Simulations of micron-scale fracture using atomistic-based boundary element method

Xiaojie Wu, Xiantao Li

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

A new formulation of a boundary element method (BEM) is proposed in this paper to simulate cracks at the micron scale. The main departure from the traditional BEMs is that the current model is derived from the underlying atomistic model, which involves the interactions of atoms at the scale of Angstroms. By using the lattice Green's function, the new BEM formulation eliminates the excessive atomic degrees of freedom away from crack tips, and directly couples the process zones with the physical boundary conditions. We show that with such a drastic reduction, one can simulate brittle fracture process on the scale of microns, for which the entire system consists of a few billion atoms. We discuss several numerical issues to make the implementation more efficient. Examples will be presented for cracks in the bcc iron system.

Original languageEnglish (US)
Article number085008
JournalModelling and Simulation in Materials Science and Engineering
Volume25
Issue number8
DOIs
StatePublished - Oct 30 2017

All Science Journal Classification (ASJC) codes

  • Modeling and Simulation
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Computer Science Applications

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