Ioan R. IONESCU

Professor/Professeur

 

 

 

Address/Coordonnées    Résumé/CV       Conferences/Conférences      Publications     Teaching/Enseignement

 

Publications


O. Cazacu, I. R. Ionescu, Dynamic crystal plasticity: an Eulerian approach, Journal of Mechanics and Physics of Solids (2010) in press

I.R. Ionescu and E. Oudet, Discontinuous velocity domain splitting in limit analysis, Int. J. Solids and Structures, (2010) in press, doi:10.1016/j.ijsolstr.2010.02.012

O. Cazacu, I. R. Ionescu and J.-W. Yoon, Orthotropic strain rate potential for the description of anisotropy in tension and compression of metals, International Journal of Plasticity, (2010) in press, doi:10.1016/j.ijplas.2009.11.005

S. Hok, M. Campillo, F. Cotton, P. Favre and I.R. Ionescu, Off-fault Plasticity Favors the Spontaneous Arrest of Dynamic Ruptures on Strength Heterogeneity : the 2D In-plane and Anti-plane Cases, Geophysical Research Letters, (2010) in press, doi:10.1029/2009GL041888

K. Uenishi and I. R. Ionescu, On the dynamic interaction between the ground and a group of structures subjected to seismic disturbances, COMPDYN 2009, ECCOMAS Thematic Conference on Computational Methods in Structural Dynamics and Earthquake Engineering, M. Papadrakakis, N.D. Lagaros, M. Fragiadakis (eds.)

D. Bresch, E. D. Fernandez-Nieto, I. R. Ionescu, P. Vigneaux, Augmented Lagrangian Method and Compressible Visco-Plastic Flows : Applications to Shallow Dense Avalanches, Advances in Mathematical Fluid Mechanics, New Directions in Mathematical Fluid Mechanics, Springer, (2009), 57-89

M. Ghergu and I.R. Ionescu, Structure-soil-structure coupling in seismicexcitation and "city effect", Int. Journal of Engng. Sciences, 47 (2009) 342--354

O. Cazacu and I. R. Ionescu, Dynamic Eulerian modeling of visco-plastic crystals, DYMAT 2009, Vol. 2, 1485--1490, DOI: 10.1051/dymat/2009210

I. R. Ionescu and D. Volkov, Detecting tangential dislocations on planar faults from traction free surface observations, Inverse Problems, 25, 1, (2009), 25 pages, PDF-file

I R. Ionescu and E. Oudet, Discontinuous velocity domain splitting method in limit analysis, X International Conference on Computational Plasticity, COMPLAS X (2009), E. Onate and D.R.J. Owen (Eds)

L. Badea, I. R. Ionescu and S. Wolf, "Schwarz method for earthquake source dynamics", Journal of Computational Physics 227 (2008) 3824–3848, PDF-file

O. Cazacu, I. R. Ionescu and T. Perrot, ”Numerical modeling of projectile penetration into compressible rigid visco-plastic media”, Int. J. Numer. Meth. Engng., 74, 8, 2008, 1240-1261

R. Hassani, I.R. Ionescu and E. Oudet, "Critical friction for wedged configurations", Int. J. of Solids and Structures, vol. 44 (2007), 6187-6200, PDF-file

O. Cazacu, I. R. Ionescu and T. Perrot, Numerical modeling of penetration into cementitious materials, COMPDYN 2007, ECCOMAS Thematic Conference on Computational Methods in Structural Dynamics and Earthquake Engineering, M. Papadrakakis, D.C. Charmpis, N.D. Lagaros, Y. Tsompanakis (eds.)

I. R. Ionescu and D. Volkov, ”Earth surface effects on active faults : depth eigenvalue analysis”, J. of Comp. Appl. Math. , 2007, in press , PDF-file

R. Hassani, I.R. Ionescu and E. N. Sakki, "Unstable perturbation of the equilibrium under Coulomb friction. Nonlinear eigenvalue analysis", Computer Methods in Appl. Mech. and Engrg, vol. 196 (2007), 2377--2389, PDF-file

D. Bucur and I.R. Ionescu, "Asymptotic analysis and scaling of friction parameters", Journal of Applied Mathematics and Physics (ZAMP), 57, 1042--1056, 2006, PDF-file

O. Cazacu, I. R. Ionescu and T. Perrot, "Steady-state flow of compressible rigid-viscoplastic media", Int. Journal of Engng. Sciences, vol 44 (2006), 1082-1097, PDF-file

O. Cazacu and I. R. Ionescu, "Compressible rigid visco-plastic fluids", Journal of Mechanics andPhysics of Solids, Vol. 54 (2006) Issue 8, 1640-1667, PDF-file

I. R. Ionescu and D. Volkov, "An inverse problem for the recovery of active faults from surface observations", Inverse Problems,vol. 22 (2006), 2103--2121 , PDF-file

S. Wolf, I. Manighetti, M. Campillo and I. R. Ionescu,"Mechanics of normal fault networks subject to slip weakening friction", Geophysical Journal, International, 165 (2), 677-691, 2006, PDF-file

R. Hassani, I. R. Ionescu and E. Oudet, "A genetic algorithm approach for wedged configurations with Coulomb friction", in Analysis and Simulation of Contact Problems, P. Wrigers and U. Nackenhorst (eds.), Lecture Notes in Applied and Computational Mechanics, vol. 27, 4th Contact Mechanics International Symposium, Hanovre 2005, 215--222

R. Hassani, I.R. Ionescu and T. Lachand-Robert, "Shape optimization and supremal minimization approaches in landslides modelling", Applied Mathematics and Optimization, vol. 52, 349--364, 2005, PDF-file

I. R. Ionescu, D. Onofrei and B. Vernescu, "$\Gamma$-convergence for a fault model with slip-weakening friction and periodic barriers", Quarterly of Applied Mathematics, vol. LXIII, 4, 747--778,2005, PDF-file

I.R. Ionescu and T. Lachand-Robert, "Generalized Cheeger's sets related to landslides", Calculus of Variations and PDE, vol. 23, 227--249, 2005, PDF-file

I.R. Ionescu and S. Wolf , "Interaction of faults under slip dependent friction. Nonlinear eigenvalue analysis", Mathematical Methods in the Applied Sciences (M2AS), Vol. 28, 77-100, 2005, PDF-file

R. Hassani, I. R. Ionescu, T. Lachand-Robert, "Optimization techniques in landslides modelling", 7ème colloque Franco-Roumain de Mathématiques Appliquées, 2004 Craïova (Roumanie), V. Radulescu (editor), to appear

L. Badea, I. R. Ionescu and S. Wolf, "Domain decomposition method for dynamic faulting under slip-dependent friction", Journal of Computational Physiscs, 201, (2004) 847-510, PDF-file

M. Campillo, C. Dascalu and I. R. Ionescu, ``Instability of a Periodic System of Faults'', Geophysical Journal, International, vol.159, 212-222, 2004, PDF-file

L. Badea, I. R. Ionescu and S. Wolf, "Schwarz decomposition method in capturing friction instabilities", ECCOMAS, Jyvaskyla, 24-28 July 2004, European Congress on Computational Methods in Applied Sciences and Engineering, P. Neittaanmaki, T. Rossi, S. Korotov, E. Onate, J. Périaux, and D. Knorzer (eds.), 1--16, 2004

C. Dascalu and I. R. Ionescu, "Slip weakening friction instabilities : eigenvalue analysis", Mathematical Models and Methods in Applied Sciences (M3AS), Vol. 14, No. 3, 439-459, 2004, PDF-file

O. Cazacu, I. R. Ionescu and T. Perrot, "Penetration of a rigid body into a visoplastic compressible fluid", ECCOMAS, Jyvaskyla, 24-28 July 2004, European Congress on Computational Methods in Applied Sciences and Engineering, P. Neittaanmaki, T. Rossi, K. Majava, and O. Pironneau (eds.) W. Rodi and P. Le Quéré (assoc. eds.), 1--18, 2004

R. Hassani, P. Hild and I. R. Ionescu, "Sufficient conditions of non-uniqueness for the Coulomb friction problem", Mathematical Methods in the Applied Sciences (M2AS), Vol. 27, No. 3, 47-67, 2004, PDF-file

I. R. Ionescu and S. Wolf, "Instability of interaction faults. Nonlinear eigenvalue analysis", ECCOMAS, Jyvaskyla, 24-28 July 2004, European Congress on Computational Methods in Applied Sciences and Engineering, P. Neittaanmaki, T. Rossi, S. Korotov, E. Onate, J. Périaux, and D. Knorzer (eds.), 1--14, 2004

H. Perfettini, M. Campillo and I. R. Ionescu, "Rescaling of the weakening rate", Journal of Geophysical Research, Vol. 108, No. B9, 2410, 2003, PDF-file

R. Hassani, P. Hild, I. R. Ionescu and N. Sakki, “A mixed finite element method and solution multiplicity for Coulomb frictional contact”, Computer Methods in Appl. Mech. and Engrg., vol. 192, 4517-4531, 2003, PDF-file

M. Campillo et I. R. Ionescu , Séismes : avant la secousse, La Recherche, No. 363, avril 2003, 53--58

I. R. Ionescu and V. Radulescu, "Nonlinear eigenvalue problems arising in earthquake initiation", Adv. Diff. Equations, Vol. 8, No. 7, 769-786, 2003,,PDF-file

I. R. Ionescu, Q.L. Nguyen and S. Wolf, ``Slip displacement dependent friction in dynamic elasticity'', Nonlinear Analysis, Vol. 53, No.3-4, 375--390, 2003, PDF-file

M. Campillo and I.R. Ionescu, "Séismes : avant la secousse", La Recherche, No. 363, avril 2003, 53--58, PDF.rar-file

I. R. Ionescu, C. Dascalu and M. Campillo, Slip-weakening Friction on a Periodic System of Faults: Spectral Analysis, Journal of Applied Mathematics and Physics (ZAMP), vol. 53, 980--995, 2002, PDF-file

P. Hild, I. R. Ionescu, T. Lachand-Robert and I. Rosca, ``The bolcking property of an inhomogeneous Bingham fluid. Applications to landslides'', Mathematical Modelling and Numerical Analysis (M2AN), Vol. 36, No. 6, 1013-1026, 2002, PDF-file

P. Favreau, M. Campillo and I. R. Ionescu, ``Initiation of Instability under Slip Dependent Friction in Three Dimension'', Journal of Geophysical Research, Vol. 107 (B7), 2002, PDF-file

C. Voisin, I. R. Ionescu and M. Campillo, ``Crack growth resistance and dynamic rupture arest under slip Dependent friction'', Physics of the Earth and Planetary Interiors, vol. 131, 279-294, 2002, PDF-file

I. R. Ionescu, ``Viscosity solutions for dynamic problems with slip rate dependent friction'', Quarterly of Applied Mathematics, vol LX, No. 3, 461-476, 2002, PDF-file

I. R. Ionescu and Q.-L. Nguyen, ``Dynamic contact problems with slip dependent friction in viscoelasticity'', International Journal of Applied Mathematics and Computer Science, Vol.12, No. 1, 101-110, 2002, PDF-file

C. Voisin, I. R. Ionescu, M. Campillo, R. Hassani and Q.-L. Nguyen, ``Spectral Analysis of the initiation process on a bounded fault zone'', Geophysical Journal, International, 148 (1), 120-131, 2002, PDF-file

I. R. Ionescu, M. Campillo, C. Dascalu, P. Favreau and C. Voisin, "Initiation of friction instability on a plane fault system", Contact Mechanics, J.A.C. Martins, M.D.P.M. Marques (Eds.), Kluwer Acad. Pub., 99-108, 2002, PDF-file

P. Hild, R. Hassani and I. R. Ionescu, "Analysis of eigenvalue problems modelling friction : sufficient conditions of non-uniqueness for the elastic equilibrum", Contact Mechanics, J.A.C. Martins, M.D.P.M. Marques (Eds.), Kluwer Acad. Pub., 133-140, 2002, PS-file

M. Campillo, P. Favreau, I. R. Ionescu and C. Voisin, ``On the Effective Friction law of an Heterogeneous Fault'', Journal of Geophysical Research, Vol. 106, B8, 16307-16322, 2001, PDF-file

C. Voisin, M. Campillo, I. R. Ionescu,F. Cotton and O. Scotti, ``Dynamic versus static stress triggering and friction parameters: Inferences from the 23 November, 1980, Irpinia earthquake'', Journal of Geophysical Research, vol. 109, 20.647-20.659, 2000, PDF-file

C. Dascalu, I. R. Ionescu and M. Campillo, ``On the antiplane problem of a finite fault with slip dependent friction'', Earth and Planetary Science Letters, No. 177, 163-176, 2000, PDF-file

P. Favreau, M. Campillo and I. R. Ionescu , ``Initiation of inplane shear instability under slip dependent friction'', Bulletin of the Sismological Society of America, vol. 89, No. 5, 1280-1295, 1999, PDF-file

P. Favreau, I. R. Ionescu and M. Campillo, ``On the dynamic sliding with rate and state dependent friction laws'', Geophysical Journal, International, vol. 139, 671-678, 1999, PDF-file

I. R. Ionescu and M. Campillo, "The influence of the shape of the friction law and fault finiteness on the duration of initiation'', Journal of Geophysical Research, Vol. 104, No. B2, 3013-3024, 1999, PDF-file

M. Campillo and I. R. Ionescu, "Initiation of antiplane shear instability under slip dependent friction", Journal of Geophysical Research, vol. 122, No. B9, 20363-20371, 1997, PDF-file

M. Campillo, I. R. Ionescu, J.-C.Paumier and Y.Renard, "On the dynamic sliding with Friction of a rigid block and of an infinite elastic slab", Physics of the Earth and Planetary Interiors, Vol. 96, 15-23, 1996, PDF-file

I. R. Ionescu and J.-C.Paumier, "On the contact problem with slip displacement dependent friction in elastostatics", International Journal of Engineering Sciences, Vol. 34, No 4, 471-491, 1996, PDF-file

I. R. Ionescu and J.-C. Paumier, "Instabilities in slip dependent friction", Elasticity, Viscoelaticity and Optimal Control, Theoretical and Numerical Aspects, J. Blum, A. Raoult (Ed.), ESAIM Proceedings, 1, 157-168, 1996, PS-file

I. R. Ionescu and J.-C.Paumier, "Slip displacement dependent friction in quasi-static elasticity"; Contact Mechanics, M. Raous, M. Jean and J.J. Moreau (Ed.), 119-126, Plenum Press, New York, 1995

N. Cristescu, I. R. Ionescu and I.Rosca, "A numerical analysis of the foot-floor interaction in longwall workings", International Journal for Numerical and Analytical Methods in Geomechanics, Vol. 18, 641-652, 1994

I. R. Ionescu and J.-C.Paumier, "On the contact problem with slip rate dependent friction in elastodynamics"; European Journal of Mechanics, A/Solids, Vol. 13 , No 4, 555-568, 1994

I. R. Ionescu and M.Predeleanu, "On the dynamic shearing problem for rate-and temperature-dependent media"; Quarterly Journal of Mechanics and Applied Mathematics, Vol. 46, No 3, 437-456, 1993

I. R. Ionescu and M.Sofonea, "Functional and numerical methods in viscoplasticity", Oxford Mathematical Monographs, Oxford University Press, 265 p., 1993, Abstract

I. R. Ionescu and J.-C.Paumier, "Dynamic stick-slip motions with sliding velocity-dependent friction"; C. R. Acad. Sci. Paris, t. 316, série I, 121-125, 1993

C. Dascalu and I. R. Ionescu, "Weak solutions in rate type dynamic Viscoplasticity" , Nonlinear Hyperbolic Problems, A. Donato and F. Oliveri (Ed), Notes on Numerical Fluid Mechanics, Vol. 43, 184-191, 1993, Vieweg, Braunschweig

I. R. Ionescu, ``Dynamics Processes for a class of elastic-visco-plastic materials'', Mathematical Reports, Vol. 44, No 2, 113-125, 1992

I. R. Ionescu, ``Some Existence results in One Dimensional Dynamic Viscoplasticity with Work Hardening'', IMA Journal of Applied Mathematics, 47, p.217-228, 1991

I. R. Ionescu and I. Rosca, ``Sobolev Solutions for Convex Variational Problems in Locally Convex Spaces'', Differential Equations and Control Theory, V. Barbu (editor), Pitman Research Notes in Mathematics, vol. 250, 121-125, 1991

I. R. Ionescu and I. Rosca, ``Some Examples for Friedrichs Extentions of Nonconvex Variational Problems, Bulletin Mathématiques de la Societé de Sciences Mathématiques de Roumanie, vol. 83, no.35, 1-2, 89-96, 1991

I. R. Ionescu and I.Rosca, ``Friedrichs Extensions for Nonconvex Variational Problems'', Nonlinear Analysis, vol. 14, no. 11, p.905-914, 1990

I. R. Ionescu, ``Méthodes Fonctionnelles et Numériques en Viscoplasticité'', Mathematical Repports, vol. 42, no.4, 309-399, 1990

I. R. Ionescu, ``Error Estimates of an Euler Method for a Quasistati Elastic-Viscoplastic Problem'', Zeitchrift fur Angewante Matematik und Mekanik (ZAMM), vol. 70, no.3, p.173-180, 1990

I. R. Ionescu and M. Tucsnak, ``A Singular Perturbation Problem for the Heat Equation in two Phases Media'', Révue Roumaine de Mathématiques Pures et Appliquées, vol.34, no. 6, p.537-544, 1989

I. R. Ionescu and B. Vernescu, ``A Numerical Method for a Viscoplastic Problem. An Application to the Wire Drawing'', International Journal of Engenering Sciences, vol.26, no. 6, p.627-633, 1988

I. R. Ionescu and M. Sofonea, ``Quasistatic Processes for Elastic-Viscoplastic Materials'', Quarterly of Applied Mathematics, vol. 46, no. 2, p.229-243, 1988

I. R. Ionescu, `` Error Estimates of a Numerical Method for a Nonlinear Evolution Equation'', Annales de l'Université de Bucarest, Mathématiques-Informatique, no. 2, p.64-74, 1988

I. R. Ionescu and M.Sofonea, ``The Blocking Property in the Study of the Bingham Fluid'', International Journal for Engenering Sciences, vol. 24, no. 3, 289-297, 1986

I. R. Ionescu, I.Molnar and B.Vernescu, ``A finite element model of Wire Drawing'', Révue Roumaine de Sciences Techniques-Mécanique Appliquée, vol. 30, no. 6, 611-622, 1985

I. R. Ionescu, I. Rosca and M. Sofonea, ``A Variational Method for Nonlinear Multivalued Operators'', Nonlinear Analysis, TMA, vol.9, no.2, 259-273, 1985

I. R. Ionescu and M.Sofonea, ``A Variational Formulation of a Boundary Value Problem in the Study of the Bingham Fluid'', Révue Roumaine de Sciences Techniques - Mécanique Appliquée, vol.30, no.4, p.357-363, 1985

I. R. Ionescu, ``A Boundary Value Problem with a Non-Local Viscoplastic Friction Law for the Bingham Fluid'', Mathematical Reports, vol. 37, no.1, 60-65, 1985

I. R. Ionescu and I. Rosca, ``A Variational Proof of Friedrichs Extension Theorem'', Annales de l'Université de Bucarest, XXXII, 44-51, 1984

I. R. Ionescu and I. Molnar, ``Sur l'Estimation de l'Erreur pour un Problème Parabolique'', Annales de l'Université de Bucarest, XXXII, 29-43, 1982

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