Multiscale damage criterion for fatigue life prediction in metallic materials

Chuntao Luo, Manuel Parra-Garcia, Aditi Chattopadhyay, Pedro Peralta, Jun Wei

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Scopus citations

Abstract

In this paper a multiscale damage criterion for fatigue life prediction is introduced. A damage evolution rule based on strain energy density is modified to incorporate crystal plasticity at the microscale. A damage tensor that indicates the local damage state is derived using optimization theory. Local damage information is passed from local to grain level in the form of a damage vector via averaging techniques. Finally, the damage evolution rule for a meso representative volume element (RVE) is calculated through the Kreisselmeier- Steinhauser (KS) function, which can produce an envelope function for multiobjective optimization. The weighted averaging method is also used to obtain the corresponding damage evolution direction for the meso RVE. A critical damage value is derived in this paper to complete the damage criterion for fatigue life prediction. Simulation results and comparison with experimental data are presented.

Original languageEnglish (US)
Title of host publication50th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference
StatePublished - 2009
Event50th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference - Palm Springs, CA, United States
Duration: May 4 2009May 7 2009

Publication series

NameCollection of Technical Papers - AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference
ISSN (Print)0273-4508

Other

Other50th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference
CountryUnited States
CityPalm Springs, CA
Period5/4/095/7/09

ASJC Scopus subject areas

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

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