Determination of the profile of the complete residual stress tensor in a VPPA weld using the multi-axial contour method

Mehmet E Kartal, C M David Liljedahl, Salih Gungor, Lyndon Edwards, Mike E Fitzpatrick

Research output: Contribution to journalArticle

52 Citations (Scopus)

Abstract

The multi-axial contour method is a recent development of the contour method of stress measurement. It permits measurement of the 3D residual stress distribution in a body, based on the assumption that the residual stresses are due to an inelastic misfit strain (eigenstrain) that does not change when a sample containing residual stresses is sectioned. The eigenstrain is derived from measured displacements due to residual stress relaxation when the specimen is sectioned. By carrying out multiple cuts, the full residual stress tensor in a continuously processed body can be determined, where the specimen has an initial length-to-width aspect ratio of 2:1. In the present study, first a finite element simulation of the technique was carried out to verify the method numerically. The method was then used to determine the residual stresses in a VPPA-welded sample, and the results were validated by neutron diffraction measurements.
Original languageEnglish
Pages (from-to)4417-4428
Number of pages12
JournalActa Materialia
Volume56
Issue number16
Early online date13 Jun 2008
DOIs
Publication statusPublished - 30 Sep 2008

Fingerprint

Tensors
Residual stresses
Welds
Stress measurement
Stress relaxation
Neutron diffraction
Stress concentration
Aspect ratio

Keywords

  • residual stresses
  • neutron diffraction
  • welding

Cite this

Determination of the profile of the complete residual stress tensor in a VPPA weld using the multi-axial contour method. / Kartal, Mehmet E; Liljedahl, C M David; Gungor, Salih; Edwards, Lyndon; Fitzpatrick, Mike E.

In: Acta Materialia, Vol. 56, No. 16, 30.09.2008, p. 4417-4428.

Research output: Contribution to journalArticle

Kartal, Mehmet E ; Liljedahl, C M David ; Gungor, Salih ; Edwards, Lyndon ; Fitzpatrick, Mike E. / Determination of the profile of the complete residual stress tensor in a VPPA weld using the multi-axial contour method. In: Acta Materialia. 2008 ; Vol. 56, No. 16. pp. 4417-4428.
@article{2fcf600cc0a84ef0bde72de035a34944,
title = "Determination of the profile of the complete residual stress tensor in a VPPA weld using the multi-axial contour method",
abstract = "The multi-axial contour method is a recent development of the contour method of stress measurement. It permits measurement of the 3D residual stress distribution in a body, based on the assumption that the residual stresses are due to an inelastic misfit strain (eigenstrain) that does not change when a sample containing residual stresses is sectioned. The eigenstrain is derived from measured displacements due to residual stress relaxation when the specimen is sectioned. By carrying out multiple cuts, the full residual stress tensor in a continuously processed body can be determined, where the specimen has an initial length-to-width aspect ratio of 2:1. In the present study, first a finite element simulation of the technique was carried out to verify the method numerically. The method was then used to determine the residual stresses in a VPPA-welded sample, and the results were validated by neutron diffraction measurements.",
keywords = "residual stresses, neutron diffraction, welding",
author = "Kartal, {Mehmet E} and Liljedahl, {C M David} and Salih Gungor and Lyndon Edwards and Fitzpatrick, {Mike E}",
year = "2008",
month = "9",
day = "30",
doi = "10.1016/j.actamat.2008.05.007",
language = "English",
volume = "56",
pages = "4417--4428",
journal = "Acta Materialia",
issn = "1359-6454",
publisher = "Elsevier Limited",
number = "16",

}

TY - JOUR

T1 - Determination of the profile of the complete residual stress tensor in a VPPA weld using the multi-axial contour method

AU - Kartal, Mehmet E

AU - Liljedahl, C M David

AU - Gungor, Salih

AU - Edwards, Lyndon

AU - Fitzpatrick, Mike E

PY - 2008/9/30

Y1 - 2008/9/30

N2 - The multi-axial contour method is a recent development of the contour method of stress measurement. It permits measurement of the 3D residual stress distribution in a body, based on the assumption that the residual stresses are due to an inelastic misfit strain (eigenstrain) that does not change when a sample containing residual stresses is sectioned. The eigenstrain is derived from measured displacements due to residual stress relaxation when the specimen is sectioned. By carrying out multiple cuts, the full residual stress tensor in a continuously processed body can be determined, where the specimen has an initial length-to-width aspect ratio of 2:1. In the present study, first a finite element simulation of the technique was carried out to verify the method numerically. The method was then used to determine the residual stresses in a VPPA-welded sample, and the results were validated by neutron diffraction measurements.

AB - The multi-axial contour method is a recent development of the contour method of stress measurement. It permits measurement of the 3D residual stress distribution in a body, based on the assumption that the residual stresses are due to an inelastic misfit strain (eigenstrain) that does not change when a sample containing residual stresses is sectioned. The eigenstrain is derived from measured displacements due to residual stress relaxation when the specimen is sectioned. By carrying out multiple cuts, the full residual stress tensor in a continuously processed body can be determined, where the specimen has an initial length-to-width aspect ratio of 2:1. In the present study, first a finite element simulation of the technique was carried out to verify the method numerically. The method was then used to determine the residual stresses in a VPPA-welded sample, and the results were validated by neutron diffraction measurements.

KW - residual stresses

KW - neutron diffraction

KW - welding

U2 - 10.1016/j.actamat.2008.05.007

DO - 10.1016/j.actamat.2008.05.007

M3 - Article

VL - 56

SP - 4417

EP - 4428

JO - Acta Materialia

JF - Acta Materialia

SN - 1359-6454

IS - 16

ER -