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Determination of residual stresses in tailored welded blanks with thickness transition for crack assessment

Schwinn, Julian and Besel, Michael (2019) Determination of residual stresses in tailored welded blanks with thickness transition for crack assessment. Engineering Fracture Mechanics (208), pp. 209-220. Elsevier. DOI: 10.1016/j.engfracmech.2019.01.010 ISSN 0013-7944

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Abstract

Residual stresses play a major role in the characterization of welded structures. The Cut-Compliance-method uses fracture mechanics principles and delivers stress intensity factors caused by the residual stresses, which is convenient for the evaluation of components that contain a crack. As sheets with different gauge were friction stir welded (FSW) a geometry with thickness transition evolved. Hence, the required influence function for the Cut-Compliance-method was derived for specimens with thickness transition by means of finite element simulations with fracture mechanical analysis. In order to compute residual stress profiles for the geometry with thickness transition, a weight function solution has been determined as well. Consequently, experimental data in terms of residual stress profiles and corresponding stress intensity factor distribution are obtained and presented in the paper for a FSW butt joint of an AlMgSc alloy (AA5028-H116) with identical and different sheet thicknesses.

Item URL in elib:https://elib.dlr.de/126621/
Document Type:Article
Title:Determination of residual stresses in tailored welded blanks with thickness transition for crack assessment
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Schwinn, Julianjulian.schwinn (at) dlr.deUNSPECIFIED
Besel, Michaelmichael.besel (at) dlr.deUNSPECIFIED
Date:1 March 2019
Journal or Publication Title:Engineering Fracture Mechanics
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
DOI :10.1016/j.engfracmech.2019.01.010
Page Range:pp. 209-220
Publisher:Elsevier
ISSN:0013-7944
Status:Published
Keywords:Tailored welded blanks; Residual stress; Friction stir welding; Cut compliance method
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:fixed-wing aircraft
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Structures and Materials
Location: Köln-Porz
Institutes and Institutions:Institute of Materials Research > Metallic Structures and Hybrid Material Systems
Deposited By: Breitbarth, Eric
Deposited On:22 Feb 2019 11:28
Last Modified:06 Sep 2019 15:19

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