Fatigue

An automated fatigue calculator for large NASTRAN models is presented below.

Nastran models generate stress range pairs using MSC fatigue load case pairing.

All Fatigue Models that include the  a1,a2,a3,a4 coefficients from MilHdbk-5 are included.

An example deck setup is presented on the form.

Failure points are displayed superimposed on graphs of Min vs Alt, Max vs Life,