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Shielding effects and dislocation repositioning at cleavage crack growth

Andersson, P. and Ståhle, Per LU (1996) 11th Biennial European Conference on Fracture (ECF 11) In 11th Biennial European Conference on Fracture (ECF 11) p.419-424
Abstract
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.
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author
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
in
11th Biennial European Conference on Fracture (ECF 11)
editor
Petit, J.; deFouquet, J.; Henaff, G.; Villechaise, P. and Dragon, A.
pages
419 - 424
conference name
11th Biennial European Conference on Fracture (ECF 11)
ISBN
0 947817 90 5
language
English
LU publication?
yes
id
cbce3d36-1703-48c7-ba42-37e312868ea5 (old id 1445036)
date added to LUP
2014-01-13 10:14:30
date last changed
2016-04-16 11:59:09
@misc{cbce3d36-1703-48c7-ba42-37e312868ea5,
  abstract     = {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.},
  author       = {Andersson, P. and Ståhle, Per},
  editor       = {Petit, J. and deFouquet, J. and Henaff, G. and Villechaise, P. and Dragon, A.},
  isbn         = {0 947817 90 5},
  language     = {eng},
  pages        = {419--424},
  series       = {11th Biennial European Conference on Fracture (ECF 11)},
  title        = {Shielding effects and dislocation repositioning at cleavage crack growth},
  year         = {1996},
}