Shielding effects and dislocation repositioning at cleavage crack growth

P. Andersson; Per Ståhle

Shielding effects and dislocation repositioning at cleavage crack growth

P. Andersson, Per Ståhle

Luleå University of Technology

Research output: Chapter in Book/Report/Conference proceeding › Paper in conference proceeding › peer-review

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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.

Original language	English
Title of host publication	Mechanisms and mechanics of damage and failure
Subtitle of host publication	proceedings of the 11th Biennial European conference on fracture -ECF 11- held in Poitiersa-Futuroscope, France, 3-6 September 1996 ...
Editors	J. Petit, J. deFouquet, G. Henaff, P. Villechaise, A. Dragon
Pages	419-424
Publication status	Published - 1996
Externally published	Yes
Event	11th Biennial European Conference on Fracture - ECF 11 - Futuroscope, Poitiers, France Duration: 1996 Sept 3 → 1996 Sept 6

Conference

Conference	11th Biennial European Conference on Fracture - ECF 11
Country/Territory	France
City	Poitiers
Period	1996/09/03 → 1996/09/06

Subject classification (UKÄ)

Mechanical Engineering

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ShieldingAnderssonStahleFinal published version, 189 KBLicence: Unspecified

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Andersson, P., & Ståhle, P. (1996). Shielding effects and dislocation repositioning at cleavage crack growth. In J. Petit, J. deFouquet, G. Henaff, P. Villechaise, & A. Dragon (Eds.), 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 ... (pp. 419-424)

Andersson, P. ; Ståhle, Per. / Shielding effects and dislocation repositioning at cleavage crack growth. 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 .... editor / J. Petit ; J. deFouquet ; G. Henaff ; P. Villechaise ; A. Dragon. 1996. pp. 419-424

@inproceedings{cbce3d36170348c7ba4237e312868ea5,

title = "Shielding effects and dislocation repositioning at cleavage crack growth",

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 = "P. Andersson and Per St{\aa}hle",

year = "1996",

language = "English",

isbn = "0947817905",

pages = "419--424",

editor = "J. Petit and J. deFouquet and G. Henaff and P. Villechaise and A. Dragon",

booktitle = "Mechanisms and mechanics of damage and failure",

note = "11th Biennial European Conference on Fracture - ECF 11 ; Conference date: 03-09-1996 Through 06-09-1996",

}

Andersson, P & Ståhle, P 1996, Shielding effects and dislocation repositioning at cleavage crack growth. in J Petit, J deFouquet, G Henaff, P Villechaise & A Dragon (eds), 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 .... pp. 419-424, 11th Biennial European Conference on Fracture - ECF 11, Poitiers, France, 1996/09/03.

Shielding effects and dislocation repositioning at cleavage crack growth. / Andersson, P.; Ståhle, Per.
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 .... ed. / J. Petit; J. deFouquet; G. Henaff; P. Villechaise; A. Dragon. 1996. p. 419-424.

Research output: Chapter in Book/Report/Conference proceeding › Paper in conference proceeding › peer-review

TY - GEN

T1 - Shielding effects and dislocation repositioning at cleavage crack growth

AU - Andersson, P.

AU - Ståhle, Per

PY - 1996

Y1 - 1996

N2 - 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.

AB - 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.

M3 - Paper in conference proceeding

SN - 0947817905

SP - 419

EP - 424

BT - Mechanisms and mechanics of damage and failure

A2 - Petit, J.

A2 - deFouquet, J.

A2 - Henaff, G.

A2 - Villechaise, P.

A2 - Dragon, A.

T2 - 11th Biennial European Conference on Fracture - ECF 11

Y2 - 3 September 1996 through 6 September 1996

ER -

Shielding effects and dislocation repositioning at cleavage crack growth

Abstract

Conference

Subject classification (UKÄ)

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