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Shielding effects and dislocation repositioning at cleavage crack growth

In English

Författare

Redaktör

  • J. Petit
  • J. deFouquet
  • G. Henaff
  • P. Villechaise
  • A. Dragon

Summary, in English

The motion of pre-existing edge dislocations in an infinite linear elastic body is studied. Motion is due to a quasi-statically steady-state growing crack. In the model, the dislocations glide if the force on the dislocation exceeds a critical value. Obtained results are changes in dislocation density, the shielding effect on the crack tip and residual stresses. The model is applied to an isotropic material. The residual stress far behind the crack tip is tensile near the crack, decreasing to zero at a certain distance above the crack plane. The indication is that the shielding effect may be considerable.

Publiceringsår

1996

Språk

Engelska

Sidor

419-424

Publikation/Tidskrift/Serie

Mechanisms and mechanics of damage and failure : proceedings of the 11th Biennial European conference on fracture -ECF 11- held in Poitiersa-Futuroscope, France, 3-6 September 1996 ...

Dokumenttyp

Konferensbidrag

Ämne

  • Mechanical Engineering

Conference name

11th Biennial European Conference on Fracture - ECF 11

Conference date

1996-09-03 - 1996-09-06

Conference place

Poitiers, France

Status

Published

ISBN/ISSN/Övrigt

  • ISBN: 0947817905