Benoît Omnès- Doctor of Engineering
- Sealing fellow Expert at Technical Centre for Mechanical Industry
Benoît Omnès
- Doctor of Engineering
- Sealing fellow Expert at Technical Centre for Mechanical Industry
Fellow Expert (Sealing)
About
32
Publications
3,669
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Citations
Introduction
Benoît OMNES is a Doctor of engineering science, specialized in mechanical of material, and he is working as a project manager in Cetim (Technical Centre of Mechanical Industries), in Nantes. He had employed in the Sealing Technologies department to develop the activities of the static sealing applications which use rubber parts. The aim was to predict tightness performances for industrials application and for different research subjects.
Current institution
Additional affiliations
September 2007 - present
Position
- Sealing senior Expert
Description
- Since 2007, Benoît has been specialized himself to understand the behaviour of the seals in harsh conditions (high pressure, extreme temperature, friction, ageing etc.). To improve the knowledge, Benoît led collaborative projects with private laboratories and academic universities to carry out research on the tightness with elastomer parts. Some experimental and numerical approaches were established in order to link between mechanical behaviour and tightness performance.
May 2020 - January 2022
Position
- Sealing senior expert
Description
- Currenlty, I am Sealing Senior Expert of Cetim (Technical Institute of the French mechanical industry). My field expertise is focused on the sealing performance integrating materials and service conditions. I am specialized on rubber material and he takes over different material in my scope like polymers, graphite, metallic material, in recent years. I had led many experimental and numerical projects for sealing applications in O&G, Nuclear, New energies and other fields. I manage the technica
Education
September 2004 - September 2007
September 2000 - September 2004
September 1998 - September 2000
Publications
Publications (32)
Monitoring and predicting the ageing of industrial systems equipped with sealing products implies the necessity to ensure tightness. This functional performance is difficult to control due to the combined effects of the viscoelastic nature of the materials of interest and the heterogeneous material evolution due to ageing. Interfacial leakage may a...
Despite its importance in the sealing field, fundamental knowledge of the behavior of elastomer O-rings in a gaseous environment still needs to be completed. It is essential to identify the behavior of the O-ring under the coupled effect of sorption (i.e. swelling) under the effect of carbon dioxide (CO2) and temperature to carry out predictive num...
Ce poster présente une partie des travaux de thèse menés sur l'amélioration des outils de prédiction de durée de vie appliqués aux joints toriques élastomères. Des travaux ont été entrepris pour identifier les évolutions de propriétés mécaniques locales dans la section des joints. Des mesures par nanoindentation ont été réalisées sur le matériau ne...
La fonction étanchéité est au cœur des préoccupations actuelles visant à réduire les niveaux d'émissions en fonctionnement normal et les risques de fuite accidentelle, pour des raisons sécuritaires, environnementales et économiques. La connaissance des différentes technologies disponibles est importante, afin de sélectionner la solution la plus ada...
To investigate the life prediction and the impact of ageing on elastomer seals, the Elastomeric & Polymeric Seals Division of the European Seal Association (ESA) initiated a new study in 2019
https://valve-world.net/arrhenius-seal-life-prediction-project-results-and-analysis/
the improvement of knowledge about extrusion resistance of rubber seal under high pressure is necessary to manage the risks of sealing performance in harsh conditions. In this paper, Cetim and LRCCP present their new investigations to understand extrusion failure under high hydrostatic pressure, on two refer-ences 21B6 (NBR) and 61D6 (FVMQ). Some c...
A better understanding of elastomers’ behavior during Rapid Gas Decompression (RGD) requires advanced knowledge of what is happening during gas sorption and desorption. This will offer to improve numerical simulation phenomena to consider a real environmental use of an O-ring, as for thermal applications. A previous experimental study developed tes...
To make use of an O-ring under different pressures and temperatures and to procedure predictive numerical simulations of its use, it becomes important to identify the O-ring behavior under coupled CO2 sorption (i.e. swelling) and desorption (i.e. shrinking) together with the effect of temperature. Therefore, the presented study deals with an experi...
The aim of this study is to improve knowledge on the incompressibility and on the extrusion resistance of rub-ber seals. Under hydrostatic pressure, some irreversible damages may appear on the elastomer seals due to ex-trusion in the space gap, created by component design or dimensional tolerances. Cetim carried out an analysis of experimental resu...
Despite its importance in sealing, a fundamental understanding of the behavior of elastomeric O-rings in a gas environment is still incomplete. Further experimental research is needed to obtain a precise predictive model which can describe the combined effects of gases and mechanical loading. The effect of CO 2 pressure (2, 4 and 6 MPa) on the mech...
Sealing products can undergo many different atmospheric conditions and hence large variations in the in-service temperatures. These products, typically made of elastomer, are known to have heat sensitive mechanical characteristics. Since the reliability of sealing systems can be affected by cyclic temperature conditions, it is essential to predict...
https://hal.archives-ouvertes.fr/hal-03465358/document
Avec des réglementations de plus en plus strictes, les enjeux environnementaux deviennent une priorité pour les industries. L'un des aspects primordiaux pour limiter l'impact environnemental est la réduction des émissions fugitives, rencontrées entre autres, dans les organes de robinetterie de...
In order to improve the sealing performances of porous braided packing rings, an experimental study is currently performed on a dedicated device. This device has been specially designed to measure the stresses during cyclic loading tests with compressed exfoliated graphite valve packing. Indeed, different tests which reproduce the opening and closi...
Ce rapport a été envisagé comme un outil à destination des professions des transmissions hydrauliques et pneumatiques afin de synthétiser les principaux éléments de conception sur le "comportement mécanique des joints toriques". Dans ce rapport, plusieurs thèmes liés à la modélisation des élastomères sont abordés, de même que sont reportés des élém...
La présente invention concerne une méthode et une installation de mesure (10) pour mesurer la résistance mécanique d'un corps creux présentant une paroi interne (15) et deux extrémités opposées (13, 11). L'installation de mesure comprenant : un corps déformable (26) introduit à l'intérieur dudit corps creux (12) ; deux éléments d'obturation (18, 24...
L'objectif de cette étude est de caractériser le comportement mécanique d'éléments d'étanchéité de type Presses-Garnitures (PG) rencontrés dans de nombreux systèmes de robinetterie de sécurité sous forme de Packings, composés d'empilement de tresses ou de bagues à base de PTFE ou de graphite. Le dimensionnement de la fonction d'étanchéité de ces PG...
Un dispositif de raclage (11) pour un compresseur alternatif, comprenant : un élément de bague (14) destiné à être monté sur une tige (10) et définissant un premier logement (18), fermé, pour recevoir un élément d'étanchéité déformable (12), de sorte que ledit élément d'étanchéité déformable appuie contre la tige, et un élément de support (13), apt...
On s'intéresse à la détermination de la perméabilité intrinsèque k et du coefficient de Klinkenberg b de matériaux très peu perméables. Après analyse des différentes méthodes, une technique instationnaire de relaxation d'un pulse de pression de gaz (Draw-Down) est retenue au vu de la sensibilité optimale du signal de pression à k et b. Des mesures...
In this work, we address the issue of sealing performance of ring-shape valves compression packings. Our analysis is focused on the characterization of the permeabilty of the rings made of die-formed exfoliated graphite. Because of the tight character of the material, significant Klinkenberg effects are expected. In addition, due to the manufacturi...
Anti-vibrating parts in automotives are often made of natural rubber reinforced by carbon black. This reinforcement, which comes from the filler–filler and filler–rubber interactions, leads to an increase of the elastic modulus, the tensile strength and the hysteresis. The aim of this work is to develop a model within a generalized self-consistent...
La motivation de cette étude est de développer un modèle de comportement micromécanique d'élastomères constitués d'une matrice de caoutchouc naturel chargée de noir de carbone, dans le domaine des déformations modérées. L'objectif est de pouvoir prendre en compte la fraction volumique et la surface spécifique du noir de carbone et d'intégrer la loi...
The mechanical behaviour of a filled elastomer composed mainly of natural rubber reinforced by carbon black is investigated in the moderate elongation range, i.e. |Ε | < 0.4 in tension, compression and shear. Two types of carbon blacks, with different specific surfaces, are considerate. A micromechanical model is developed within a generalized self...
The aim of this study is to conduct experimental characterization and to develop a micro-mechanical model for thermoplastic elastomers made of polypropylene and particles of rubber waste. Observations by means of Scanning Electron Microscope showed that the elastomer particles have an average dimension of 250 μm and are embedded in a polypropylene...
