to air film pressure. When the amplitude of surface roughness and modulus of elasticity increased, the air film thickness decreased but air film pressure increased. However, the air inlet temperature increased when the air film thickness increased.

6

Kim, Andrew T., Jongwon Seok, John A. Tichy, and Timothy S. Cale. "Soft Elastohydrodynamic Lubrication With Roughness." Journal of Tribology 125, no. 2 (March 19, 2003): 448–51. http://dx.doi.org/10.1115/1.1494100.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Анотація:

A “soft” elastohydrodynamic lubrication model for a conformal one-dimensional sliding contact is presented. We describe surface-surface and fluid-surface interactions in conditions where asperities are in direct contact (mixed lubrication), and the effective film thickness is comparable in size to the roughness of the bounding surfaces. In the conditions considered, surfaces have a low elastic modulus, and fluid pressures have a low magnitude, relative to those found in most tribology applications. An interesting coupling is exhibited between the surface roughness, the global elasticity, and the fluid pressure. As opposed to typical tribological applications in conformal mixed lubrication contact, fluid pressure is strong enough to cause significant elastic displacement of the mean boundary surfaces. The deformation is taken into account in an iterative process to compute the resulting spatially dependent stresses, deformations and fluid pressures.

7

Zhu, Zenghao, Rungun Nathan, and Qianhong Wu. "Multi-scale soft porous lubrication." Tribology International 137 (September 2019): 246–53. http://dx.doi.org/10.1016/j.triboint.2019.05.003.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

8

Dedinaite, A., T. Pettersson, B. Mohanty, and P. M. Claesson. "Lubrication by organized soft matter." Soft Matter 6, no. 7 (2010): 1520. http://dx.doi.org/10.1039/b918415e.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

9

de Vicente, J., J. R. Stokes, and H. A. Spikes. "Soft lubrication of model hydrocolloids." Food Hydrocolloids 20, no. 4 (June 2006): 483–91. http://dx.doi.org/10.1016/j.foodhyd.2005.04.005.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

10

Sarkar, Anwesha, Efren Andablo-Reyes, Michael Bryant, Duncan Dowson, and Anne Neville. "Lubrication of soft oral surfaces." Current Opinion in Colloid & Interface Science 39 (February 2019): 61–75. http://dx.doi.org/10.1016/j.cocis.2019.01.008.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

11

Putignano, Carmine. "Soft lubrication: A generalized numerical methodology." Journal of the Mechanics and Physics of Solids 134 (January 2020): 103748. http://dx.doi.org/10.1016/j.jmps.2019.103748.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

12

Zhang, Hua, Guangwu Zhou, Ping Zhong, Kepeng Wu, and Xingwu Ding. "Experimental investigation on Stribeck curves of different elastic modulus materials under oil and water lubrication conditions." Industrial Lubrication and Tribology 72, no. 6 (March 4, 2020): 805–10. http://dx.doi.org/10.1108/ilt-08-2019-0305.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Анотація:

Purpose The purpose of this paper is to study the influence of friction coefficient of materials with different elastic modulus on the variation of velocity and load under water lubrication and oil lubrication conditions. Design/methodology/approach Low-viscosity lubricating oil and water were used as lubricants to test the friction performance of the ball-disc contact friction pair in the lubrication state on the universal micro-tribometer multi-functional friction and wear test system. Findings In the same speed range, the lubrication states from soft to rigid materials are not necessarily similar to each other. Generally, the material with low elastic modulus is suitable in low-viscosity lubricant environments, while the material with high elastic modulus has relatively smaller friction coefficients in oil-lubricated environments compared with water lubrication. However, the coefficients of polyethylene, polytetrafluoroethylen and polyoxymethylene are exceeded by rubber’s coefficients under water lubrication in the same experiment environments, and their lubrication states are not affected by lubricants. The friction coefficient of the friction pair decreases with the increase of loads; however, it does not apply to all materials. The friction coefficients of materials with smaller elastic modulus such as rubber under high loads are rather large. Therefore, the elastic modulus of the material under high loads is a factor to be considered. Originality/value The Stribeck curves study of the ball-disk contact friction pair comprising soft and rigid materials, whose elastic modulus is from hundreds of GPa to a few of MPa, was carried out. The influence of different speeds, loads and lubricants on the friction coefficient of the friction pair was revealed, which provided a research basis for the selection and matching of friction pair materials.

13

Yan, Songshan, Ling Qin, Rui Hu, and Zuomin Liu. "A Novel Inward Gradient Self-Lubrication Layer with Soft Alloys and Its Lubricating Mechanism." Advances in Materials Science and Engineering 2016 (2016): 1–7. http://dx.doi.org/10.1155/2016/9286450.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Анотація:

A novel ceramic composite inward gradient distribution layer has been developed. The layer is a lubricating layer in which soft-metal lubricants are compounded into the ceramic matrix by high frequency induction infiltrating method. The design of the layer and its lubricating mechanism are investigated in the paper. The results show that the property of the layer greatly depends on the wetting angle of the soft-metal lubricants on the matrix and the proportion of Ag, Cu, Sn, and Pb as well as the infiltrating parameters. Based on a lot of experiments, a novel inward gradient layer with Pb28Sn19Ag6Cu has been developed. The layer has an excellent lubricating property (friction coefficient about 0.2~0.3 at 600°C). The research reveals the lubricating mechanism, observing the phenomenon that the soft-metal in the matrix diffuses out of the frictional surface, and measures the lubricating film thickness as about 20 μm on the worn surface.

14

Liu, ShuHai, GuiBin Tan, and DeGuo Wang. "Linear polymer aqueous solutions in soft lubrication: From boundary to mixed lubrication." Science China Technological Sciences 56, no. 7 (April 2, 2013): 1709–14. http://dx.doi.org/10.1007/s11431-013-5197-2.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

15

Persson, B. N. J., and M. Scaraggi. "On the transition from boundary lubrication to hydrodynamic lubrication in soft contacts." Journal of Physics: Condensed Matter 21, no. 18 (March 11, 2009): 185002. http://dx.doi.org/10.1088/0953-8984/21/18/185002.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

16

Li, Yang, Zelong Zhou, and Yongyong He. "Solid Lubrication System and Its Plasma Surface Engineering: A Review." Lubricants 11, no. 11 (November 3, 2023): 473. http://dx.doi.org/10.3390/lubricants11110473.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Анотація:

In aerospace, aviation, nuclear power, and other high-tech fields, some essential moving parts must operate under high vacuum, high load, intense radiation, and other conditions. Under such extreme conditions, only solid lubricating materials can meet the lubrication requirements. Traditional material modification methods have problems such as high energy consumption, severe pollution, and narrow scope of application. Plasma modification technology can overcome these shortcomings. This paper focuses on several commonly used plasma preparation techniques for solid lubricating coatings, including plasma chemical heat treatment, physical vapor deposition, plasma immersion ion implantation and deposition, plasma spraying, and plasma electrolytic oxidation. Subsequently, the material systems of metal-based solid lubrication coatings are reviewed: soft metals, oxides, sulfides, nitrides, and carbon-based materials. Finally, found that the development of new solid lubricants, the improvement of existing preparation technology, and the development of new processes are the key development directions in the future.

17

Xu, Yuan, and Jason R. Stokes. "Soft lubrication of model shear-thinning fluids." Tribology International 152 (December 2020): 106541. http://dx.doi.org/10.1016/j.triboint.2020.106541.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

18

Putignano, Carmine, and Daniele Dini. "Soft Matter Lubrication: Does Solid Viscoelasticity Matter?" ACS Applied Materials & Interfaces 9, no. 48 (November 17, 2017): 42287–95. http://dx.doi.org/10.1021/acsami.7b09381.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

19

Moghani, Taraneh, James P. Butler, and Stephen H. Loring. "Determinants of friction in soft elastohydrodynamic lubrication." Journal of Biomechanics 42, no. 8 (May 2009): 1069–74. http://dx.doi.org/10.1016/j.jbiomech.2009.02.021.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

20

Unsworth, A., M. J. Pearcy, E. F. T. White, and G. White. "Soft layer lubrication of artificial hip joints." Journal of Synthetic Lubrication 5, no. 1 (April 1988): 55–72. http://dx.doi.org/10.1002/jsl.3000050105.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

21

Huang, Kun, Qiuzhi Song, Pengwan Chen, Ye Liu, and Yinping Jing. "Wear Mechanism of Fe/Cu Self-Lubricating Composite Coatings Fabricated by Electro-Explosive Spraying under Dry Friction." Metals 13, no. 2 (February 14, 2023): 390. http://dx.doi.org/10.3390/met13020390.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Анотація:

In the present work, Fe/Cu composite coatings were fabricated by electro-explosive spraying technology (EEST), with good lubrication performance and high wear resistance. The microstructure and morphology were characterized by an energy-dispersive spectrometer (EDS), 3D digital microscope, and scanning electron microscope (SEM) coupled with electron backscattered diffraction (EBSD). Mechanical properties and tribological performance were measured using a micro Vickers hardness tester, universal testing machine, and universal friction and wear testing machine. The composite coating had low porosity with a minimum value of 0.7%, high microhardness with a maximum value of 729.9 HV0.2, high bonding strength with a maximum average value of 55.25 MPa, and good wear resistance and self-lubrication, and the ratio of soft metal and hard metal in the coatings was controllable. Under dry friction conditions, the friction reduction mechanism was that there were both metallic oxide particles and soft metal attached in the friction pairs. When the ratio of soft metal in the composite coating was higher, the self-lubricating performance of the coating was better, with adhesive wear as the main wear mechanism; when the ratio of hard metal was higher, the wear resistance was better and the wear mechanism was mainly abrasive wear.

22

Porte, Elze, Philippa Cann, and Marc Masen. "A lubrication replenishment theory for hydrogels." Soft Matter 16, no. 45 (2020): 10290–300. http://dx.doi.org/10.1039/d0sm01236j.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

23

Ouyang, Jia Hu, Takashi Murakami, Shinya Sasaki, Yu Feng Li, Ya Ming Wang, K. Umeda, and Yu Zhou. "High Temperature Tribology and Solid Lubrication of Advanced Ceramics." Key Engineering Materials 368-372 (February 2008): 1088–91. http://dx.doi.org/10.4028/www.scientific.net/kem.368-372.1088.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Анотація:

The high-temperature friction and wear characteristics of different ceramics and ceramic matrix composites (CMCs) incorporated with various solid lubricants have been investigated from room temper- ature to 1000oC. The solid lubricants considered in this paper include representative precious metals, hexagonal boron nitride, graphite, fluorides, soft oxides, chromates, sulfates, and combinations of various solid lubricants. General design considerations relevant to solid lubrication were proposed on the basis of friction and wear data of self-lubricating CMCs. The self-lubricating composites incorporated with SrSO4 or/and CaSiO3 exhibits low and stable friction coefficients of 0.2 to 0.3 and small wear rates in the order of 10-6 mm3/Nm from room temperature to 800oC. The optimized composites appear to be promising can- didates for long-duration, extreme environment applications with low friction and small wear rate.

24

Yao, J. Q. "Contact Mechanics of Soft Layer Artificial Hip Joints: Part 1: General Solutions." Proceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine 208, no. 4 (December 1994): 195–205. http://dx.doi.org/10.1243/pime_proc_1994_208_289_02.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Анотація:

Unlike natural synovial joints, which are lubricated with a full fluid film lubrication mechanism, conventional artificial hip joints are lubricated with a mixed lubrication mechanism. Recently, however, a new generation of artificial hip joints employing compliant layers to mimic the compliance of articular cartilage in natural synovial joints have been developed to provide fluid film lubrication in these joints. While satisfactory lubrication can be achieved by employing soft layers, compliant thin layers are susceptible to the debonding between the soft layer and its stiffer substrate and long-term mechanical fatigue failure. Stress analyses for different designs of such joints are therefore important. In the present paper, the circular contact between a rigid sphere and an elastomeric layer bonded on to a rigid substrate has been analysed with a novel semi-analytical approach. The detailed contact parameters (the contact radius, the maximum surface deformation, the contact pressure and the contact stress inside the layer) have been examined for a wide range of aspect ratios (0 ≤ a/ht ≤ 100).

25

Peng, Y., C. M. Serfass, C. N. Hill, and L. C. Hsiao. "Bending of Soft Micropatterns in Elastohydrodynamic Lubrication Tribology." Experimental Mechanics 61, no. 6 (April 7, 2021): 969–79. http://dx.doi.org/10.1007/s11340-021-00715-8.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

26

Panichakorn, Jesda. "Theoretical Investigation of Surface under Soft Mixed Lubrication." Applied Mechanics and Materials 851 (August 2016): 326–32. http://dx.doi.org/10.4028/www.scientific.net/amm.851.326.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Анотація:

This paper presents the effect of surface roughness in line contact under isothermal soft mixed lubrication with non-Newtonian based on Power law viscosity model. The time independent modified Reynolds equation, elasticity equation and the load capacity of asperities equation were numerically solved using finite different method, Newton-Raphson method and multigrid multilevel methods to obtain the film pressure profiles, film thickness profiles and contact pressure in the contact regions. The simulation results showed that the the amplitude of surface roughness has a significant effects on the film pressure, film thickness and surface contact pressure in the contact region. The minimum gap between surface, friction coefficient and asperity load increase when the amplitude of surface roughness increases. For increasing surface velocity, the minimum gap between surface increases but asperity load decreases.

27

Ortigosa-Moya, E. M., K. Shahrivar, R. Hidalgo-Álvarez, and J. de Vicente. "Soft lubrication of cornstarch-based shear-thickening fluids." Smart Materials and Structures 28, no. 8 (July 23, 2019): 085044. http://dx.doi.org/10.1088/1361-665x/ab22e5.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

28

Cheng, Wen-Chieh, Lin Wang, Zhong-Fei Xue, James C. Ni, Md Mizanur Rahman, and Arul Arulrajah. "Lubrication performance of pipejacking in soft alluvial deposits." Tunnelling and Underground Space Technology 91 (September 2019): 102991. http://dx.doi.org/10.1016/j.tust.2019.102991.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

29

Stupkiewicz, Stanisław, Jakub Lengiewicz, Przemysław Sadowski, and Stanisław Kucharski. "Finite deformation effects in soft elastohydrodynamic lubrication problems." Tribology International 93 (January 2016): 511–22. http://dx.doi.org/10.1016/j.triboint.2015.03.016.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

30

Budt, M., İ. Temizer, and P. Wriggers. "A computational homogenization framework for soft elastohydrodynamic lubrication." Computational Mechanics 49, no. 6 (April 28, 2012): 749–67. http://dx.doi.org/10.1007/s00466-012-0709-7.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

31

Li, Hulin, and Jingshu Cao. "The tribological properties of bearing alloys under oil lubrication." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 234, no. 10 (January 23, 2020): 2042–52. http://dx.doi.org/10.1177/0954406220902168.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Анотація:

In this article, the tribological behaviors of CuPb24Sn under different load and oil lubrication conditions were studied. The worn surface, material transfer, and debris of the material were analyzed by the scanning electron microscopy and energy-dispersive X-ray spectrometer. In addition, the wear rate of CuPb24Sn was measured by means of a laser microscopic 3D and profile measurement apparatus. The results show that the soft phase lead wears preferentially from the sample surface under both light and heavy load conditions. Under the light load condition, the wear rate of the soft phase lead is low. Therefore, in this condition the samples are lubricated by oil and surface residual lead, and the wear mechanism is mainly abrasive wear. However, under heavy load conditions, the soft phase lead is quickly consumed. The lubricating oil film is thinner and the asperities contact is increased. And then the surface temperature and oxidation of samples are increased too. In this case, the main wear mechanisms of samples are adhesive wear and oxidation wear. At the same time, with the depletion of lead, cracks begin to form and propagate at the interface between lead and copper, and then peel off from the matrix to form wear debris, which further accelerates the wear of the sample.

32

Ouyang, Jia-Hu, Yu-Feng Li, Yun-Zhuo Zhang, Ya-Ming Wang, and Yu-Jin Wang. "High-Temperature Solid Lubricants and Self-Lubricating Composites: A Critical Review." Lubricants 10, no. 8 (August 7, 2022): 177. http://dx.doi.org/10.3390/lubricants10080177.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Анотація:

Solid lubricants are described as solid materials of intentionally introduced or in situ formed on contact surfaces in relative motion for the purpose of lowering friction and wear and providing protection from damage. Solid lubricants and advanced self-lubricating materials are widely used in modern industries, especially in aerospace, aviation, automotive, metallurgy, materials forming, and machining industries, and have attracted great interest in lubrication applications under very severe circumstances such as elevated temperatures, heavy loads, ultrahigh vacuum, extreme radiation, strong oxidation, and chemical reactivity environments. Many efforts have been made to develop self-lubricating composites by a variety of material preparation techniques, which include powder metallurgy, physical/chemical vapor depositions, thermal spraying, electrodeposition, laser cladding, and additive manufacturing. Although several reviews on the development of high-temperature solid lubricants have been published, most of them only focus on a type of material, a specific process, or application. In this paper, a comprehensive review is provided to present the state-of-the-art progress in solid lubricants, self-lubricating composites/coatings, and their effective functions that can be used over a wide variety of environmental conditions, especially at elevated temperatures. The solid lubricants considered include representative soft metals, layered structure materials (e.g., graphite, hexagonal boron nitride, transition metallic dichalcogenides, MAX phase), chemically stable fluorides, binary or ternary metallic oxides, especially alkaline earth chromates, and sulfates, and synergistic effects from these solid lubricants. This paper also provides new insights into design considerations of environmental adaptive solid lubrication, and the challenges and potential breakthroughs are further highlighted for high-temperature solid lubrication applications.

33

Hooke, C. J., and P. Huang. "Elastohydrodynamic lubrication of soft viscoelastic materials in line contact." Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology 211, no. 3 (March 1, 1997): 185–94. http://dx.doi.org/10.1243/1350650971542417.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Анотація:

The paper discusses the influence of viscoelasticity in elastohydrodynamic lubrication (EHL). It is shown that viscoelastic effects, particularly in soft materials such as rubber and polymers, may significantly affect the lubrication process. The variations of the pressure and film thickness with viscoelasticity are discussed, as is the internal energy loss in the material. Two effects are present. The first, controlled by the Deborah number based on the Hertz contact width, determines the width of the contact, the overall pressure distribution and the energy loss. The second, controlled by the Deborah number based on the entrainment length, largely determines the thickness of the entrained film and the minimum film thickness.

34

Pitenis, A. A., J. M. Urueña, K. D. Schulze, R. M. Nixon, A. C. Dunn, B. A. Krick, W. G. Sawyer, and T. E. Angelini. "Polymer fluctuation lubrication in hydrogel gemini interfaces." Soft Matter 10, no. 44 (2014): 8955–62. http://dx.doi.org/10.1039/c4sm01728e.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

35

Macknojia, Ali Z., Vanessa L. Montoya, Euan Cairns, Mohammad Eskandari, Shuangbiao Liu, Yip-Wah Chung, Q. Jane Wang, et al. "Tribological Analysis of Steels in Fuel Environments: Impact of Alloy Content and Hardness." Applied Sciences 14, no. 5 (February 26, 2024): 1898. http://dx.doi.org/10.3390/app14051898.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Анотація:

The performance and durability of high-pressure fuel systems in combustion engines are critical for consistent operation under extreme conditions. High-pressure fuel systems are traditionally lubricated with fuel that is compressed and delivered to the combustion chamber. However, lubrication with fuel presents significant challenges in these systems when used with low-viscosity fuels, leading to increased wear rates, especially in reciprocating contacts. This study delved into the tribological performance of steels of varying alloy content (annealed and hardened variants of AISI-52100, CF2, and D2) against alumina and hard 52100 counterbody materials in ethanol and decane environments. Friction and wear behaviors were evaluated, highlighting the influence of material interactions and environmental factors. Elastohydrodynamic lubrication analysis of the tested systems indicated that ethanol and decane form lubricating films of nanometer-scale thickness, confirming the boundary lubrication regimes of the performed tests. In summary, the tribological behavior trends were similar for alumina and 52100 counterbodies. Even though soft 52100 steel demonstrated low friction, its wear was the largest for both tested environments and counterface materials. Among all the tested materials, hard D2 experienced the lowest wear. 52100 and D2 steels showed opposite friction change behavior when comparing hard and soft samples, with lower friction observed for softer 52100 steel and harder D2 steel. Meanwhile, the wear was lower for harder candidates than for softer ones independent of the environment and counterbody material. Raman spectroscopy analysis of the formed wear tracks indicated the formation of carbon films with larger intensities of characteristic carbon peaks observed for more wear-resistant materials. These results suggest the synergistic effect of hardness and tribochemical activity in reducing the wear of materials.

36

Wang, Yumo, Matthew R. Tan, and Joelle Frechette. "Elastic deformation of soft coatings due to lubrication forces." Soft Matter 13, no. 38 (2017): 6718–29. http://dx.doi.org/10.1039/c7sm01061c.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Анотація:

Elastic deformation of rigid materials with soft coatings (stratified materials) due to lubrication forces can also alter the interpretation of dynamic surface forces measurements and prevent contact formation between approaching surfaces.

37

Skotheim, J. M., and L. Mahadevan. "Soft lubrication: The elastohydrodynamics of nonconforming and conforming contacts." Physics of Fluids 17, no. 9 (September 2005): 092101. http://dx.doi.org/10.1063/1.1985467.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

38

Saintyves, Baudouin, Theo Jules, Thomas Salez, and L. Mahadevan. "Self-sustained lift and low friction via soft lubrication." Proceedings of the National Academy of Sciences 113, no. 21 (May 9, 2016): 5847–49. http://dx.doi.org/10.1073/pnas.1525462113.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Анотація:

Relative motion between soft wet solids arises in a number of applications in natural and artificial settings, and invariably couples elastic deformation fluid flow. We explore this in a minimal setting by considering a fluid-immersed negatively buoyant cylinder moving along a soft inclined wall. Our experiments show that there is an emergent robust steady-state sliding regime of the cylinder with an effective friction that is significantly reduced relative to that of rigid fluid-lubricated contacts. A simple scaling approach that couples the cylinder-induced flow to substrate deformation allows us to explain the elastohydrodynamic lift that underlies the self-sustained lubricated motion of the cylinder, consistent with recent theoretical predictions. Our results suggest an explanation for a range of effects such as reduced wear in animal joints and long-runout landslides, and can be couched as a design principle for low-friction interfaces.

39

Giraud, Lucie, Gwénaëlle Bazin, and Suzanne Giasson. "Lubrication with Soft and Hard Two-Dimensional Colloidal Arrays." Langmuir 33, no. 15 (April 4, 2017): 3610–23. http://dx.doi.org/10.1021/acs.langmuir.7b00006.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

40

Bongaerts, J. H. H., K. Fourtouni, and J. R. Stokes. "Soft-tribology: Lubrication in a compliant PDMS–PDMS contact." Tribology International 40, no. 10-12 (October 2007): 1531–42. http://dx.doi.org/10.1016/j.triboint.2007.01.007.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

41

Hooke, C. J. "A Note on the Elastohydrodynamic Lubrication of Soft Contacts." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 200, no. 3 (May 1986): 189–94. http://dx.doi.org/10.1243/pime_proc_1986_200_114_02.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Анотація:

The clearances in highly loaded non-Hertzian contacts can be calculated directly from the dry contact pressure distribution. This note presents a method of extending the analysis into less highly loaded regions. It is shown that the method accurately predicts the clearance over much of the transition zone for Hertzian contacts and its use in a non-Hertzian situation is illustrated using the contact between a rigid cylinder and an elastomer-lined surface as an example.

42

Li, Zhaoxia, Shuanhong Ma, Ga Zhang, Daoai Wang, and Feng Zhou. "Soft/Hard-Coupled Amphiphilic Polymer Nanospheres for Water Lubrication." ACS Applied Materials & Interfaces 10, no. 10 (February 22, 2018): 9178–87. http://dx.doi.org/10.1021/acsami.8b00405.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

43

Kabacaoğlu, G., and İ. Temizer. "Homogenization of soft interfaces in time-dependent hydrodynamic lubrication." Computational Mechanics 56, no. 3 (July 11, 2015): 421–41. http://dx.doi.org/10.1007/s00466-015-1179-5.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

44

Tsai, Hung Jung, Jeng Haur Horng, and Chung Ming Tan. "Investigation of Lubrication Characteristics for a Soft Contact Lens." Key Engineering Materials 823 (September 2019): 105–9. http://dx.doi.org/10.4028/www.scientific.net/kem.823.105.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Анотація:

It is popular to wear the contact lens nowadays. Also, the output value of the contact lens is estimated more than 4 billion NT dollar every year. Because the phenomena of the contact lenses are very complicated, the relevant mechanisms are not well understood. Thus, the security of contact lens needs to be further investigated. In the lubricated mechanism of the contact lens, there is a layer of tear between the contact lens and cornea. The contact lens’ behavior is akin to that of a slider bearing. The lens represents the slider, the eye plays the role of the stationary pad, and the tear film is the lubricant. Hence, hydrodynamics and contact mechanisms of a contact lens are quite a fascinating subject that is relevant to the science of tribology. In the paper, the lubrication mechanisms include the partial hydrodynamic lubrication (contact lens roughness), contact mechanics and Newtonian fluid mechanics have been established. The parameters of roughness, flow factor, tear film geometry, and hydrodynamic pressure distribution are discussed. The developed technology increases the safety of contact lens.

45

Liu, Tianfei, Fardin Khabaz, Roger T. Bonnecaze, and Michel Cloitre. "On the universality of the flow properties of soft-particle glasses." Soft Matter 14, no. 34 (2018): 7064–74. http://dx.doi.org/10.1039/c8sm01153b.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

46

de Vicente, J., H. A. Spikes, and J. R. Stokes. "Viscosity Ratio Effect in the Emulsion Lubrication of Soft EHL Contact." Journal of Tribology 128, no. 4 (June 7, 2006): 795–800. http://dx.doi.org/10.1115/1.2345400.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Анотація:

Many foodstuffs and personal care products consist of two-phase systems which, during use, are rubbed between compliant biosurfaces to form thin lubricating films. It is important to understand the nature and properties of the films thus formed since these contribute to the user’s sensory perception, and thus appreciation, of the products concerned. In this paper, the lubrication properties of simple oil-in-aqueous phase emulsions are studied in a steel/elastomer “soft-EHL” contact. It is found that overall behavior is strongly dependent on the ratio of the viscosities of the two phases. When the viscosity of the dispersed oil phase is lower or comparable to that of the continuous aqueous phase, the latter enters the contact and controls film formation and friction. However, when the dispersed phase has viscosity at least four times larger than the dispersion medium, the former enters the contact and determines its tribological properties. This effect is believed occur because at high viscosity ratios the droplets are nondeformable and are thus forced into the contact inlet region, where collisions occur that result in shear-induced coalescence. Once a pool of viscous fluid is formed, the lower viscosity bulk fluid is unable to displace it because the viscous shear stress is too small, so the pool acts as a reservoir to supply the contact.

47

Salant, R. F. "Soft elastohydrodynamic analysis of rotary lip seals." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 224, no. 12 (April 27, 2010): 2637–47. http://dx.doi.org/10.1243/09544062jmes2181.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Анотація:

The extensive literature on the elastohydrodynamic analysis of rotary lip seals is reviewed. Models that predict quantities such as film thickness and reverse pumping rate and that elucidate the physical processes governing the behaviour of rotary lip seals are described. Thermal effects, mixed lubrication, capillary effects, transients, viscoelasticity, statistical approaches, and so-called hydrodynamic seals are discussed.

48

Scholes, S. C., A. Unsworth, J. M. Blamey, I. C. Burges, E. Jones, and N. Smith. "Design aspects of compliant, soft layer bearings for an experimental hip prosthesis." Proceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine 219, no. 2 (February 1, 2005): 79–87. http://dx.doi.org/10.1243/095441105x9318.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Анотація:

Currently, an artificial hip joint can be expected to last, on average, in excess of 15 years with failure due, in the majority of cases, to late aseptic loosening of the acetabular component. A realistic alternative to the problem of wear in conventional joints is the introduction of bearing surfaces that exhibit low wear and operate in the full fluid-film lubrication regime. Contact analyses and friction tests were performed on compliant layer joints (metal-on-polyurethane) and the design of a prototype ovine arthroplasty model was investigated. When optimized, these components have been shown to achieve full fluid-film lubrication.

49

Hooke, C. J. "Calculation of Clearances in Soft Point Contacts." Journal of Tribology 110, no. 1 (January 1, 1988): 167–73. http://dx.doi.org/10.1115/1.3261558.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Анотація:

The clearances in highly deformed contacts are formed in a narrow region on the upstream side, are convected through the contact with little change and emerge downstream where a restriction forms in a narrow exit zone. The paper describes how this behavior simplifies the lubrication analysis. Expressions for the minimum film thickness under point contacts are obtained for the elastic isoviscous regime.

50

DellaCorte, Christopher, Antonio R. Zaldana, and Kevin C. Radil. "A Systems Approach to the Solid Lubrication of Foil Air Bearings for Oil-Free Turbomachinery." Journal of Tribology 126, no. 1 (January 1, 2004): 200–207. http://dx.doi.org/10.1115/1.1609485.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Анотація:

Foil air bearings are self-acting hydrodynamic bearings which rely upon solid lubricants to reduce friction and minimize wear during sliding which occurs at start-up and shut-down when surface speeds are too low to allow the formation of a hydrodynamic air film. This solid lubrication is typically accomplished by coating the nonmoving foil surface with a thin, soft polymeric film. The following paper introduces a systems approach in which the solid lubrication is provided by a combination of self lubricating shaft coatings coupled with various wear resistant and lubricating foil coatings. The use of multiple materials, each providing different functions is modeled after oil-lubricated hydrodynamic sleeve bearing technology which utilizes various coatings and surface treatments in conjunction with oil lubricants to achieve optimum performance. In this study, room temperature load capacity tests are performed on journal foil air bearings operating at 14,000 rpm. Different shaft and foil coating technologies such as plasma sprayed composites, ceramic, polymer and inorganic lubricant coatings are evaluated as foil bearing lubricants. The results indicate that bearing performance is improved through the individual use of the lubricants and treatments tested. Further, combining several solid lubricants together yielded synergistically better results than any material alone.