SS-T: 4100 SN Time - Import Loadcase - Channel Mapping

Import channels and create events automatically using a .csv file.

Prerequisites
Some features used in this tutorial are only available in the SimSolid Advanced version. Switch to Advanced to complete this tutorial.
Purpose
SimSolid performs meshless structural analysis that works on full featured parts and assemblies, is tolerant of geometric imperfections, and runs in seconds to minutes. In this tutorial, you will do the following:
  • Create SN Time Fatigue loadcase.
  • Import channels and create events automatically with a .csv file.
  • Define channel mapping for events.
  • Review results.
Model Description
The following model files are needed for this tutorial:
  • SNTime-ChannelMapping.ssp
  • ChannelMapping.csv
Figure 1.


The project (.ssp) file has the following specifications:
  • Material is set to Steel for all parts.
  • Multi-loadcase workbench is included. Learn more about creating multi-loadcases here.
  • Load cases with remote loads are included.

Open Project

  1. Start a new SimSolid session.
  2. On the main window toolbar, click Open Project .
  3. In the Open project file dialog, choose SNTime-ChannelMapping.ssp
  4. Click OK.

Review Model

  1. In the Project Tree, expand the Multi-loadcases 1 Analysis Workbench.
  2. Review the loads.
    Figure 2.


  3. Click (Results plot) and choose the desired plot to review the stresses for each loadcase.

Add Fatigue Material Properties

If an SN curve has already been assigned, skip this step. Check the assigned material properties by right-clicking Assembly in the Project Tree and selecting Show > Materials.

  1. In the main menu, click Settings > Material database.
    Figure 3.


  2. In the Generic Materials group, right-click Steel and select Copy from the context menu.
  3. Edit the copied material.
    1. Select Steel1 - Copy_0.
    2. Click Edit material.
  4. Add fatigue curves.
    1. In the editing field of the dialog, expand the Fatigue properties branch and click Add stress-life (SN) curve....
    2. Verify the Curve definition method is set to Estimate from UTS.
  5. Click Apply.
  6. Click Save.

Create SN Time Analysis

  1. On the main window toolbar, click (Fatigue analysis).
  2. In the drop-down menu, select SN Time.
    The new analysis appears in the Project Tree. The SN Time Workbench items are listed.
    Figure 4.


Import Loadcase and Channel Map

  1. In the Project Tree, open the Fatigue SN/EN Time Workbench.
  2. On the workbench toolbar, click (Import loadcase-channel map).
  3. In the dialog, for Map to, verify Multi-loadcases 1 is selected.
  4. Click Set Path and pick the path for the load history files.
    Figure 5.


    These can be rsp or rpc files.
  5. Click Import from CSV and select ChannelMapping.csv.
    Figure 6.


    Note: You cannot edit the events from the dialog. Make necessary changes to the .csv file before import.
  6. Click OK.

Review Channels

  1. In the Project Tree, double-click on a channel.
    The Channel group dialog opens and lists the channels available in the load history file, along with their plots and coordinates. You can cycle between them to view the plots.
    Note: You cannot edit channels from this dialog.
    Figure 7.
  2. Optional: Click on the column headers to sort the plot table by Time or Amplification Factor.
  3. Click Cancel to close the window.

Review Events

  1. In the Project Tree, double-click on an event.
    The Event setup dialog opens. You can edit channel mappings, scale, offset, gate range, and event repeats from this dialog. You can also add new Channel-loadcase mapping by clicking Add row.
  2. Keep the Channel scale as 1 for Event 1 and Event 2, as shown in the figures below.
    Note: Event 1 has default mappings as defined. Event 2 has manually defined mappings. The second channel is mapped to Loadase 1 and the first channel is mapped to Loadcase 2.
    Figure 8. Event 1


    Figure 9. Event 2


    Event 1 has default mappings as defined. Event 2 has user defined mappings; the 2nd channel is mapped to Loadcase 1 and the 1st channel is mapped to Loadcase 2.

Run Analysis

  1. On the Project Tree, open the Analysis Workbench.
  2. Click Solve.

Review Results

  1. In the Project Tree, Select the Fatigue SN Time 1 subcase.
  2. On the Analysis Workbench, select > Fatigue damage.
    The Legend window opens and displays the contour plot. The Events window opens and lists all events. You can plot damage for each event or plot cumulative damage.
    Figure 10.
  3. Pick info.
    1. On the Results Workbench toolbar, click (Pick info).
    2. In the modeling window, select points of interest.
    3. In the Pick info dialog, for Event, select Total from the drop-down menu to view cumulative damage, or select the individual Event of interest.
      Figure 11.