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A linear static finite element analysis has already been performed with a load magnitude of 10,000 Newtons. To begin, read this model and results information into a new database using MSC Fatigue Pre & Post (referred to as Pre & Post from here on) or use MSC Patran. From the system prompt or a DOS window in a clean directory invoke Pre & Post or MSC Patran.
fXX or fatXX or fatigue where XX is the version number
p3 or patran
Note: | Pre & Post or MSC Patran can also be invoked from the Start menu on Windows workstations. In all cases, be sure that Pre & Post or MSC Patran is running from the working directory. |
After the graphical interface starts open a new database from File | New and call it keyhole. The model was run through an MSC Nastran analysis, so keep the Analysis Preference set to MSC Nastran when asked.
Import the Model
Select the Import toggle switch (Analysis in MSC Patran) on the main form. When the form appears, set the Action to Access Results, the Object to Read Output2, and the Method to Both (model and results). Click the Select Results File button and select the file simpleSN.op2. Click the Apply button. The model will then appear and you are ready to set up a fatigue analysis.
View the Stress Results
Before moving on to the fatigue analysis, first press the Results application switch on the main form to view the stress results from the MSC Nastran analysis. The Create | Quick Plot form is displayed. Go to the “Select Fringe Result” listbox and select Stress Tensor. Set the Quantity Option menu to Maximum Principal 2D. Click the Apply button and note the areas of high stress. The maximum principal stress appears to be about 333 MPa.
When you are done, press the Results switch again to close down the Results application form.
