Eurocode 3’s Standard Curves and Theory of Critical Distances to Estimate Fatigue Lifetime
of Steel Weldments |
| Journal |
Key Engineering Materials (Volumes 348 - 349) |
| Volume |
Advances in Fracture and Damage Mechanics VI |
| Edited by |
J. Alfaiate, M.H. Aliabadi, M. Guagliano and L. Susmel |
| Pages |
21-24 |
| DOI |
10.4028/www.scientific.net/KEM.348-349.21 |
| Online since |
September, 2007 |
| Authors |
Luca Susmel
|
| Keywords |
Multiaxial Fatigue, Steel Weldments, Theory of Critical Distances |
| Abstract |
This paper reports on the use of the Modified Wöhler Curve Method (MWCM) applied
along with the Theory of Critical Distances (TCD) to estimate fatigue lifetime of steel welded joints
subjected to both uniaxial and multiaxial cyclic loading. In a recent work [1] we have proved that
the above engineering method is highly accurate when calibrated by using standard fatigue curves
characterised by a probability of survival equal to 50%. In order to better check its accuracy and
reliability, in the present study our approach is systematically applied to a large amount of
experimental data by calibrating it using standard fatigue curves having a probability of survival
equal to 97.7%. This exercise allowed us to prove that the in-field application of such an
engineering procedure results in estimates which fully comply, from a statistical point of view, with
Eurocode 3’s recommendations. This result strongly supports the idea that our approach can safely
be employed to perform the fatigue assessment of real mechanical assemblies, with the advantage
over other existing methods that fatigue lifetime under any kind of fatigue loading can be estimated
by simply post-processing linear-elastic Finite Element Models. |
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