Incremental lifing method applied to high temperature aeronautical component - 11e COLLOQUE NATIONAL EN CALCUL DES STRUCTURES, CSMA 2013, Giens Accéder directement au contenu
Communication Dans Un Congrès Année : 2013

Incremental lifing method applied to high temperature aeronautical component

Arnaud Longuet
  • Fonction : Auteur
  • PersonId : 1028941
Anthony Burteau
  • Fonction : Auteur
  • PersonId : 1028942
François Comte
  • Fonction : Auteur
  • PersonId : 880552
Alexandre Crouchez-Pilot
  • Fonction : Auteur
  • PersonId : 1028943

Résumé

This study aims to determine the life time of turbo-machines combustion chambers manufactured in superalloy or turbine blades made of single crystal material. The determination of crack initiation spots in fatigue is based on an incremental damage law applied on finite element calculations. Incremental damage laws present many advantages: it avoids any concept of cycle counting and it is more suitable for calculation with complex cycles. This numerical damage model is implemented as a post processor. First, the stored energy is computed via the accumulation of plastic strain. Then, the stored energy eventually reaches a threshold from which damage starts to grow. Finally, the cumulated damage reaches a critical value corresponding to crack initiation. Various forms of energy accumulation and energy threshold are presented. In particular, a decoupled calculation of stored energy using internal variables of the Chaboche behavior is detailed. Two plastic potentials allow taking into account low and fast strain rate viscosities. In this scheme, different methods of energy accumulation are used for creep and fatigue contributions. The reliability is then tested on high temperature experimental results, representative of classic chamber or turbine blade loads. Finally, the robustness is evaluated on low temperature test results. The good correlation between numerical and experimental Wöhler curves validates the incremental lifetime prediction with a decoupled method. Further numerical simulations will validate its industrial use.
Fichier principal
Vignette du fichier
a_WA5D763D.pdf (539.87 Ko) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)
Loading...

Dates et versions

hal-01717826 , version 1 (28-02-2018)

Licence

Domaine public

Identifiants

  • HAL Id : hal-01717826 , version 1

Citer

Arnaud Longuet, Anthony Burteau, François Comte, Alexandre Crouchez-Pilot. Incremental lifing method applied to high temperature aeronautical component. 11e colloque national en calcul des structures, CSMA, May 2013, Giens, France. ⟨hal-01717826⟩

Collections

CSMA2013 CSMA
35 Consultations
33 Téléchargements

Partager

Gmail Facebook X LinkedIn More