Designing aluminium friction stir welded joints against multiaxial fatigue
Journal Title: Frattura ed Integrità Strutturale - Year 2016, Vol 10, Issue 37
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.
Authors and Affiliations
L. Susmel, D. Hattingh, M. James, E. Maggiolini, R. Tovo
Keywords
Related Articles
- EP ID EP117997
- DOI 10.3221/IGF-ESIS.37.27
- Views 58
- Downloads 0
Crack path for run-out specimens in fatigue tests: is it belonging to high- or very-high-cycle fatigue regime?
Fatigue tests run-out specimens up to 106 – 5x107 load cycles are used to determine the stress level named “fatigue limit”. Nevertheless, it is not clear what kind of fatigue cracking takes or will take place in t...
Research on parameters optimization of bilateral ring gear blank-holder in thick-plate fine blanking
To compensate for the poor quality of thick-plate blanking parts in cross-section, this paper suggests using the optimizing bilateral ring gear holder parameters to increase burnish zone and improve cutting preci...
Effective stress assessment at rectangular rounded lateral notches
Rectangular lateral notches are not common engineering components, thus little research attention has been directed towards the investigation of their stress field properties. Indeed, no in-depth investigations h...
Effect of the model’s geometry in fretting fatigue life prediction
This paper analyses the influence that the type of geometry used to obtain the stress/strain fields in a cylindrical contact has on fretting fatigue life predictions. In addition, this work considers the effect th...
Modification of creep and low cycle fatigue behaviour induced by welding
In this work, the mechanical properties of Waspaloy superalloy have been evaluated in case of welded repaired material and compared to base material. Test program considered flat specimens on base and TIG welded...