Abstract
This study describes the influence of various weld imperfections (solidification crack, undercut and porosity) on fatigue crack propagation life due to combined axial and torsional fatigue loading. The stress intensity factors for different weld imperfections have been calculated by finite element method. The fatigue crack propagation life has been calculated using fracture mechanics approaches. It has been found that the weld imperfections significantly reduce the fatigue crack propagation life of welded joints and the torsional loading accelerates the initiation of fatigue crack significantly. The tensile residual stress, bending stress, torsional shear stress and dissimilar mechanical properties of base, weld and heat-affected zone (HAZ) metals also decrease the fatigue crack propagation life. However, the surface peening produces limited improvement in the fatigue strength of welded joints and the torsional load eliminates the greater part of the benefit. For the validation of the prediction, the results have been compared with available experimental data from the literature. A good comparison has been found between predictions and experimental results.
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 callDisclaimer: 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.
