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HARD COATINGS DURABILITY UNDER VARIABLE FRETTING WEAR CONDITIONS ; ENDURANCE DES DEPOTS DURS SOUS SOLLICITATIONS VARIABLES DE FRETTING WEAR

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  • معلومة اضافية
    • Contributors:
      École Centrale de Lyon (ECL); Université de Lyon; Łódź University of Technology; Ecole Centrale de Lyon; Lodz University of Technology; Siegfried FOUVRY; Bogdan WENDLER
    • بيانات النشر:
      HAL CCSD
    • الموضوع:
      2004
    • Collection:
      Université de Lyon: HAL
    • نبذة مختصرة :
      The main research objective of this work is to introduce the criterion to establish the coatings durability under fretting wear under variable and constant loading conditions. The local dissipated energy density approach has been applied where quantity of the energy dissipated within the contact area is related to the maximum wear depth. In the work this energy approach has been developed by introduction of the critical energy value related to the durability of a coating. This critical value indicates the specific quantity of energy that has to be delivered to the coating in order to worn through its total thickness and is characteristic for each material. The durability of the investigated coatings has been depicted by means of novel Energy-Whöle wear chart. The proposed criterion allows to indicate a single coating with the best tribological properties among the others but also delivers the information : what is the duration of this surface treatment. ; Les objectifs de cette thèse sont de développer et d'optimiser des traitements de surface (dépôts durs) et de développer au travers d'un contact model de fretting wear un modèle prédictif de l'endurance de ces traitements de surfaces pour des sollicitations variables et constantes de fretting wear. La démarche énergétique proposée, introduisant le concept de capacité énergétique, pour rationaliser l'endurance des traitements de surface permet non seulement de comparer les traitements de surface mais aussi et surtout de formaliser la durée de vie pour un très large spectre de chargements. Cette démarche permet aussi une analyse physique des endommagements et ainsi de développer une approche thermodynamique de l'usure. Elle permet aussi d'isoler respectivement les différents mécanismes d'endommagement activés.
    • Relation:
      NNT: 2004ECDL0027; tel-04308116; https://hal.science/tel-04308116; https://hal.science/tel-04308116/document; https://hal.science/tel-04308116/file/tliskiewicz_2004LYSEC27.pdf
    • الدخول الالكتروني :
      https://hal.science/tel-04308116
      https://hal.science/tel-04308116/document
      https://hal.science/tel-04308116/file/tliskiewicz_2004LYSEC27.pdf
    • Rights:
      info:eu-repo/semantics/OpenAccess
    • الرقم المعرف:
      edsbas.12ABE196