Aurélien Saulot
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View article: Multiscale microstructural investigations of white and brown etching layers initiating the squat formation in pearlitic rail steels
Multiscale microstructural investigations of white and brown etching layers initiating the squat formation in pearlitic rail steels Open
View article: Single‐Asperity Friction and Wear in Seismic Faults: 1. Experiments on Marble
Single‐Asperity Friction and Wear in Seismic Faults: 1. Experiments on Marble Open
Common representations of seismic faults often fall into two categories. Either the model focuses on clean rough surfaces in sliding contact, or the model focuses on the gouge production and shearing between two smooth surfaces. In this wo…
View article: Single‐Asperity Friction and Wear in Seismic Faults: 2. DEM Simulations
Single‐Asperity Friction and Wear in Seismic Faults: 2. DEM Simulations Open
Seismic faults are rough, and their geometrical complexity is an important research topic. In this work, we present a numerical model dedicated to the simulation of friction and wear in an idealized fault asperity, taking inspiration from …
View article: Experimental investigation on brake squeal unpredictability: Role of the friction noise
Experimental investigation on brake squeal unpredictability: Role of the friction noise Open
View article: A granular numerical model for the friction and wear of a lab-scale fault asperity
A granular numerical model for the friction and wear of a lab-scale fault asperity Open
Seismic faults are often represented using two different and self-excluding conceptual models. In the first representation, seismic faults are seen as the interface between two surfaces of bare rock, with a roughness extending at all scale…
View article: Evolution from a clean surface to a mature gouge interface in a seismic fault – asperity system through the lens of pin-on-disk experiments
Evolution from a clean surface to a mature gouge interface in a seismic fault – asperity system through the lens of pin-on-disk experiments Open
Understanding earthquakes mechanisms still represents a challenge, motivated by the large consequences of the numerous earthquakes occurring each year. A number of uncertainties remain concerning the complexity of the fault structure, the …
View article: Wear in Progress: How Third Body Flow Controls Surface Damage
Wear in Progress: How Third Body Flow Controls Surface Damage Open
Mechanical contacts in dry conditions are often characterized by an interfacial layer called “third body”, which generally originates from the degradations of the surfaces, but which can exhibit strongly different material properties. This…
View article: Friction Mechanisms of Ni-Based and Zr-Based Bulk Metallic Glasses Under Different Contact Pressures
Friction Mechanisms of Ni-Based and Zr-Based Bulk Metallic Glasses Under Different Contact Pressures Open
View article: Investigation of third body role in dry contacts: Experimental procedure to dissociate the effects of substrate and interface layer on the contact pair frictional response
Investigation of third body role in dry contacts: Experimental procedure to dissociate the effects of substrate and interface layer on the contact pair frictional response Open
This paper presents an experimental approach for the evaluation of the third body role in dry contacts. The ultrasonic cleaning is applied to remove the third body layer from a contact sample pair, allowing to perform frictional tests with…
View article: Mechanical white etching layer formation kinetics in pearlitic steels: A phenomenological model based on microstructural characterization
Mechanical white etching layer formation kinetics in pearlitic steels: A phenomenological model based on microstructural characterization Open
View article: Development of Temperature-Controlled Shear Tests to Reproduce White-Etching-Layer Formation in Pearlitic Rail Steel
Development of Temperature-Controlled Shear Tests to Reproduce White-Etching-Layer Formation in Pearlitic Rail Steel Open
The formation of a white etching layer (WEL), a very hard and brittle phase on the rail surface, is associated with a progressive transformation of the pearlitic grain to very fragmented grains due to the cumulative passage of trains. Its …
View article: High Performance Space Lubrication of MoS<sub>2</sub> with Tantalum (Adv. Funct. Mater. 20/2022)
High Performance Space Lubrication of MoS<sub>2</sub> with Tantalum (Adv. Funct. Mater. 20/2022) Open
Space Lubricants In article number 2110429, Aurélien Saulot, Tobin Filleter, Guillaume Colas, and co-workers engineer a high-performance space lubricant for the extreme environments faced by spacecrafts. The co-deposition of MoS2 with tant…
View article: Characterization of the Microstructure Changes Induced by a Rolling Contact Bench Reproducing Wheel/Rail Contact on a Pearlitic Steel
Characterization of the Microstructure Changes Induced by a Rolling Contact Bench Reproducing Wheel/Rail Contact on a Pearlitic Steel Open
Understanding the effects of wheel-rail contact on the microstructure of rails is an important issue for railway management. The impact of wheel-rail contact and surface preparation on the microstructure of rails is studied using a rolling…
View article: How vorticity and agglomeration control shear strength in soft cohesive granular flows
How vorticity and agglomeration control shear strength in soft cohesive granular flows Open
View article: High Performance Space Lubrication of MoS<sub>2</sub> with Tantalum
High Performance Space Lubrication of MoS<sub>2</sub> with Tantalum Open
Molybdenum disulfide coatings have been employed as lubricants for spacecraft since the 1950s but continue to face major engineering challenges including performance in both terrestrial air and deep space vacuum environments and service li…
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: Experimental Analysis of Friction and Wear of Self-Lubricating Composites Used for Dry Lubrication of Ball Bearing for Space Applications
Experimental Analysis of Friction and Wear of Self-Lubricating Composites Used for Dry Lubrication of Ball Bearing for Space Applications Open
Lubricating space mechanisms are a challenge. Lubrication must be sustained in different environments, for a very long period of time, and without any maintenance possible. This study focuses on the self-lubricating composite used in the d…
View article: Detecting vorticity in cohesive deformable granular material
Detecting vorticity in cohesive deformable granular material Open
Numerical models of granular materials are useful in tribology, and can be used to predict wear and friction in contacts. DEM-like simulations are used to model particles of third-body, which are partly wear debris from rubbing bodies. It …
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: Thermomechanical modelling of the tribological surface transformations in the railroad network (white etching layer)
Thermomechanical modelling of the tribological surface transformations in the railroad network (white etching layer) Open
View article: Structure‐Dependent Wear and Shear Mechanics of Nanostructured MoS<sub>2</sub> Coatings
Structure‐Dependent Wear and Shear Mechanics of Nanostructured MoS<sub>2</sub> Coatings Open
Sputter‐deposited molybdenum disulfide coatings are one of the most common lubricants for extreme environments. However, their performance predictability remains limited by the complexity of van der Waals wear and shear mechanics in bulk m…
View article: Nanocrystalline MoS2 Wear Mechanics by Friction Force Microscopy
Nanocrystalline MoS2 Wear Mechanics by Friction Force Microscopy Open
View article: Modélisation thermomécanique de la formation de la phase blanche (White Etching Layer: WEL) associée à une Transformation Tribologique de Surface (TTS) dans le domaine ferroviaire
Modélisation thermomécanique de la formation de la phase blanche (White Etching Layer: WEL) associée à une Transformation Tribologique de Surface (TTS) dans le domaine ferroviaire Open
International audience
View article: Strength measurement and rupture mechanisms of a micron thick nanocrystalline MoS2 coating using AFM based micro-bending tests
Strength measurement and rupture mechanisms of a micron thick nanocrystalline MoS2 coating using AFM based micro-bending tests Open
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: Adhesion measurements in MOS2 dry lubricated contacts to inform predictive tribological numerical models : comparison between laboratory-tested samples and ball bearings from the niriss mechanism
Adhesion measurements in MOS2 dry lubricated contacts to inform predictive tribological numerical models : comparison between laboratory-tested samples and ball bearings from the niriss mechanism Open
International audience
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: Work of Adhesion Measurements of MoS<sub>2</sub> Dry Lubricated 440C Stainless Steel Tribological Contacts
Work of Adhesion Measurements of MoS<sub>2</sub> Dry Lubricated 440C Stainless Steel Tribological Contacts Open
The tribological behavior of dry lubricants depends on their mechanical and physicochemical environment, making it difficult to predict in practice. Discrete Element Method‐based modeling has been one successful approach to provide valuabl…
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…