To activate Seam Weld Fatigue Analysis, the Welds icon from the Fatigue
Modules should be selected.
Figure 1.
Fatigue Elements
Currently, shell elements (preferably CQUAD4 ) are supported for
the seam weld calculations
Fatigue Parameters
The Method, FE Model Units, Mean Stress Correction,
Certainty of Survival, and Thickness Correction are defined
though the Seam Fatigue Module dialog.
For more information on FKM mean stress correction,
see the FKM section under Uniaxial S-N Fatigue.
Figure 2.
Fatigue Material
The Material tool assists in
assigning material properties to parts/sets and
defining the SN curve.
User-defined materials can be created or selected from
the SN material database. Figure 3.
Fatigue Loads
Load histories (channels) can be imported, or Block
sequence loading can be created.
Events define the pairing of FEA subcases and load
histories.
Output
Output for Seam Weld Fatigue Analysis is
provided similar to regular fatigue analysis results. Damage
and Life results are available in the H3D file and can be
post-processed in HyperView.
Additionally, you can highlight the Toe, Root, and Throat
(adjacent elements) at which the fatigue results are
calculated by choosing the Toe/Root/Throat (s) results
option in HyperView. Figure 4. Example Cross Joint Fillet Weld Output for
Damage Figure 5. Example Cross Joint Fillet Weld Output for
Toe/Root/Throat elements
