Documents disponibles écrits par cet auteur

Continua with microstructure / Euripides Papamichos in European journal of environmental and civil engineering, Vol. 14 N° 8-9 (Septembre 2010) 

Public ISBD [article]  in European journal of environmental and civil engineering > Vol. 14 N° 8-9 (Septembre 2010) . - pp. 1011-1029 Titre : Continua with microstructure : Cosserat theory Type de document : texte imprimé Auteurs : Euripides Papamichos, Auteur Année de publication : 2011 Article en page(s) : pp. 1011-1029 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Cosserat  continuum  Microstructure  Couple  stress  Internal  length  Elastoplasticity  Timoshenko  beam Index. décimale : 624 Constructions du génie civil et du bâtiment. Infrastructures. Ouvrages en terres. Fondations. Tunnels. Ponts et charpentes Résumé : A brief description of the Cosserat continuum theory is presented. In the Introduction the history of the evolution of the theory is presented followed with some examples where the differences between the classical and Cosserat continua are more evident and the main areas of application. The formulation of the Cosserat continuum is then presented followed with the description and the equations of Cosserat elastoplasticity. Particular expressions are given for Mohr-Coulomb non-associative elastoplasticity. Finally and example of a simple Cosserat elastic problem that of a Timoshenko beam is presented to demonstrate the effects of the theory on the bending rigidity of a beam. DEWEY : 624 ISSN : 1964-8189 En ligne : http://ejece.revuesonline.com/resnum.jsp [article] Continua with microstructure : Cosserat theory [texte imprimé] / Euripides Papamichos, Auteur . - 2011 . - pp. 1011-1029. Génie Civil Langues : Anglais (eng) in European journal of environmental and civil engineering > Vol. 14 N° 8-9 (Septembre 2010) . - pp. 1011-1029 Mots-clés : Cosserat  continuum  Microstructure  Couple  stress  Internal  length  Elastoplasticity  Timoshenko  beam Index. décimale : 624 Constructions du génie civil et du bâtiment. Infrastructures. Ouvrages en terres. Fondations. Tunnels. Ponts et charpentes Résumé : A brief description of the Cosserat continuum theory is presented. In the Introduction the history of the evolution of the theory is presented followed with some examples where the differences between the classical and Cosserat continua are more evident and the main areas of application. The formulation of the Cosserat continuum is then presented followed with the description and the equations of Cosserat elastoplasticity. Particular expressions are given for Mohr-Coulomb non-associative elastoplasticity. Finally and example of a simple Cosserat elastic problem that of a Timoshenko beam is presented to demonstrate the effects of the theory on the bending rigidity of a beam. DEWEY : 624 ISSN : 1964-8189 En ligne : http://ejece.revuesonline.com/resnum.jsp

Erosion and multiphase flow in porous media / Euripides Papamichos in European journal of environmental and civil engineering, Vol. 14 N° 8-9 (Septembre 2010) 

Public ISBD [article]  in European journal of environmental and civil engineering > Vol. 14 N° 8-9 (Septembre 2010) . - pp. 1129-1154 Titre : Erosion and multiphase flow in porous media : Application to sand production Type de document : texte imprimé Auteurs : Euripides Papamichos, Auteur Année de publication : 2011 Article en page(s) : pp. 1129-1154 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Borehole  failure  Erosion  Sand  production  Two-phase  flow  Water  breakthrough Index. décimale : 624 Constructions du génie civil et du bâtiment. Infrastructures. Ouvrages en terres. Fondations. Tunnels. Ponts et charpentes Résumé : Experimental results from sand production hollow cylinders tests are presented for cavity failure and sand production quantification. The effects of important parameters such as the sandstone class, stress rate, fluid flow rate, and time are presented and show how they influence sand production. A model for hydro-mechanical erosion of porous rocks is presented as it is applied to the sand production problem in hydrocarbon production. The model is based on a continuum theory for erosion, which regards the continuum as a threephase medium and establishes a set of mass balance equations for the various phases. The solution requires an additional equation in the form of a constitutive or evolution law for the sand rate. Erosion is coupled with the mechanical behavior of a sand-producing cavity, and leads to enlargement of the erosion zone. Finally, multiphase flow and its effect on sand production is presented experimentally and theoretically by analyzing water invasion in the sand production test. DEWEY : 624 ISSN : 1964-8189 En ligne : http://ejece.revuesonline.com/resnum.jsp [article] Erosion and multiphase flow in porous media : Application to sand production [texte imprimé] / Euripides Papamichos, Auteur . - 2011 . - pp. 1129-1154. Génie Civil Langues : Anglais (eng) in European journal of environmental and civil engineering > Vol. 14 N° 8-9 (Septembre 2010) . - pp. 1129-1154 Mots-clés : Borehole  failure  Erosion  Sand  production  Two-phase  flow  Water  breakthrough Index. décimale : 624 Constructions du génie civil et du bâtiment. Infrastructures. Ouvrages en terres. Fondations. Tunnels. Ponts et charpentes Résumé : Experimental results from sand production hollow cylinders tests are presented for cavity failure and sand production quantification. The effects of important parameters such as the sandstone class, stress rate, fluid flow rate, and time are presented and show how they influence sand production. A model for hydro-mechanical erosion of porous rocks is presented as it is applied to the sand production problem in hydrocarbon production. The model is based on a continuum theory for erosion, which regards the continuum as a threephase medium and establishes a set of mass balance equations for the various phases. The solution requires an additional equation in the form of a constitutive or evolution law for the sand rate. Erosion is coupled with the mechanical behavior of a sand-producing cavity, and leads to enlargement of the erosion zone. Finally, multiphase flow and its effect on sand production is presented experimentally and theoretically by analyzing water invasion in the sand production test. DEWEY : 624 ISSN : 1964-8189 En ligne : http://ejece.revuesonline.com/resnum.jsp