XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX''"> Using MSC.Fatigue
There are two basic rules for any fatigue analysis:
1. The accuracy of the inputs is critical to the acceptability of the answers.
2. Fatigue life estimates are always approximate, i.e., two results within a factor of two (2) of each other are essentially the same result.
Remember, to set up a fatigue job you need three (3) inputs:
1. Load-time histories for each concurrent time varying load case.
2. Individual FEA results for each independently time varying load case.
3. Appropriate materials properties.
The job setup requires the association of the first two inputs and the assignment of the third to the selected areas of the finite element model (nodes/elements) using MSC.Patran group facility. You will also need to define some analysis specific parameters such as a mean stress correction method and the stress/strain parameter.