Yves Berthier
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View article: Experimental study of the influence of the relative humidity of leaves and their link to adhesion losses in the wheel-rail contact
Experimental study of the influence of the relative humidity of leaves and their link to adhesion losses in the wheel-rail contact Open
Every autumn, low levels of wheel–rail contact adhesion caused by leaves on the railhead surface are reported by train drivers. These incidents cause problems for the safety and regularity of rail traffic and occur predominantly at the beg…
View article: An attempt to generate mechanical white etching layer on rail surface on a new rolling contact test bench
An attempt to generate mechanical white etching layer on rail surface on a new rolling contact test bench Open
View article: Valve-seat components in a diesel engine: a tribological approach to limit wear
Valve-seat components in a diesel engine: a tribological approach to limit wear Open
Within diesel engines, the valve-seat contact is one of the few non-lubricated contacts which is subjected to significant degradation. This degradation is put in evidence by material removal at the intake valve. The material pull out is pr…
View article: New “Tribo-bioreactor” for In-situ Monitoring of the Mechanical Stress Transmission at the Cellular Level: Application to Cartilage Tissue Engineering
New “Tribo-bioreactor” for In-situ Monitoring of the Mechanical Stress Transmission at the Cellular Level: Application to Cartilage Tissue Engineering Open
View article: Frictional behaviour of a greased contact under low sliding velocity condition
Frictional behaviour of a greased contact under low sliding velocity condition Open
View article: Lessons learned using machine learning to link third body particles morphology to interface rheology
Lessons learned using machine learning to link third body particles morphology to interface rheology Open
View article: Tribological investigation of a greased contact subjected to contact dynamic instability
Tribological investigation of a greased contact subjected to contact dynamic instability Open
View article: Estimation of the Normal Contact Stiffness for Frictional Interface in Sticking and Sliding Conditions
Estimation of the Normal Contact Stiffness for Frictional Interface in Sticking and Sliding Conditions Open
Modeling of frictional contact systems with high accuracy needs the knowledge of several contact parameters, which are mainly related to the local phenomena at the contact interfaces and affect the complex dynamics of mechanical systems in…
View article: Thermo-mechanical behavior of a granular media in a rotating drum
Thermo-mechanical behavior of a granular media in a rotating drum Open
In the complex granular flow, the shear and flow of particles lead to increase in temperature that can enchain behavioral modifications. However, their thermo-mechanical and electrical behavior is of great interest for applications such as…
View article: Contact stiffness estimation for PMMA/STEEL contact pair
Contact stiffness estimation for PMMA/STEEL contact pair Open
Modelling of frictional contact systems with high accuracy needs the knowledge of several contact parameters that are mainly related to the properties of the contact interfaces. While the interface parameters cannot be directly obtained by…
View article: Examination of stick-slip scenario on lubricated spring-brake systems
Examination of stick-slip scenario on lubricated spring-brake systems Open
Several complex mechanisms can be responsible for undesirable friction-induced vibrations in many mechanical systems. This paper presents a tribological and dynamic analysis of the stick-slip problem, under greased lubrication, taking into…
View article: Influence of Copper/Graphite Properties on the Tribological and Electrical Behavior of Copper-Graphite Third Body Layer
Influence of Copper/Graphite Properties on the Tribological and Electrical Behavior of Copper-Graphite Third Body Layer Open
The understanding of rail braking is irrevocably dependent on the tribological analysis of contacts such as the wheel/rail contact or the wheel/brake disc contact. Because it is very complex to experimentally analyze the inside of a contac…
View article: “Tribological solicitations” of piezoelectric inertia motors by means of in situ tribotesting and 3rd body flow framework
“Tribological solicitations” of piezoelectric inertia motors by means of in situ tribotesting and 3rd body flow framework Open
View article: From electrochemical behaviour to biotribocorrosion of metal alloys dedicated to joint prostheses
From electrochemical behaviour to biotribocorrosion of metal alloys dedicated to joint prostheses Open
View article: Self-lubricating polymer composites : using numerical trbology to hightlight their design criterion
Self-lubricating polymer composites : using numerical trbology to hightlight their design criterion Open
International audience
View article: Space Grease Tribological Behavior for Refourmulation: Numerical and Experimental Investigations
Space Grease Tribological Behavior for Refourmulation: Numerical and Experimental Investigations Open
International audience
View article: Caractérisation à l'usure du couple céramique-céramique utilisé dans les prothèses totales de hanche
Caractérisation à l'usure du couple céramique-céramique utilisé dans les prothèses totales de hanche Open
View article: Space grease lubrication modeling: A discrete element approach
Space grease lubrication modeling: A discrete element approach Open
View article: Investigation of the role of contact-induced vibrations in tactile discrimination of textures
Investigation of the role of contact-induced vibrations in tactile discrimination of textures Open
\nTactile perception of texture is meaningful for numerous industrial and social applications. While the sense of touch is provided by several contributing factors, each related to different sensory cutaneous units, textures with non-low s…
View article: An improved 2D fem model for straight track corrugation using the mass redistribution method
An improved 2D fem model for straight track corrugation using the mass redistribution method Open
In railway networks, rail corrugation remains a major problem which increases due to heavy traffic under urban conditions: various frictions, train dynamics, etc. But it is difficult to identify the real influence of each factor on both th…
View article: Self-lubricating composite bearings: Effect of fibre length on its tribological properties by DEM modelling
Self-lubricating composite bearings: Effect of fibre length on its tribological properties by DEM modelling Open
View article: MSPA : un micro-système d'actionnement piézoélectrique pas-à-pas polyvalent
MSPA : un micro-système d'actionnement piézoélectrique pas-à-pas polyvalent Open
Les moteurs piezoelectriques pas-a-pas (SPA) utilisent le principe de stick&slip pour convertir l'energie electrique en energie mecanique grâce a une interface de frottement. Ces moteurs permettent une haute resolution de positionnement ( …
View article: Numerical investigation on the electrical transmission ability of a shearing powder layer
Numerical investigation on the electrical transmission ability of a shearing powder layer Open
View article: Role of Third Body on Bolted Joints' Self-Loosening
Role of Third Body on Bolted Joints' Self-Loosening Open
View article: Tribological Analysis of Bolted Joints Submitted to Vibrations
Tribological Analysis of Bolted Joints Submitted to Vibrations Open
An experimental approach was adopted to understand service damages such as crack initiation and surface degradation of bolted joints used in the junction technology of aircraft air bleed valve systems. A vibratory testing stage combined to…
View article: Design of a Dynamic Tribometer Applied to Piezoelectric Inertia Drive Motors - In Situ Exploration of Stick-Slip Principle -
Design of a Dynamic Tribometer Applied to Piezoelectric Inertia Drive Motors - In Situ Exploration of Stick-Slip Principle - Open
In Inertia Drive Motors, generated motion is based on stick-slip principle. Current analytical models are predictive enough to calculate qualitatively their optimal performances, such as maximal step size and speed, with relatively few inp…
View article: Auto-relâchement des assemblages boulonnés: rôle d'un troisième corps
Auto-relâchement des assemblages boulonnés: rôle d'un troisième corps Open
Colloque avec actes et comité de lecture. Internationale.
View article: Analyse tribologique d'un contact d'un assemblage boulonné via la DEM
Analyse tribologique d'un contact d'un assemblage boulonné via la DEM Open
Les methodes par elements discrets sont devenues incontournables en tribologie car elles nous offrent la possibilite de modeliser le comportement dynamique d'une interface. Elles sont utilisees ici pour modeliser l'interface des filets en …
View article: Thermo-Mechanical Investigations of a Tribological Interface
Thermo-Mechanical Investigations of a Tribological Interface Open