Abstract
AbstractFatigue tests on welded small‐scale specimens often do not show a distinct residual stress influence. An exception is longitudinal stiffeners, which are therefore frequently used to study the influence of welding residual stresses on fatigue. The results are not directly transferable to other weld geometries because the residual stress distribution depends on the weld geometries. In the presented investigation, fatigue tests on multilayer K‐butt weld and longitudinal stiffener specimens were performed. The tests were carried out in the as‐welded and stress‐relieved conditions at different load ratios. Initiation of macroscopic cracks was detected using digital image correlation. This allowed determining the influence of welding residual stresses on the initiation of macroscopic cracks, crack propagation and total fatigue life for both investigated weld geometries.
Highlights
As welding residual stresses are superimposed to fatigue loads, they affect the stress ratio
The influence of the applied stress ratio on the fatigue strength is diminished in presence of residual stresses
Fatigue tests have been conducted on the K-butt weld and longitudinal stiffener specimens, in as-welded andstress-relieved conditions
Summary
As welding residual stresses are superimposed to fatigue loads, they affect the stress ratio. The stress-relieved specimens show longer crack initiation periods, and the S-N curve has a shallower slope than in the as-welded condition.
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Fatigue & Fracture of Engineering Materials & Structures
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
