Creep failure simulations of 316H at 550°C: Part I - A method and validation

Chang Sik Oh, Nak Hyun Kim, Yun Jae Kim, Catrin Davies, Kamran Nikbin, David Dean

Research output: Contribution to journalArticle

68 Citations (Scopus)

Abstract

This paper proposes a method to simulate creep failure using finite element damage analysis. The creep damage model is based on the creep ductility exhaustion concept, and incremental damage is defined by the ratio of incremental creep strain and multi-axial creep ductility. A simple linear damage summation rule is applied and, when accumulated damage becomes unity, element stresses are reduced to zero to simulate progressive crack growth. For validation, simulated results are compared with experimental data for a compact tension specimen of 316H at 550. °C. Effects of the mesh size and scatter in uniaxial ductility are also investigated.

Original languageEnglish
Pages (from-to)2966-2977
Number of pages12
JournalEngineering Fracture Mechanics
Volume78
Issue number17
DOIs
Publication statusPublished - 2011 Dec

Keywords

  • Creep crack initiation and growth
  • Creep ductility
  • Finite element damage analysis

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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