Abstract
The purpose of this paper is to make clear the influence of yield stress on the fatigue strength of non-load-carrying fillet welded joints. First of all, brief descriptions about relations between the actual maximum stress considering weld residual stress and the stress range are given, and the combined effect of stress ratio and residual stress is shown. Then, using published fatigue test results, the effect of yield stress on the fatigue strength is studied.In the first step, the results, whose actual maximum stresses are inferred to reach yield stress, are dealt with, and an expression of fatigue strength is obtained. Then, in the next step, the whole data are treated. Finally, the fatigue strength is expressed as follows : Δσ= 33680·σr-0.2282·NF-0.3071 +47.76·σr-0.5508·NF-0.1249· (σr-σmax') where Δσ is the stress range in MPa, σr is the yield stress in MPa, NF is the number of cycles to failure and σmax' is the actual maximum stress considering residual stress in MPa.Based on the equation above mentioned, the effect of yield stress on the fatigue strength of welded joints is discussed. The most important finding is ; that, in the case of high tensile residual stress, the fatigue strength of welded joints tends to decrease with increase in yield stress.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
More From: Journal of the Society of Naval Architects of Japan
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.