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Fatigue Plot

The Fatigue Plot PropertyManager allows you to plot the results of a fatigue study.

Plot Type

  • Life. Shows the number of cycles (for constant amplitude event studies) or the number of blocks (for variable amplitude studies) that cause fatigue failure at each location. The plot is based on SN curves and the alternating stress at each location. A block is the full load history of a variable amplitude event (including the number of repeats).

Available only when the fatigue study is defined with one event.

  • Damage. This plot shows the percentage of the life of the structure consumed by the defined fatigue events.

  • Load Factor. Shows the load factor of safety for fatigue failure at each location. A load factor of safety of 3.5 at a location indicates that the defined fatigue event will cause fatigue failure at this location if you multiply all loads defined for the static study by 3.5.

Available only when the fatigue study is defined with one event.

  • Biaxiality Indicator. Plots the ratio of the smaller alternating principal stress (ignoring the alternating principal stress nearest to zero) divided by the larger alternating principal stress. A value of –1.0 indicates pure shear, and a value of 1.0 indicates pure biaxial state.

This plot can help you determine a fatigue strength reduction factor for the study.


  • Include title text. Includes a title for the plot.

  • Associate plot with name view orientation.

    • Associate with current view . Allows you to associate the current view with the active plot. In the graphics area, create the desired view for the plot and click . The custom view is given an automated name.

To plot a fatigue result:

  1. In the Simulation study tree, right-click the Results folder in a fatigue study and select Define Fatigue Plot.

  2. In the Fatigue Plot PropertyManager, do the following:

    1. In Display, select one of the plots (life,damage,factor of safety, or biaxiality indicator ).

    1. Under Property, do the following:

      • Select Include title text and type a name to include in title text.

      • Select Associate plot with name view orientation. Select a name from the drop down menu or create a custom view and click .

  3. Click .

Related Topics

Fatigue Plots

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