The Variables Influencing the Fatigue Behavior of Structural Weldments
by
F. V. Lawrence
S. D. Dimitrakis
W. H. Munse
Abstract
While there are many variables which affect the fatigue life of weldments, it could be said that the fatigue resistance of a weldment is really controlled by:
The presence or absence of weld discontinuities at the root of the critical notch.
The size of the weldment.
The magintude of the residual stresses which develop during fabrication.
In this article, we will compare and contrast the behavior of discontinuity-containing (“Nominal”) weldments and discontinuity-free (“Ideal”) weldments fabricated from thin (0.5-in.) or thick (2.0-in.) plates with or without significant fabrication residual stresses.
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