Eurocode 3’s Standard Curves and Theory of Critical Distances to Estimate Fatigue Lifetime of Steel Weldments

Luca Susmel

doi:10.4028/www.scientific.net/KEM.348-349.21

Paper Titles

Fretting Fatigue Phenomena on an all Aluminium Alloy Conductor
p.5

Reliability of Fatigue Bahaviour of Weld Metal
p.9

Cohesive Zone Modeling of Mode I Fracture in Adhesive Bonded Joints
p.13

The Use of the Singular Elastic Peak Stress Evaluated by FE Analyses for Fatigue Strength Assessment of Welded Joints
p.17

Eurocode 3’s Standard Curves and Theory of Critical Distances to Estimate Fatigue Lifetime of Steel Weldments
p.21

Behavior of Microbiological Influenced Corrosion of the Ship Plate Steel in Marine Environment
p.25

A New Approach for Critical Chloride Content in (Non)Carbonated Concrete
p.29

Cyclic Damage Evolution in a PMC Laminate
p.33

Effect of Triaxiality on Damage Parameters in Adhesive
p.37

HomeKey Engineering MaterialsKey Engineering Materials Vols. 348-349Eurocode 3’s Standard Curves and Theory of...

Eurocode 3’s Standard Curves and Theory of Critical Distances to Estimate Fatigue Lifetime of Steel Weldments

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.