Uniaxial Fatigue Analysis, using S-N (stress-life) and E-N (strain-life) approaches for predicting the life (number
of loading cycles) of a structure under cyclical loading may be performed by using HyperLife.
Multiaxial Fatigue Analysis, using S-N (stress-life), E-N (strain-life), and Dang Van Criterion (Factor
of Safety) approaches for predicting the life (number of loading cycles) of a structure under cyclical
loading may be performed by using HyperLife.
The method implemented in OptiStruct is based on a research paper Fatigue Life Prediction of MAG-Welded Thin-Sheet Structures published by M. Fermér, M Andréasson, and B Frodin.
The method implemented in OptiStruct is based on a research paper Fatigue Life Prediction of MAG-Welded Thin-Sheet Structures published by M. Fermér, M Andréasson, and B Frodin.
Failure evaluation points differ from one weld type to another.
The following sections provide information about which locations of the weld elements are used
for failure evaluation in Seam Weld Fatigue Analysis. Figure 1 shows how the identification points are illustrated in
subsequent images.
Fillet
The weld toe and root locations are evaluated. Throat location is not evaluated.
Note: The arrows
in Figure 2 and Figure 3 indicate surfaces for evaluation (surface of the shell
elements adjacent to the weld element).