Fatu Aurelian

Professor
firstname.lastname@univ-poitiers.fr

CNRS-Université de Poitiers-ISAE ENSMA
11 Boulevard Marie et Pierre Curie
Téléport 2, BP 30179
86962 Futuroscope Cédex
France

Research Team

Mécanique des Interfaces Lubrifiées
Génie Mécanique et Systèmes Complexes

Research


Dynamically loaded compliant bearings: direct application to internal combustion engine lubricated contacts

Numerical skills:

  • hydrodynamic, hydrostatic and hybrid lubrication modelling,
  • multi-physic analysis ⇒ TEHD models,
  • roughness characterization and mixed lubrication modelling,
  • texturing and wall slip modelling,
  • two dedicated software: ACCEL (Analysis and Computing of Elastic Lubricated Contacts) and ACEVIM (Analysis and Computing of Elastic crank shaft bearings).

MEGAPASCALE experimental test bench: experimental investigation of big-end connecting-rod bearings

Highly compliant (elastomer) dynamic seals: rotary (lip seals) and reciprocating (hydraulic) seals

Numerical skills:

  • mechanical non-linear modelling of the elastomer elastic behaviour,
  • multi-physic analysis ⇒ EHD models,
  • roughness characterization and mixed lubrication modelling.

Rotary lip seal test bench: friction torque and temperature measurements

Teaching


  • Solid mechanics,
  • Strength of materials and structures,
  • Finite elements modelling,
  • Mathematics and numerical analysis.

Selected publications


Fatu A., Habilitation à Diriger les Recherches: “Etude numérique et expérimentale des paliers de moteur thermique et des joints d’étanchéité dynamique“, University of Poitiers, 2013.

Books

1)   Bonneau D. Fatu A., Souchet D., ” Hydrodynamic Bearings“, ISTE Ltd and John Wiley & Sons, Inc., 2014, ISBN 978-1-84821-681-5 , 191 pages.

2)   Bonneau D. Fatu A., Souchet D., “Mixed Lubrication in Hydrodynamic Bearings“, ISTE Ltd and John Wiley & Sons, Inc., 2014, ISBN 978-1-84821-682-2, 184 pages.

3)   Bonneau D. Fatu A., Souchet D., “Internal Combustion Engine Bearings Lubrication in Hydrodynamic Bearings“, ISTE Ltd and John Wiley & Sons, Inc., 2014, ISBN 978-1-84821-684-6, 225 pages.

4)   Bonneau D. Fatu A., Souchet D., “Thermo-hydrodynamic Lubrication in Hydrodynamic Bearings“, ISTE Ltd and John Wiley & Sons, Inc., 2014, ISBN 978-1-84821-683-9, 154 pages.

5)   Bonneau D. Fatu A., Souchet D., ” Paliers hydrodynamique : équations, modèles numériques isothermes et lubrification mixte”, Lavoisier 2011, ISBN 978-2-7462-3299-0, ISSN 1952-286X, 398 pages.

6)   Bonneau D. Fatu A., Souchet D., ” Paliers hydrodynamique : modèles thermohydrodynamiques, calcul des paliers de moteur et de compresseur“, Lavoisier 2011, ISBN 978-2-7462-3299-0, ISSN 1952-286X, 372 pages.

Fluid film bearings

1)   Lavie T., Francisco A., Fatu A., Villechaise B., “Multi-objective optimization of conrod big-end bearing lubrication using an evolutionary algorithm“, Tribology Transactions, Accepted author version posted online: 09 Oct 2014

2)   Coblas D., Fatu A., Maoui A., Hajjam M., “Manufacturing textured surfaces: State of art and recent developments“, IMechE Part J. Journal of Engineering Tribology, 229, pages 3-29, 2015.

3)   Gherca A., Fatu A., Hajjam M., Maspeyrot P., “Influence of surface geometry on the hydrodynamic performances of parallel bearings in transient flow conditions” Tribology Transactions, 56(6), pages 953-967, 2013.

4)   Francisco A., Lavie T., Fatu A., Villechaise B., “Metamodel-Assisted optimization of connecting rod big-end bearings“, ASME Journal of Tribology, 135(4), 041704-1, 2013

5)   Fatu A., Bonneau D., Fatu R., ” Computing hydrodynamic pressure in mixed lubrication by modified Reynolds equation “, IMechE Part J, Journal of Engineering Tribology, 226(12), pages 1074-1094, 2012

6)   Gherca A., Maspeyrot, P., Hajjam, M., Fatu, A., “Influence of Texture Geometry on the Hydrodynamic Performances of Parallel Bearings “, Tribology Transactions, 56(3), pages 321-332, 2013

7)   Fatu A., Maspeyrot P., Hajjam M., ” Wall slip effects in (elasto) hydrodynamic journal bearings“, Tribology International, Volume 44, Issues 7-8, Pages 868-877, 2011.

8)   Fatu A., Riche I., Bonneau D., ” A Finite-Element Local Mesh Refinement Model For Treating Mixed-Lubrication in Conrod Bearings “, Int. J. Surface Science and Engineering, Vol. 4, No. 2, 2010.

9)   Francisco A., Fatu A., Bonneau D., ” Using Design of Experiments to Analyze the Connecting Rod Big-End Bearing Behavior“, “, ASME Journal of Tribology, Vol. 131, January 2009.

10)             Michaud P., Fatu A., Villechaise B., “Experimental device for studying real connecting-rod bearings functioning in severe conditions “, ASME Journal of Tribology, Vol. 129, pp. 647-654, 2007.

11)             Fatu A.,Hajjam M., Bonneau D., “A New Model of Thermoelastohydrodynamic Lubrication in Dynamically Loaded Journal Bearings “, ASME Journal of Tribology, Vol. 128, pp. 85-95, 2006

12)             Fatu A., Hajjam M., Bonneau D., “An EHD Model to Predict the Interdependent Behaviour of Two Dynamically Loaded Hybrid Journal Bearings“, ASME Journal of Tribology, Vol 127, pp. 416-424, 2005.

13)             Fatu A., Hajjam M., Bonneau D., “Analysis of Non-Newtonian and Piezoviscous Effects in Dynamically Loaded Connecting-Rod Bearings“, IMechE Part J, Journal of Engineering Tribology, Vol. 219, pp. 209-224, 2005

14)             Fatu A., Hajjam M., Bonneau D., “A Fast Thermoelastohydrodynamic Model for Dynamically Loaded Journal Bearings Behaviour Analysis“, Revue Européenne des Eléments Finis, Vol. 14, pp. 237-253, n° 2-3/2005.

C.1.Gherca, A., Fatu, A., Maspeyrot, P., Hajjam, M., “Numerical investigation on the effects of surface geometry in transient flow conditions“, World Tribology Congress 2013, 4 pages, September 8-13, 2013, Torino, Italy

C.2.Fatu A.,Hajjam M., “New averaged Reynolds equation based on wall slip boundary conditions“, 40th Leeds-Lyon Symposium on Tribology & Tribochemistry, Forum 2013, 1 page, September 4-6, 2013, Lyon, France

C.3.Fatu A., Bonneau D., “Wear prediction in connecting-rod bearings during running-in and transient speed conditions“, STLE/ASME International Joint Tribology Conference, paper reference: IJTC2010-41166, 3 pages October 2010, San Francisco, California, USA

C.4.Nguyen T.L., Fatu A., Souchet D., “Etude du contact entre le coussinet et le logement dans un palier de tête de bielle“, 21ème Congres Française de Mécanique, août 2013, Bordeaux, France.

C.5.Fatu A., Bonneau D., “Wear prediction models for automotive bearings”, 7th EDF/LMS Poitiers Workshop, 7 pages, 2 october 2008, Poitiers, France.

C.6.Fatu A.,Bonneau D., “EHD Lubrication of Multi-Body Common-Pin Conrod Big End Bearings System“, STLE/ASME International Joint Tribology Conference, 3 pages, October 22-24, 2007, San Diego, California, USA.

C.7.Michaud P., Fatu A., Villechaise B., “Experimental device for studying real connecting-rod bearings functioning in severe conditions “, ASME World Tribology Congress, 2 pages, septembre 2005 Washington DC.

Dynamic seals

1)   Crudu M., Fatu A., Hajjam M., Cristescu C. “Numerical and experimental study of reciprocating rod seals including surface roughness effects“, Sealing Technology, pages 8-11, June 2013.

2)   Crudu M., Fatu A., Cananau S., Hajjam M., Pascu A., Cristescu C., ” A numerical and experimental friction analysis of reciprocating U rod seals“, IMechE Part J, Journal of Engineering Tribology, 226(9), pages 785-794, 2012.

3)   Fatu A., Hajjam M., ” Numerical modeling of hydraulic seals by inverse lubrication theory“, IMechE Part J, Journal of Engineering Tribology, Vol. 255, pp 1159-1173, 2011.

4)   Crudu M., Fatu A., Hajjam M., Pascu A., Cananau S., “Influence of certain parameters on the modeling of the behavior of hydraulic “U” seals“, UPB Scientific Bulletin, Series D: Mechanical Engineering, 73(4), pages 99-110, 2011

5)   Fatu A., Tournerie B., Cicone T., ” Etude paramétrique des joints d’étanchéité a faces radiales au cours de démarrage, en utilisant un modèle TEHD 1-D “, Mécanique & Industries, Vol. 6, N° 6 pp. 615-623, 2005.

C.1.Elgadari M., Fatu A., Hajjam M., Zerbane K., Belhaq M., “About numerical modelling of rotary lip seal” 2012 STLE Annual Meeting & Exhibition, 3 pages, May 6-10, 2012, St. Louis, Missouri, USA.

C.2.Fatu A.,Chiad M., Hajjam M., “Numerical and experimental investigation of a PTFE-lip seals with spiral groove “, 2012 STLE Annual Meeting & Exhibition, 3 pages, May 6-10, 2012, St. Louis, Missouri, USA.

C.3.Chiad M., Fatu A., Hajjam M. “Experimental study of PTFE-lip seals with spiral grooves“, 21st International Conference on Fluid Sealing, paper reference: BHR_N°26, pages 227-235(8 pages),  November 2011 Milton Keynes UK

C.4.Chiad M., Fatu A., Hajjam M. “Static Analysis of PTFE spiral groove ring seal“, 8th EDF/LMS Poitiers Workshop, 7 pages, 2 october 2009, Poitiers, France

C.5.Fatu A.,Tournerie B., Cicone T., ” Modèle Unidimensionnel des Effets Thermiques Transitoire dans un Joint d’Etanchéité à Faces Radiales au Démarrage“, 16ème Congres Française de Mécanique, septembre 2003, Nice.