Consistent tangent stiffness for local-nonlocal damage modelling of metals

Jonathan P. Belnoue, Giang D. Nguyen, Alexander M. Korsunsky

Research output: Contribution to journalConference articlepeer-review

8 Citations (Scopus)

Abstract

In the present study we consider an adaptation of Nguyen's model [6] for brittle materials to the case of ductile rupture. We focus our attention on the formulation of a consistent tangent stiffness matrix which is essential for the efficiency and convergence of the implementation within a finite element framework. We demonstrate the capability of the model to generate mesh-independent results and to follow the rupture process very close to failure. Rupture analysis of thin plates of different geometry is presented (symmetric double notch-edged specimen, asymmetric double notch-edged specimen, double notch-edged specimen containing a hole). Further modifications are outlined required to simulate crack growth and paths under the conditions of creep and fatigue.

Original languageEnglish
Pages (from-to)177-180
Number of pages4
JournalProcedia Engineering
Volume1
Issue number1
DOIs
Publication statusPublished - 2009
Externally publishedYes
EventMesomechanics 2009 - Oxford, United Kingdom
Duration: 24 Jun 200926 Jun 2009

Keywords

  • Creep
  • Damage
  • Ductile materials
  • Fatigue
  • Nonlocal plastic strain

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