Create Events

Combine channels and subcases to create events.

Tip: You can rename a created event by double-clicking on its names in the bottom half of the Load Map dialog.

Create Time Series Events

Static subcases are supported for all fatigue calculations with a Time Series loading type.
  1. Click the Load Map tool.
    Figure 1.


    The Load Map dialog opens.
  2. Using the bottom half of the dialog, specify how to create events then click .
    The fatigue subcases that are read from the result file can be paired with load histories either manually or automatically.

    All pairs will be superimposed.

    Note: The number of time points should be the same if the pairs under the same event are superimposed.
    OptionDescription
    Manual Event Creation
    Figure 2.


    When Manual is selected and you click , an event is created without any load history and subcase pair assigned. You can drag and drop an equal number of load histories and subcases under an event.
    Note: The subcases should be dropped under an event first and then the load history channels.
    Auto Event Creation
    Figure 3.


    When Auto and Single Event are selected, before you click ,
    1. Select a subcase and a load history channel, or
    2. Select multiple load histories and subcase pairs that have an equal number of time points.

    Only one event is created when you click .

    Figure 4.


    When Auto and Multiple Events are selected, before you click ,
    1. Select multiple load histories and subcase pairs.

      The load histories must have an equal number of time points.

    2. Total number of events created = Number of channels selected / Number of subcases selected.
  3. Optional: Import an Event Mapper .csv.
    1. Verify the Analysis type is set to Time Data.
    2. In the Event definition area, click and select the event definition .csv file.
    Both FE Subcases and load history files should be present in the loadmap. On import of the Event Mapper .csv, FE subcases are automatically paired with load history channels present in the Loadmap. The CSV is organized by defining single or multiple Events based on the IDs of FE loadcases and load history channels. Load histories of the RPC/RSP format and multi-channel CSV are supported.
    Restriction: The load history files must be available in the LoadMap context before importing an Event Mapper file.
  4. Adjust the load magnitude, scale, offset, repeats, max gate range, and configuration of the events/subcases.
    Tip:
    • Apply the value of a parameter to all the events/subcases by right-clicking on a value and selecting Apply value to all events.
    • From the Subcase window, select any subcase increment.
  5. Activate the checkboxes of the events to be considered in the evaluation.
Figure 5.


The following equation depicts how LDM, Scale, and Offset values work together to scale the FEA stress tensor at time t.
Figure 6.
σ i j ( t ) = σ i j . F E A L D M ( P ( t ) S c a l e + O f f s e t ) MathType@MTEF@5@5@+= feaagKart1ev2aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq=Jc9 vqaqpepm0xbba9pwe9Q8fs0=yqaqpepae9pg0FirpepeKkFr0xfr=x fr=xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaeq4Wdm3aaS baaSqaaiaadMgacaWGQbaabeaakiaacIcacaWG0bGaaiykaiabg2da 9maalaaabaGaeq4Wdm3aaSbaaSqaaiaadMgacaWGQbGaaiOlaiaadA eacaWGfbGaamyqaaqabaaakeaacaWGmbGaamiraiaad2eaaaGaaiik aiaadcfacaGGOaGaamiDaiaacMcacaWGtbGaam4yaiaadggacaWGSb GaamyzaiabgUcaRiaad+eacaWGMbGaamOzaiaadohacaWGLbGaamiD aiaacMcaaaa@55EB@
Where:
σ i j ( t ) MathType@MTEF@5@5@+= feaagKart1ev2aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq=Jc9 vqaqpepm0xbba9pwe9Q8fs0=yqaqpepae9pg0FirpepeKkFr0xfr=x fr=xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaeq4Wdm3aaS baaSqaaiaadMgacaWGQbaabeaakiaacIcacaWG0bGaaiykaaaa@3C1E@
Results stress tensor at time t
σ i j . F E A MathType@MTEF@5@5@+= feaagKart1ev2aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq=Jc9 vqaqpepm0xbba9pwe9Q8fs0=yqaqpepae9pg0FirpepeKkFr0xfr=x fr=xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaeq4Wdm3aaS baaSqaaiaadMgacaWGQbGaaiOlaiaadAeacaWGfbGaamyqaaqabaaa aa@3CCF@
Stress tensor from static analysis
P ( t ) MathType@MTEF@5@5@+= feaagKart1ev2aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq=Jc9 vqaqpepm0xbba9pwe9Q8fs0=yqaqpepae9pg0FirpepeKkFr0xfr=x fr=xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaamiuaiaacI cacaWG0bGaaiykaaaa@391D@
The y point value of load-time history at time t