Modeling of creep damage evolution around blunt notches and sharp cracks

K. J. Hsia, A. S. Argon, D. M. Parks

Research output: Contribution to journalArticlepeer-review


The spread of intergranular creep damage around blunt notches and sharp cracks in ductile single phase alloys such as Type 304 stainless steel has been modeled by a mechanism based continuum material damage model and a finite element approach. The details of the material damage model have been derived from extensive earlier experimental results on this material carried out by us. The finite element simulation of the evolution of intergranular damage in the form of accumulating densities of grain boundary facet cracks has indicated that while this damage spreads out preferentially along inclined planes around the tips of sharp cracks, it localized in the symmetry plane ahead of a blunt notch. These results are in excellent agreement with the experimental observations of Ozmat, et al. on the directions of early crack growth from sharp cracks and blunt notches in 304 stainless steel.

Original languageEnglish (US)
Pages (from-to)19-42
Number of pages24
JournalMechanics of Materials
Issue number1
StatePublished - Mar 1991
Externally publishedYes

ASJC Scopus subject areas

  • Mechanics of Materials
  • Instrumentation
  • General Materials Science


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