Designing aluminium friction stir welded joints against multiaxial fatigue

L Susmel; DG Hattingh; MN James; E Maggiolini; R Tovo

doi:10.3221/igf-esis.37.27

Designing aluminium friction stir welded joints against multiaxial fatigue

L Susmel, DG Hattingh, MN James, E Maggiolini, R Tovo

School of Engineering, Computing and Mathematics

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Abstract

The present paper investigates the accuracy of the Modified Wöhler Curve Method (MWCM) in estimating multiaxial fatigue strength of aluminium friction stir (FS) welded joints. Having developed a bespoke joining technology, circumferentially FS welded tubular specimens of Al 6082-T6 were tested under proportional and non-proportional tension and torsion, the effect of non-zero mean stresses being also investigated. The validation exercise carried out using the experimental results have demonstrated that the MWCM applied in terms of nominal stresses, notch stresses, and also the Point Method is accurate in predicting the fatigue lifetime of the tested FS welded joints, with its use resulting in life estimates that fall within the uniaxial and torsional calibration scatter bands.

Original language	English
Pages (from-to)	207-214
Number of pages	0
Journal	Frattura ed Integrità Strutturale
Volume	10
Issue number	37
DOIs	https://doi.org/10.3221/igf-esis.37.27
Publication status	E-pub ahead of print - 13 Jun 2016

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10.3221/igf-esis.37.27

Frattura ed Integrità Strutturale Designing aluminium FSW welded joints against multiaxial fatigue

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title = "Designing aluminium friction stir welded joints against multiaxial fatigue",

abstract = "The present paper investigates the accuracy of the Modified W{\"o}hler Curve Method (MWCM) in estimating multiaxial fatigue strength of aluminium friction stir (FS) welded joints. Having developed a bespoke joining technology, circumferentially FS welded tubular specimens of Al 6082-T6 were tested under proportional and non-proportional tension and torsion, the effect of non-zero mean stresses being also investigated. The validation exercise carried out using the experimental results have demonstrated that the MWCM applied in terms of nominal stresses, notch stresses, and also the Point Method is accurate in predicting the fatigue lifetime of the tested FS welded joints, with its use resulting in life estimates that fall within the uniaxial and torsional calibration scatter bands.",

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AU - Maggiolini, E

AU - Tovo, R

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Y1 - 2016/6/13

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AB - The present paper investigates the accuracy of the Modified Wöhler Curve Method (MWCM) in estimating multiaxial fatigue strength of aluminium friction stir (FS) welded joints. Having developed a bespoke joining technology, circumferentially FS welded tubular specimens of Al 6082-T6 were tested under proportional and non-proportional tension and torsion, the effect of non-zero mean stresses being also investigated. The validation exercise carried out using the experimental results have demonstrated that the MWCM applied in terms of nominal stresses, notch stresses, and also the Point Method is accurate in predicting the fatigue lifetime of the tested FS welded joints, with its use resulting in life estimates that fall within the uniaxial and torsional calibration scatter bands.

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DO - 10.3221/igf-esis.37.27

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JF - Frattura ed Integrità Strutturale

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ER -

Designing aluminium friction stir welded joints against multiaxial fatigue

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