Modeling of creep damage evolution around blunt notches and sharp cracks

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

doi:10.1016/0167-6636(91)90037-Z

Modeling of creep damage evolution around blunt notches and sharp cracks

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

University of Illinois Urbana-Champaign

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Abstract

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 language	English (US)
Pages (from-to)	19-42
Number of pages	24
Journal	Mechanics of Materials
Volume	11
Issue number	1
DOIs	https://doi.org/10.1016/0167-6636(91)90037-Z
State	Published - Mar 1991

ASJC Scopus subject areas

Materials Science(all)
Instrumentation
Mechanics of Materials

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title = "Modeling of creep damage evolution around blunt notches and sharp cracks",

abstract = "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.",

author = "Hsia, {K. J.} and Argon, {A. S.} and Parks, {D. M.}",

note = "Funding Information: This research has been supported by the NSF/MRL through the M.I.T. Center for Materials Science and Engineering under Grant. No. DMR-87-19217. The FEM computations have benefited markedly from the availability of an Alliant FX-8 computer made possible through a DARPA/ONR URI program on simulation of polymer properties under Contract No. N00014-86-K-0768. The ABAQUS finite element program was made available under academic license from Hibbitt, Karlsson, and Sorensen Inc., of Providence, Rhode Island.",

year = "1991",

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doi = "10.1016/0167-6636(91)90037-Z",

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AU - Hsia, K. J.

AU - Argon, A. S.

AU - Parks, D. M.

N1 - Funding Information: This research has been supported by the NSF/MRL through the M.I.T. Center for Materials Science and Engineering under Grant. No. DMR-87-19217. The FEM computations have benefited markedly from the availability of an Alliant FX-8 computer made possible through a DARPA/ONR URI program on simulation of polymer properties under Contract No. N00014-86-K-0768. The ABAQUS finite element program was made available under academic license from Hibbitt, Karlsson, and Sorensen Inc., of Providence, Rhode Island.

PY - 1991/3

Y1 - 1991/3

N2 - 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.

AB - 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.

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Modeling of creep damage evolution around blunt notches and sharp cracks

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