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Frequency Domain Fatigue Analysis

Fatigue results are requested for all nodes of the SCR finite element model, but over most of the structure LifeFrequency reports that fatigue lives are Infinite. In the program terminology this represents a predicted fatigue life of over 99,999 years. The shortest fatigue lives occur for hot spots in the touchdown region, as expected. The figure below plots the minimum predicted fatigue life in the touchdown region (note the log scale on the vertical axis).

Minimum Fatigue Life in Touchdown Region