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Elastic-plastic microcontact odel for elliptical contact areas and its application to a treillis point in overhead electrical conductors / Frédéric Lévesque in Transactions of the ASME . Journal of tribology, Vol. 133 N° 1 (Janvier 2011) 

Public ISBD [article]  in Transactions of the ASME . Journal of tribology > Vol. 133 N° 1 (Janvier 2011) . - 09 p. Titre : Elastic-plastic microcontact odel for elliptical contact areas and its application to a treillis point in overhead electrical conductors Type de document : texte imprimé Auteurs : Frédéric Lévesque, Auteur ; Sylvain Goudreau, Auteur ; Louis Cloutier, Auteur Année de publication : 2012 Article en page(s) : 09 p. Note générale : Tribology Langues : Anglais (eng) Mots-clés : Elasticity  Fatigue  Finite  element  analysis  Mechanical  contact  Micromechanics  Plasticity  Transmission  lines  Vibrations  Wear  Wires  (electric) Index. décimale : 621.5 Energie pneumatique. Machinerie et outils. Réfrigération Résumé : Aeolian vibrations represent a threat to the integrity of electrical transmission lines. The fretting fatigue of conductors is thus a major concern. The modelization of the contact conditions at critical points is an important tool in assessing the life of conductors. Treillis points around the last point of contact between the conductor and the pieces of equipment are such critical points. We observe a fully plastic contact condition at these points. Finite element results for the contact between an ellipsoid and a rigid plane and between two wires at different angles are compared with an elastic-plastic microcontact model for elliptical contact areas. These numerical results are then compared with experimental ones for the contact between two wires of a conductor (ACSR Bersfort), showing a very similar relationship between the contact force and the observed contact area. We have a good correlation between the microcontact model and the finite elements ones in the fully plastic contact regime on both the contact area and the contact force for a given interference between bodies. The use of the elastic-plastic microcontact model for elliptical contacts presented in this paper proves to be a strong tool in getting a better understanding of the mechanical behavior at those critical points. DEWEY : 621.5 ISSN : 0742-4787 En ligne : http://scitation.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=JOTRE900013 [...] [article] Elastic-plastic microcontact odel for elliptical contact areas and its application to a treillis point in overhead electrical conductors [texte imprimé] / Frédéric Lévesque, Auteur ; Sylvain Goudreau, Auteur ; Louis Cloutier, Auteur . - 2012 . - 09 p. Tribology Langues : Anglais (eng) in Transactions of the ASME . Journal of tribology > Vol. 133 N° 1 (Janvier 2011) . - 09 p. Mots-clés : Elasticity  Fatigue  Finite  element  analysis  Mechanical  contact  Micromechanics  Plasticity  Transmission  lines  Vibrations  Wear  Wires  (electric) Index. décimale : 621.5 Energie pneumatique. Machinerie et outils. Réfrigération Résumé : Aeolian vibrations represent a threat to the integrity of electrical transmission lines. The fretting fatigue of conductors is thus a major concern. The modelization of the contact conditions at critical points is an important tool in assessing the life of conductors. Treillis points around the last point of contact between the conductor and the pieces of equipment are such critical points. We observe a fully plastic contact condition at these points. Finite element results for the contact between an ellipsoid and a rigid plane and between two wires at different angles are compared with an elastic-plastic microcontact model for elliptical contact areas. These numerical results are then compared with experimental ones for the contact between two wires of a conductor (ACSR Bersfort), showing a very similar relationship between the contact force and the observed contact area. We have a good correlation between the microcontact model and the finite elements ones in the fully plastic contact regime on both the contact area and the contact force for a given interference between bodies. The use of the elastic-plastic microcontact model for elliptical contacts presented in this paper proves to be a strong tool in getting a better understanding of the mechanical behavior at those critical points. DEWEY : 621.5 ISSN : 0742-4787 En ligne : http://scitation.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=JOTRE900013 [...]