Application of the material force method to ductile fracture

T. D. Nguyen, S. Govindjee, P. A. Klein, H. Gao

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

Abstract

We develop a material force method to calculate the energy release rate and work rate of dissipation for ductile fracture. We obtain expressions for the global material and dissipation forces from a global balance of energy-momentum that incorporates the effects of plastic dissipation. For implementation in a finite element framework, we develop an equivalent domain integral formulation from the weak form of the energy-momentum balance. A Galerkin discretization of the domain integral expressions produces approximations for the global material and dissipation forces that are the weighted sum of corresponding nodal forces. We verify the material force formulation and the numerical method for the model problem of cohesive fracture in a K-field. The model problem is also used to examine the effects of bulk material properties on the work of dissipation.

Original languageEnglish (US)
Title of host publicationMultiscaling in Applied Science and Emerging Technology; Fundamentals and Applications in Mesomechanics
Subtitle of host publicationProceedings of the Sixth International Conference for Mesomechanics
EditorsG.C. Sih, T.B. Kermanidis, S.G. Pantelakis
Pages522-529
Number of pages8
StatePublished - 2004
Externally publishedYes
EventMultiscaling in Applied Science and Emerging Technology; Fundamentals and Applications in Mesomechanics:Proceedings of the Sixth International Conference for Mesomechanics - Patras, Greece
Duration: May 31 2004Jun 4 2004

Publication series

NameMultiscaling in Applied Science and Emerging Technology, Fundamentals and Applications in Mesomechanics: Proceedings of the Sixth International Conference for Mesomechanics

Conference

ConferenceMultiscaling in Applied Science and Emerging Technology; Fundamentals and Applications in Mesomechanics:Proceedings of the Sixth International Conference for Mesomechanics
Country/TerritoryGreece
CityPatras
Period5/31/046/4/04

Keywords

  • Ductile fracture
  • J-integral
  • Material force
  • Plastic dissipation

ASJC Scopus subject areas

  • General Engineering

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