Peridynamic differential operator and its applications

Erdogan Madenci, Atila Barut, Michael Futch

Research output: Contribution to journalArticle

51 Scopus citations

Abstract

The nonlocal peridynamic theory has been proven extremely robust for predicting damage nucleation and propagation in materials under complex loading conditions. Its equations of motion, originally derived based on the principle of virtual work, do not contain any spatial derivatives of the displacement components. Thus, their solution does not require special treatment in the presence of geometric and material discontinuities. This study presents an alternative approach to derive the peridynamic equations of motion by recasting Navier's displacement equilibrium equations into their nonlocal form by introducing the peridynamic differential operator. Also, this operator permits the nonlocal form of expressions for the determination of the stress and strain components. The capability of this differential operator is demonstrated by constructing solutions to ordinary, partial differential equations and derivatives of scattered data, as well as image compression and recovery without employing any special filtering and regularization techniques.

Original languageEnglish (US)
Pages (from-to)408-451
Number of pages44
JournalComputer Methods in Applied Mechanics and Engineering
Volume304
DOIs
StatePublished - Jun 1 2016

Keywords

  • Compression
  • Data
  • Differentiation
  • Nonlocal
  • Peridynamic
  • Recovery

ASJC Scopus subject areas

  • Computer Science Applications
  • Computational Mechanics
  • Mechanics of Materials
  • Mechanical Engineering
  • Physics and Astronomy(all)

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