Adams Advanced Package > Adams Durability > Exporting Data > Exporting Data for MSC.Fatigue

Exporting Data for MSC.Fatigue

With MSC.Fatigue, you can predict the life or damage of your flexible components using service loads from an Adams simulation. Adams Durability provides a convenient interface to transfer results between MSC.Fatigue and Adams for flexible bodies. Note that the modal neutral file (MNF) of the flexible body does not have to contain stress modes to use the MSC.Fatigue interface. You can import modal stresses from MSC.Nastran into MSC.Fatigue using MSC.Patran. These stresses or strains can come from the MSC.Nastran .out or .xdb file. These can also be grid- or element-based stresses or strains.
The MSC.Fatigue interface in Adams Durability relies on:
■MSC.Nastran to provide the finite/super-element model of the flexible component.
■MSC.Patran to import the model and stress or strain from MSC.Nastran for MSC.Fatigue.

To export data for MSC.Fatigue:

1. From the Durability menu, point to MSC.Fatigue, and then select Export.
2. Complete the dialog box as described in MSC.Fatigue Export Dialog Box.
3. Select OK.

Running MSC.Fatigue from Adams Durability

MSC.Fatigue with MSC.Patran can process MSC.Nastran .xdb .op2 files that contain element or grid-point modal stresses.

To complete the loading information in MSC.Fatigue from Adams Durability:

1. In MSC.Patran, use the Group Modify menu to modify the default group of all grids and elements created in the MSC.Patran database.
2. Remove the members that are MPC-type (grids connected to RBE elements).
Modal stresses are not available for those members.
3. In the MSC.Fatigue Loading Information window, select Time History Manager to create a PTIME database of the DAC files.
4. Load all of the DAC files with the Job Name prefix that was specified in theMSC.Fatigue Export Dialog Box.
5. In the PTIME - Load Time History window, set Load Type to Scalar.
6. Set Units to none.
7. Set Results Type to Static.
8. In the Number of Static Load Cases text box, enter the number of modes for the flexible body.
9. Set Fill Down to ON to complete the Load Case ID, Time History, and Load Magnitude columns in this window.
The loading information section is now complete. You will also need to complete the material properties section before you can submit your MSC.Fatigue job.