Webbläsaren som du använder stöds inte av denna webbplats. Alla versioner av Internet Explorer stöds inte längre, av oss eller Microsoft (läs mer här: * https://www.microsoft.com/en-us/microsoft-365/windows/end-of-ie-support).

Var god och använd en modern webbläsare för att ta del av denna webbplats, som t.ex. nyaste versioner av Edge, Chrome, Firefox eller Safari osv.

Characteristics of short fatigue crack growth in the vicinity of a low angle grain boundary

Författare

Summary, in English

The influence on the crack growth behaviour of a short edge crack under fatigue due to different configurations of a nearby located low angle grain boundary is investigated under quasi-static and plane strain conditions. The geometry is modelled by distributed dislocation dipole elements in a boundary element method approach, and the plasticity is described by discrete dislocations, located along specific slip planes in the material. The crack is assumed to grow in a single shear mechanism due to nucleation, glide and annihilation of dislocations in the material. It was found that both the nature of the dislocations in the grain boundary, the distances between them and the placement of the dislocations in the grain boundary with respect to preferred slip plane directions strongly influenced the growth behaviour. It was found that, a boundary consisting of dislocations with Burgers vector pointing inwards into the material attracted the dislocations in the plastic zone. This resulted in lower growth rates as compared with a boundary consisting of dislocations having a Burgers vector pointing outwards of the material.

Avdelning/ar

Publiceringsår

2012

Språk

Engelska

Sidor

59-67

Publikation/Tidskrift/Serie

International Journal of Fatigue

Volym

36

Issue

1

Dokumenttyp

Artikel i tidskrift

Förlag

Elsevier

Ämne

  • Applied Mechanics

Nyckelord

  • Short crack
  • discrete dislocation
  • fatigue
  • low angle grain boundary.

Conference name

7th EUROMECH Solid Mechanics Conference (ESMC7)

Conference date

2009-09-07 - 2009-09-11

Conference place

Lisboa, Portugal

Status

Published

ISBN/ISSN/Övrigt

  • ISSN: 1879-3452