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POUYA Ahmad

Professor
Tel : (+33) 1 64 15 35 65
Fax : (+33) 1 64 15 35 62
Office B108






Research Interests

  • Numerical modelling of thermo-hydro-mechanical couplings in gematerials and rock masses
  • Upscalling of hydro-mechanical proprties of fractured media
  • Elastic anisotropy
    Applications :
    - Stabillity of rock masses
    - Underground nuclear waste disposal
    - Underground storage of gas and oil in rock salt
    - Geological sequestration of CO2 / Oil reservoirs

Teaching activities

  • Since 1994 : Ecole des Ponts Paris Tech (www.enpc.fr) : Continuum Mechanics, Rock Mechanics and Tunnels
  • Since 1991 : Ecole Polytechnique (www.polytechnique.fr) : Experimental Mechanics, Soil and Rock Mechanics, Underground Openings
  • Since 1993 : University of Paris XI (Orsay) (www.sciences.u-psud.fr) : Rock Mechanics for Engineering Geology
  • 1994-1998 : Ecole Nationale Supérieur des Techniques Avancées (www.ensta.fr) : Elastic beams and shells, Buckling
  • 1993-1998 : University Paris-Est (www.univ-mlv.fr) : Continuum Mechanics, Elasticity, Plasticity, Damage theory

Education

  • May 1998 : Habilitation to supervise graduate research work, awarded by Paris-Est (Marne-la-Vallée) University.
  • Oct. 1991 : Doctor, Ecole des Ponts Paris Tech (ENPC), Paris, France ; doctoral thesis entitled : "Mechanical Behaviour of Rock salt - Application to Underground Openings".
  • July 1987 : M. Sc. in Solid Mechanics (ENPC / Paris 6 University).
  • Jan. 1984 : B. Sc. Civil Engineering, ENPC, Paris
  • June 1978 : Baccalaureate in Math. and Phys. , Adab High School, Esfahan (First rank in general competitive examination of Iranian universities in section Math-Phys.)

Poistions

  • Since 2010 : Senior Scientist, UR Navier, Ecole des Ponts ParisTech
  • 2002- 2010 : Senior Scientist, Laboratoire Central des Ponts et Chaussée, Paris
  • 1986-2002 : Researcher, Laboratory of Solid Mechanics, Ecole Polytechnique, Paris
  • 1984-1986 : Research Engineer, CNET-HLM (National Center of Technical Studies for home construction)

Expertise & Consulting

  • ANDRA (French Agancy for Nuclear Waste Disposal) : Determination of the cause of failure in a concrete structure (Centre de l’Aube), (2007-2008).
  • OSEO (French Agency for Industrial Innovation) : Expertise of innovation projects in the domain of civil and mechanical engineering (2005-2010).
  • USEK (Holy Spirit University of Kaslik - Lebanon) : Methods for numerical modelling of masonry structures (2009).

Publications :

International Journals :

  • A24 A. Pouya, “Three-dimensional flow in fractured porous media : a potential solution based on singular integral equations”, Advances in Water Resources 35 (2012) 30–40.
  • A23 A. Pouya, “Ellipsoidal anisotropy in linear elasticity : approximation models and analytical solutions”, International Journal of Solids and Structures 48 (2011) 2245–2254 .
  • A22 K. Maleki, A. Pouya « Numerical simulation of damage–Permeability relationship in brittle geomaterials », Computers and Geotechnics 37 (2010) 619–628.
  • A21 A. Pouya, S. Ghabezloo « Flow Around a Crack in a Porous Matrix and Related Problems », Transport in Porous Media (2010), Transp Porous Med, 84:511–532.
  • A20 A. Pouya, F. Elmi, E. Bourgeois, P. Bémani, « Joint Elements in the Finite Element code CESAR-LCPC, Application to fractured media and to interface problems », Revue Française de Géotechnique, 2009 (in press).
  • A19 A. Pouya, O. Fouché, “Permeability of 3D discontinuity networks : New tensors from boundary-conditioned homogenisation”, Advances in Water Resources 32 (2009) 303–314.
  • A18 A. Pouya, “Green’s function for materials with ellipsoidal anisotropy”, C.R. Mécanique 335 (2007) 407-413.
  • A16 A. Pouya, “Green’s function solution and displacement potentials for Transformed Transversely Isotropic materials”, Eur. J. Mech. A/Solids 26 (2007) 491-502.
  • A17 A. Pouya, Ch. Leonard, P. Alfonsi, “Modelling a viscous rock joint activated by rainfall : Application to the La Clapière landslide”, International Journal of Rock Mechanics and Mining Sciences 44 (2007) 120-129.
  • A15 A. Pouya “Ellipsoidal anisotropies in linear elasticity - Extension of Saint Venant’s work to phenomenological modelling of materials”, Int. Journal of Damage Mechanics. Vol. 16, January 2007, pp. 95-126.
  • A14 Ch. Leonard, A. Pouya, P. Alfonsi, “Application d’un modèle de joint frottant visqueux activé par la pluie au glissement de La Clapière”, Bulletin des Laboratoires de Ponts est Chaussées, n° 263-264, juil/aout/sep (2006), pp 71-83.
  • A13 A. Pouya, A. Zaoui, “A transformation of elastic boundary value problems with application to anisotropic behavior”, Int. Journal of Solids and Structures , 43 (2006) 4937-4956.
  • A12 A. Pouya, « Equivalent permeability tensors of a finite heterogeneous block » , C.R. Géosciences, 337 (2005) 581-588.
  • A11 A. Pouya, « A constitutive inequality in plasticity involving left-hand and right-hand rates », International Journal of Plasticity, ,20 (2004) 1251-1279.
  • A10 A. Pouya, A. Courtois « Definition of the permeability of fractured rock masses by homogenisation » , C.R. Géosciences, 334 (2002) 975-979.
  • A9 A. Pouya “Micro-macro approach for the rock salt behaviour”, Eur. J. Mech. A/Solids 19 (2000) 1015-1028.
  • A8 A. Pouya « A transformation of the problem of linear elastic structure for application to the inclusion problem and to Green functions », Comptes-Rendus de l’Académie des Sciences de Paris, t. 328, Série II b, p. 437-443, 2000.
  • A7 A. Pouya, M.Ghoreychi “Determination of rock mass strength properties by homogenisation”, Int. J. Numer. Anal. Meth. Geomech., 25, (2001), 1285-1303.
  • A6 A. Pouya, A. Zaoui « Linearisation and homogenization for viscoelastic materials », Comptes-Rendus de l’Académie des Sciences de Paris, t. 327, Série II b, p.365-370, 1999.
  • A5 X. Luo, A.Pouya, V. Lamoureux-Var, A. Poliakov, G. Vasseur, “Elastoplastic deformation of porous media applied to the modelling of the compaction at the basin scale”, Marine and Petroleum Geology, 15, (1998), 145-162.
  • A4 A. Pouya, I. Djéran-Maigre, V. Lamoureux-Var, D. Grunberger, “Mechanical behaviour of fine grained sediments : experimental compaction and three-dimensional constitutive model”, Marine and Petroleum Geology, 15, (1998), 129-143.
  • A3 Pouya A., “A constitutive inequality in plasticity involving left-hand and right-hand rates”, Comptes-Rendus de l’Académie des Sciences de Paris, t. 320, Série Il b, p. 557-562, 1995.
  • A2 Pouya A., “Deformation of multipotential elastoplastic solids : inequalities verified by stress and strain rate discontinuities”, Comptes-Rendus de l’Académie des Sciences de Paris, t. 316, Série II, p. 1511-1516, 1993.
  • A1 Nguyen Minh D. & Pouya A., “A framework for the analysis of underground excavations in viscoplastic medium, on account of a steady stress state”, Revue Française de Géotechnique, n° 59, Avril 1992, pp. 5-14.

Congress Papers :

  • C21 M. Bost, A. Pouya, “Model of the stress generated by freezing-thawing in rock cracks”, 5th Asian Rock Mechanics Symposium, Tehran, Iran, November 2008
  • C20 P. Bemani Yazdi, A. Pouya, “A Coupled Normal-Shear Damage Model for Rock Joint Elements”, 5th Asian Rock Mechanics Symposium, Tehran, Iran, November 2008
  • C19 A. Pouya, M. Chalhoub « Numerical homogenization of elastic behavior of fractured rock masses and micro-cracked materials by FEM », The 12th International Conference of IACMAG, GOA, India, October 2008
  • C18 A. Pouya, M. Chalhoub « Ellipsoidal anisotropy in elasticity for rocks and rock masses », Proceedings of the 11th Cong. of the Int. Society for Rock Mech. (ISRM2007, Lisbon, Portugal, 9-13 July), Ribeiro e Sousa Editor, Taylor & Francis (2007), Vol. 1, pages 251-254.
  • C17 M. Bost, A. Pouya, F. Martineau, « Effets mécaniques du gel sur l’évolution d’une fissure dans un bloc de calcaire », Journées Nationales de Géotechnique et de Géologie de l’Ingénieur 2006, 27-29 juin 2006, INSA Lyon , III-Risques naturels en zone montagneuse, p. 153-160.
  • C16 M. Chalhoub, A. Pouya “A geometrical approach to estimate the mechanical REV of a fractured rock mass”, First Euro Mediterranean Congress in Advances on Geomaterials and Structures, Hammamet, Tunisia, 3-5 May 2006, pp 663-670.
  • C15 F. Elmi, E. Bourgeois E., A. Pouya, C. Rospars, Elastoplastic joint element for the FE analysis of the Hochstetten sheet pile wall”, NUMGE06, Sixth European Conference on Numerical Methods in Geotechnical Engineering, Graz, Austria, 6-8 September 2006
  • C14 Ghabezloo, S. , Pouya, A. “Numerical modelling of weathering on the progressive failure of underground limestone mines”, Eurock 2006, Multiphysics Coupling and Long Term Behaviour in Rock Mechanics, Taylor & Francis Group, London 2006, p. 233-240.
  • C13 Pouya A., Courtois A., Kun S. « Estimation numérique des propriétés hydromécaniques d’un granite », Colloque International de Géotechnique, Université Libanaise, mai 2004, Beyrouth.
  • C12 Pouya A., Reiffsteck Ph., « Fundamental solutions for foundations on anisotropic elastic soils », International Symposium on Shallow Foundations (FONDSUP 2003), Presses des Ponts et Chaussées, Paris, 2003, p. 415-422.
  • C11 Maleki K., Pouya A., Courtois A. et Su K., “ Modélisation numérique du couplage entre l’endommagement et la perméabilité des argiles raides “, 16ème Congrès Français de Mécanique, Nice, 1-5 septembre 2003.
  • C10 Pouya A., “Anisotropies de Saint Venant en élasticité linéaire“, 6ème Congrès Marocain de Mécanique, Faculté des Sciences et Techniques de Tanger, Maroc, 15-18 avril 2003.
  • C9 Poszwa A.C., Coleman M.L., Pouya A., Ader M., Bounenni A., “Variation of brine composition resulting from matrix or fracture permeability, investigated by high pressure laboratory experiments“, Congress of Geophysical Society, in Geophysical Research Abstracts, Vol. 5, 04597, 2003
  • C8 Pouya A., Ghoreychi M., “Determination of strength properties of rock masses by homogenisation “, 4th European conference on numerical methods in geotechnical engineering, Udine (Italy) October 1998
  • C7 H. G.M. Eggenkamp, A. Pouya, M. Coleman, “Can diffusion and shale compaction be causes of chlorine isotope fractionation in basinal brines ? “, Geofluids II Conference, Belfast, 10 à 14 Mars 1997.
  • C6 L. Thorel, A. Pouya, M. Ghoreychi, « Modélisation micro-macro autocohérente du comportement du sel gemme. Comparaison avec l’expérience de laboratoire », 3ème Colloque du Groupe Français de Rhéologie, Metz, France, Octobre 1996.
  • C5 K. Su, M. Ghoreychi, F. Coste, A. Pouya, “Modeling of thermo-hydro-mechanical couplings in fractured media - Application for deep geothermal”, The 8th Internationnal Congress on Rock Mechanics, Septembre 1995, Tokyo, Japan
  • C4 Pouya A., Zaoui A., Nabouli M., “A Micro-Macro Model for Polycrystaline Halite”, Third Conf. on the Mechanical Behavior of Salt”, Ecole Polytechnique, Palaiseau, France, Sept. 1993.
  • C3 Pouya A., “Internal Stresses in NaCl Polycristals”, International Seminar on Micromechanics of Materials (Mecamat 93), Université Paris Nord, Editions Eyrolles, Paris, p. 339-345, July 1993.
  • C2 Pouya A., « Approche micro-mécanique de l’initiation de la fissuration du sel gemme », The 7th Internationnal Congress on Rock Mechanics, Aachen, September 1991. pp. 319-322.
  • C1 Pouya A., “Correlation between mechanical behaviour and petrological properties of rock salt”. 32nd U.S. Symposium on Rock Mechanics, University of Oklahoma, July 1991, pp. 385-392.

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