Browse Publications Technical Papers 2001-01-0086

A Robust Structural Stress Procedure for Characterizing Fatigue Behavior of Welded Joints 2001-01-0086

This paper summarizes some recent results on fatigue evaluation of welded joints. A mesh-insensitive structural stress procedure was discussed and employed to characterize geometric stress raiser effects at welded joints. Existing weld fatigue data published in the open literature were analyzed using the structural stress parameter. Even though the fatigue data were from various industries, materials, and gauge thicknesses, the structural stress based interpretation of the existing data has demonstrated the following:
  1. (1)
    The mesh-insensitive structural stresses serve as an effective stress parameter to correlate fatigue S-N data and provide the data transferability between various joint types
  2. (2)
    The large number of weld S-N curves classified per joint type with the current weld category based approach can be significantly reduced, for instance, potentially to a single curve for weld toe failure.
  3. (3)
    Such a structural stress parameter can be effectively used to gain insight on fatigue behavior of welded joints.


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