Variable amplitude events
usually contain large amount of data. The Function
Curve dialog lets you import text files containing the data
as load history curves. The data become available when defining a variable
amplitude fatigue event.To perform fatigue analysis:
Create one or more static studies. You must define at least one S-N curve for each material. Click the Fatigue SN Curves tab in the Material dialog box to define S-N curves.
Create a fatigue study and define its properties. Make sure to set the proper options before running the study.
Notice the events type shown with the name of the Loading folder in the COSMOS AnalysisManager tree. Right-click the Loading folder and select Add Event to define a fatigue event based on reference static studies and the selected event type. To change the event type, right-click the Loading folder and select Change event type.
Variable amplitude events
usually contain large amount of data. The Function
Curve dialog lets you import text files containing the data
as load history curves. The data become available when defining a variable
amplitude fatigue event.
Right-click Result options and select Define/Edit to request results at all nodes or at boundary nodes only. If the study is based on variable amplitude events, you can request the Rainflow matrix chart at the desired locations.
For variable-amplitude fatigue studies, right-click a fatigue event icon and select Plot 3D Rainflow matrix or Plot 2D rainflow matrix to plot a chart for the bins of the input load history
Run the fatigue study. If the results of a static study, used in defining an event, are not available, the program runs the static study automatically before running the fatigue study.
View results:
Double-click an icon in a results folder to display the associated plot.
To define a plot, right-click the Results folder and select the Define Fatigue Plot.
To list results, right-click the Results folder and select List Fatigue Results.
For studies with variable amplitude events, right-click the Results folder and select Define Matrix Charts to view Matrix Charts.
Click here for more result viewing options.
If you run a study before
meshing it, the program meshes the study automatically before running
it. You can also request to run the study by checking Run
analysis after meshing in the Mesh
PropertyManager.
When you run a study that
does not have any result folders, the software creates the folders and
plots specified in the Result
Options for the study type. If result folders are present,
the software updates the existing plots.