A Comparison of Methods for Predicting Weldment Fatigue Life under Variable Load Histories
by
J. -Y. Yung
F. V. Lawrence
Departments of Metallurgy and Civil Engineering
Abstract
Cruciform joints were fatigue tested under SAE Bracket variable loading history. Tube-to-plate welds were fatigue tested under bending and torsion loading conditions. Fatigue test results were compared with predictions made using the total fatigue life model which predicts the total fatigue life of weldments by combining estimates of fatigue crack initiation life and the fatigue crack propagation life. The comparisons of the total fatigue life model and other prediction models were also made.
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