Výsledky vyhledávání - "Laetitia Martinie"

Discussion on 'Scale and contact geometry effects on friction in thermal EHL: Twin-disc versus ball-on-disc' by Liu, Zhang, Bader, Venner, Poll, Tribology International 154, 106694, 2021

Autor: Philippe Vergne, David Philippon, Laetitia Martinie

Publikováno v: Tribology International
Tribology International, Elsevier, 2021, 157, pp.106877. ⟨10.1016/j.triboint.2021.106877⟩

Liu et al. recently published a study on friction in heavily loaded lubricated contacts. They compare measurements obtained from tests carried out on two tribometers, at constant entrainment speed, temperature and contact pressure. They observe devia

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4f9b50c23a68b79623ef3e8da326b4d1
https://hal.archives-ouvertes.fr/hal-03200803

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On the Influence of Phase Change in Highly Loaded Frictional Contacts

Autor: Jérémie Margueritat, Serigne Ndiaye, Laetitia Martinie, David Philippon, Philippe Vergne, Marjolaine Gonon-Caux

Publikováno v: Tribology Letters
Tribology Letters, Springer Verlag, 2020, 68 (2), pp.54. ⟨10.1007/s11249-020-01298-6⟩

International audience; Highly loaded lubricated contacts may present a friction plateau on which the friction force becomes independent from the sliding velocity. Although this phenomenon has been known for a long time, its physical origin remains p

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::46fb4b9a0768c061c723fad42162dc6d
https://doi.org/10.1007/s11249-020-01298-6

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Independence between friction and velocity distribution in fluids subjected to severe shearing and confinement

Autor: Nicolas Fillot, Laetitia Martinie, Philippe Vergne, Alejandro Porras-Vazquez

Publikováno v: Physical Chemistry Chemical Physics
Physical Chemistry Chemical Physics, Royal Society of Chemistry, 2018, 20 (43), pp.27280-27293. ⟨10.1039/C8CP04620D⟩

Friction reduction is more than ever a key point in saving natural resources and energy, and the question of how to achieve this concerns first and foremost every lubricated system. Among the observed phenomena related to lubricated friction, limitin

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4b16f30840cc7b96fdfe045da909ce9d
https://doi.org/10.1039/c8cp04620d

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Film Forming Capability of Polymer-Base Oil Lubricants in Elastohydrodynamic and Very Thin Film Regimes

Autor: Pauline Cusseau, Laetitia Martinie, Fanny Briand, David Philippon, Nicolas Devaux, Philippe Vergne

Publikováno v: Tribology Letters
Tribology Letters, Springer Verlag, 2019, 67 (2), ⟨10.1007/s11249-019-1162-y⟩

International audience; The development of high-performance lubricants to insure the separation of mechanical parts, to reduce engine friction and consequently fuel consumption remains a major challenge for oil manufacturers. Polymer additives called

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9e6cec58b353c2fe85c1a90612449a20
https://doi.org/10.1007/s11249-019-1162-y

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Rheological Considerations on Polymer-Based Engine Lubricants: Viscosity Index Improvers versus Thickeners—Generalized Newtonian Models

Autor: Nathalie Bouscharain, Philippe Vergne, F. Briand, David Philippon, P. Cusseau, Laetitia Martinie

Publikováno v: Tribology Transactions
Tribology Transactions, Taylor & Francis, 2017, 61 (3), pp.437-447. ⟨10.1080/10402004.2017.1346154⟩

International audience; The development of high-performance lubricants to decrease engine friction and then reduce fuel consumption remains a major challenge for oil manufacturers. Viscosity index improvers (VIIs) are additives used for decades to re

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::936b1b6d2b84c0ae1314f5a74bda88ce
https://hal.archives-ouvertes.fr/hal-01922032

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A Quantitative Friction-Based Approach of the Limiting Shear Stress Pressure and Temperature Dependence

Autor: David Philippon, Philippe Vergne, Nicolas Devaux, S.-N. Ndiaye, Laetitia Martinie

Publikováno v: Tribology Letters
Tribology Letters, Springer Verlag, 2017, 65 (4), ⟨10.1007/s11249-017-0929-2⟩

International audience; Friction in highly loaded lubricated contacts (where the pressure is greater than 1 GPa) may present a plateau at intermediate slide-to-roll ratio, known in the literature as the limiting shear stress (LSS) plateau. Its physic

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0f443959e57bf7e2180e94847f943bfe
https://doi.org/10.1007/s11249-017-0929-2

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Apparent elongational yield stress of soft matter

Autor: H. Buggisch, Laetitia Martinie, N. Willenbacher

Publikováno v: Journal of Rheology. 57:627-646

Apparent elongational yield stresses of soft matter including polymer gels, highly concentrated emulsions, and aggregated suspensions have been determined from step stretch experiments. Materials display apparent shear yield stresses in the range 1�

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::27fcae7c3c4d592fc81665fdc0fd733d
https://doi.org/10.1122/1.4789785

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Classical EHL Versus Quantitative EHL: A Perspective Part II—Super-Arrhenius Piezoviscosity, an Essential Component of Elastohydrodynamic Friction Missing from Classical EHL

Autor: Philippe Vergne, Laetitia Martinie, Scott Bair

Publikováno v: Tribology Letters
Tribology Letters, Springer Verlag, 2016, 63 (3), pp.37. ⟨10.1007/s11249-016-0725-4⟩

International audience; Ninety years of high-pressure measurements with many different types of viscometers have shown that faster-than-exponential (super-Arrhenius) pressure dependence of viscosity is universal for glass-forming liquids and, therefo

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1e957be25411a116b63f5ad38e6e857c
https://doi.org/10.1007/s11249-016-0725-4

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Lubrication at Extreme Conditions: a Discussion about the Limiting Shear Stress Concept

Autor: Laetitia Martinie, Philippe Vergne

Publikováno v: Tribology Letters
Tribology Letters, Springer Verlag, 2016, 63 (2), pp.21. ⟨10.1007/s11249-016-0709-4⟩

International audience; Although limiting shear stress is a common behavior that is observed in many highly loaded lubricated contacts, its physical origins are still a matter of debate. Several scenarios are proposed in the literature to explain the

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cde5d9fe5720042f566da477b2baf65f
https://hal.archives-ouvertes.fr/hal-01349909

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