HL-T: 1010 Uniaxial Strain-Life (E-N)

In this tutorial you will:
  • Import a model to HyperLife
  • Select the EN module and define its required parameters
  • Create and assign a material
  • Assign load histories for scaling the stresses from FEA subcases
  • Evaluate and view results
Before you begin, copy the file(s) used in this tutorial to your working directory.

Import the Model

  1. From the Home tools, Files tool group, click the Open Model tool.

    Figure 1.
  2. From the Load model and result dialog, browse and select HL-1010\Hook.h3d for the model file.
    The Load Result field is automatically populated. For this tutorial, the same file is used for both the model and the result.
  3. Click Apply.

    Figure 2.
Tip: Quickly import the model by dragging and dropping the .h3d file from a windows browser into the HyperLife modeling window.

Define the Fatigue Module

  1. Click the arrow next to the fatigue module icon and select the EN tool from the list of options.

    Figure 3.
    The EN dialog opens.
  2. Define the EN configuration parameters.
    1. Select Uni Axial as the method.
    2. Select MPa for the FE model units.
    3. Select Signed von for the stress combination.
    4. Enter a value of 0.5 for the certainty of survival.
    5. Select SWT for the mean stress correction.
    6. Select NEUBER for the plasticity stress connection.
    7. Select Worst for the layer selection.
    8. Select Time Series for the type of loading.

    Figure 4.
  3. Exit the dialog.

Assign Materials

  1. Click the Material tool.

    Figure 5.
    The Assign Material dialog opens.
  2. Activate the checkbox next to the part HOOK_solid.
  3. Click the My Material tab.
  4. Click .
    A new material named Mat_EN("n") is created.
  5. Set the Elastic Modulus to 70000.
  6. Set the Standard Error of Log(elastic strain) (SEe) to 0.0.
  7. Set the Standard Error of Log(plastic strain) (SEp) to 0.0.
  8. Click Plot & Save.

    Figure 6.
  9. Right-click on the newly created material and select Add to Assign Material List.
  10. Click the Assign Material Data tab.
  11. For HOOK_solid, select Mat_EN("n") from the Material drop-down menu.
    Tip: Preview the EN plot by clicking .
  12. Accept the default parameters in the Assign Material Data tab.

    Figure 7.
  13. Exit the dialog.

Assign Load Histories

  1. Click the Load Map tool.

    Figure 8.
    The Load Map dialog opens.
  2. From the Channel Type drop-down menu at the top of the dialog, select Time Data.
  3. Click in the Choose File field and browse for load1.csv.
  4. Click to add the load case.
  5. Optional: Click to view a plot of the load.

    Figure 9.
    Tip: Expand the width of the dialog to view a clearer picture of the plot.
  6. On the bottom half of the dialog, verify Auto is selected for event creation.
  7. Select Subcase 1 and Subcase 2, then click to create an event.
  8. For Configuration, select Superposition.
  9. Select and drag-and-drop the load 1 (block1) channel into the Channels column of the event.
  10. Right-click the newly added Block 1 <load1> channel, and select Apply value to current event from the context menu.
  11. For Repeats, enter 100.
  12. For Subcase 1, enter 5 for Scale.
  13. Activate the Event_1 checkbox.

    Figure 10.
  14. Exit the dialog.

Evaluate and View Results

  1. From the Evaluate tool group, click the Run Analysis tool.

    Figure 11.
    The Evaluate dialog opens.

    Figure 12.
  2. Optional: Enter a name for the run.
  3. Click Run.
    Result files are saved to the home directory and the Run Status dialog opens.
  4. Once the run is complete, click View Current Results.
  5. Use the Results Explorer to visualize various types of results.

    Figure 13.

    Figure 14.