• français
    • English
    français
  • Login
Help
View Item 
  •   Home
  • Laboratoire d'Etude des Microstructures et de Mécanique des Matériaux (LEM3)
  • View Item
  • Home
  • Laboratoire d'Etude des Microstructures et de Mécanique des Matériaux (LEM3)
  • View Item
JavaScript is disabled for your browser. Some features of this site may not work without it.

Experimental characterisation and computational modelling of cyclic viscoplastic behaviour of turbine steel

Type
Articles dans des revues avec comité de lecture
Author
RAE, Yaroslav
407023 University of Nottingham, UK [UON]
BENAARBIA, Adil
178323 Laboratoire d'Etude des Microstructures et de Mécanique des Matériaux [LEM3]
HUGUES, Jeremy
571021 RWE Generation UK [RWE]
SUN, Wei
407023 University of Nottingham, UK [UON]

URI
http://hdl.handle.net/10985/17197
DOI
10.1016/j.ijfatigue.2019.01.022
Date
2019
Journal
International Journal of Fatigue

Abstract

Fully reversed strain controlled low cycle fatigue and creep-fatigue interaction tests have been performed at ±0.7% strain amplitude and at three different temperatures (400°C, 500°C and 600°C) to investigate the cyclic behaviour of a FV566 martensitic turbine steel. From a material point of view, the hysteresis mechanical responses have demonstrated cyclic hardening at the running-in stage and subsequent, hysteresis cyclic softening during the rest of the material life. The relaxation and energy behaviours have shown a rapid decrease at the very beginning of loading followed by quasi-stabilisation throughout the test. A unified, temperature- and rate-dependent visco-plastic model was then developed and implemented into the Abaqus finite element (FE) code through a user defined subroutine (UMAT). The material parameters in the model were determined via an optimisation procedure based on a genetic solver. The multi-axial form of the constitutive model developed was demonstrated by analysing the thermomechanical responses of an industrial gas turbine rotor subjected to in-service conditions. A sub-modelling technique was used to optimise the FEA. A 2D global model of the rotor with a 3D sub-model of the second stage of the low pressure turbine were then analysed in turn. The complex transient stress and accumulated plastic strain fields were investigated under realistic thermo-mechanical fatigue loading (start-up and shut-down power plant loads). The sub-model was then used for local analysis leading to identification of potential crack initiation sites for the presented types of blade roots.

Files in this item

Name:
LEM3_IJF_2019_RAE.pdf
Size:
5.695Mb
Format:
PDF
Embargoed until:
2020-01-01
View/Open

Collections

  • Laboratoire d'Etude des Microstructures et de Mécanique des Matériaux (LEM3)

Related items

Showing items related by title, author, creator and subject.

  • Characterization of cyclic behavior, deformation mechanisms, and microstructural evolution of MarBN steels under high temperature conditions 
    BENAARBIA, Adil; XU, Xu; SUN, Wei; BECKER, Adib; OSGERBY, Steve (Elsevier, 2019)
    In this paper, the low cycle fatigue behaviour of MarBN steels at elevated temperatures is discussed. Four cyclic loading waveforms were applied to investigate both the mechanical and microstructural features. The mechanical ...
  • Piezoelectric-piezomagnetic behaviour of coated long fiber composites accounting for eigenfields 
    CHATZIGEORGIOU, George; BENAARBIA, Adil; MERAGHNI, Fodil (Elsevier, 2019)
    A unified micromechanical approach is proposed to evaluate the electro-magneto-mechanical response of coated long fiber composites with transversely isotropic piezoelectric-piezomagnetic behaviour. The developed framework ...
  • A fully coupled thermo-viscoelastic-viscoplastic-damage framework to study the cyclic variability of the Taylor-Quinney coefficient for semi-crystalline polymers 
    BENAARBIA, Adil; CHATZIGEORGIOU, George; KIEFER, Bjoern; MERAGHNI, Fodil (Elsevier BV, 2019)
    In the present work, a rigorous and consistent thermo-viscoelastic-viscoplastic ductile damage model is proposed to address the variability of the Taylor-Quinney coefficient (the storage to anelastic energy rate ratio) ...
  • Removal of algal blooms from freshwater by the coagulation-magnetic separation method 
    LIU, Dan; WANG, Pengbo; WEI, Guanran; DONG, Wenbo; HUI, Franck (Springer, 2013)
    This research investigated the feasibility of changing waste into useful materials for water treatment and proposed a coagulation-magnetic separation technique. This technique was rapid and highly effective for clearing ...
  • A Predictive-reactive Approach for JSP with Uncertain Processing Times 
    NIU, Ganggang; SUN, Shudong; LAFON, Pascal; ROUCOULES, Lionel (Springer Verlag, 2011)
    JSP with discretely controllable processing times (JSP-DCPT) that are perturbed in a turbulent environment is formulated, based on which, a time-cost tradeoff based predictive-reactive scheduling approach is proposed for ...

Browse

All SAMCommunities & CollectionsAuthorsIssue DateCenter / InstitutionThis CollectionAuthorsIssue DateCenter / Institution

Newsletter

Latest newsletterPrevious newsletters

Statistics

Most Popular ItemsStatistics by CountryMost Popular Authors

ÉCOLE NATIONALE SUPERIEURE D'ARTS ET METIERS

  • Contact
  • Mentions légales

ÉCOLE NATIONALE SUPERIEURE D'ARTS ET METIERS

  • Contact
  • Mentions légales