Anisotropic peridynamic model—Formulation and implementation

Forskningsoutput: TidskriftsbidragArtikel i vetenskaplig tidskrift

Abstract

In this work, anisotropy is introduced in a peridynamic model. The spherical influence function is replaced by an ellipsoidal influence function. The model is mathematically formulated and implemented into the source files of LAMMPS, extending the program in a straight-forward manner. The extension ca be applied to other peridynamic model and here it is introduced into elasto-plastic peridynamic model in LAMMPS. The implemented model is tested through simulating beams loaded in compression. The model is found to alter the material behavior in the simulations compared to the original isotropic mode. A clear qualitative and quantitative difference in behavior is shown independently of pre-existing simulation parameters. The model is shown to be internally consistent. Finally we also demonstrated that the model can easily be extended to include several preferable direction opening for application as modeling elastic-plastic deformation of anisotropic heterogeneous crystalline matter.

Detaljer

Författare
Enheter & grupper
Externa organisationer
  • Lund University
Forskningsområden

Ämnesklassifikation (UKÄ) – OBLIGATORISK

  • Teknisk mekanik

Nyckelord

  • peridynamics, anisotropy, PDLAMMPS, implementation
Originalspråksvenska
Sidor (från-till)742-755
Antal sidor15
TidskriftAIMS Materials Science
Volym5
Utgåva nummer4
StatusPublished - 2018
PublikationskategoriForskning
Peer review utfördJa

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