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Creep Failure Simulations for 316H at 550°C

[+] Author Affiliations
Nak Hyun Kim, Yun Jae Kim

Korea University, Seoul, Korea

Catrin M. Davies, Kamran M. Nikbin

Imperial College London, London, UK

David W. Dean

EDF Energy, Barnwood, Gloucester, UK

Paper No. PVP2012-78133, pp. 325-330; 6 pages
doi:10.1115/PVP2012-78133
From:
  • ASME 2012 Pressure Vessels and Piping Conference
  • Volume 3: Design and Analysis
  • Toronto, Ontario, Canada, July 15–19, 2012
  • Conference Sponsors: Pressure Vessels and Piping Division
  • ISBN: 978-0-7918-5502-7
  • Copyright © 2012 by ASME

abstract

In this work a method to simulate failure due to creep is proposed using finite element damage analysis. The creep damage model is based on the creep ductility exhaustion concept. Incremental damage is defined by the ratio of incremental inelastic (plastic & creep) strain and multi-axial ductility. A simple linear damage summation rule is applied. When accumulated damage becomes unity, element stresses are reduced to almost zero to simulate progressive crack growth. The model is validated through comparison with experimental data on various sized compact tension, C(T), specimens of 316H stainless steel at 550 °C. The influence of the inelastic strain rate on the uniaxial ductility is considered. Good agreement is found between the simulated results and the experimental data.

Copyright © 2012 by ASME

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