Peridynamic modeling of granular fracture in polycrystalline materials

Dennj De Meo, Ning Zhu, Erkan Oterkus

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

A new peridynamic formulation is developed for cubic polycrystalline materials. The new approach can be a good alternative to traditional techniques such as finite element method and boundary element method. The formulation is validated by considering a polycrystal subjected to tension loading condition and comparing the displacement field obtained from both peridynamics and finite element method. Both static and dynamic loading conditions for initially damaged and undamaged structures are considered and the results of plane stress and plane strain configurations are compared. Finally, the effect of grain boundary strength, grain size, fracture toughness and grain orientation on time-to-failure, crack speed, fracture behaviour and fracture morphology are investig ated and the expected transgranular and intergranular failure modes are successfully captured. To the best of the authors’ knowledge, this is the first time that a peridynamic material model for cubic crystals is given in detail.
LanguageEnglish
Article number041008
Number of pages16
JournalJournal of Engineering Materials and Technology
Volume138
Issue number4
Early online date17 May 2016
DOIs
Publication statusPublished - 4 Jul 2016

Fingerprint

Polycrystalline materials
finite element method
Finite element method
formulations
plane stress
plane strain
failure modes
Polycrystals
boundary element method
polycrystals
Boundary element method
fracture strength
Failure modes
Fracture toughness
Grain boundaries
cracks
grain boundaries
grain size
Cracks
Crystals

Keywords

  • transgranular fracture
  • polycrystalline materials
  • peridynamics
  • dynamic fracture
  • crack branching
  • intergranular fracture

Cite this

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Peridynamic modeling of granular fracture in polycrystalline materials. / De Meo, Dennj; Zhu, Ning; Oterkus, Erkan.

In: Journal of Engineering Materials and Technology, Vol. 138, No. 4, 041008, 04.07.2016.

Research output: Contribution to journalArticle

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AU - De Meo, Dennj

AU - Zhu, Ning

AU - Oterkus, Erkan

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