The Paton Welding Journal, 2003, №10

2003 №10 (16)

2003 №10 (18)

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The Paton Welding Journal, 2003, #10-11, 117-121 pages

Effective notch stress method in comparison with other methods in fatigue design of welded structures

A.F. Hobbacher

University of Applied Sciences, Wilhelmshaven, Germany

Abstract
Structures loaded by fluctuating forces are susceptible to fatigue damage. Besides the classical component testing, several calculative assessment methods have been developed. Most commonly used is the nominal stress method, which is based on the average stress in the section to be verified. With the oncome of the finite element method (FEM), more universal methods could be developed. The new method of effective notch analysis refers directly to the notch, at which a fatigue crack initiation is expected. On the basis of Neuber's theory and of more than 80 fatigue test series containing more than 1000 test specimens, it can be shown that the weld notch can be replaced by a fictitious, but consistent radius. For steel this radius is 1 mm. This method has been introduced to the IIW fatigue design recommendations.
Keywords: welded joint, fatigue, notch stress, structural steel

References

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Suggested Citation

A.F. Hobbacher (2003) Effective notch stress method in comparison with other methods in fatigue design of welded structures. The Paton Welding J., 10, 117-121.

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