Post-Processing

Use the Show Analysis Results tool to view the results of an analysis in the Analysis Explorer. View and animate results, add callouts, and compare results from different runs.

Results must be available before attempting post-processing.

  1. From the Friction Stir Welding ribbon, click the Analysis tool.
    Post-processing mode is activated.
  2. Open HyperView for detailed analysis of results.


Animate and Record Results

Use the Animation Toolbar that appears at the bottom of the modeling window to animate and record results.

Animate the Results

If you've previously run an analysis, click the Play button on the animation toolbar to animate the results.

Run an analysis. When complete, the animation toolbar is displayed at the bottom of the modeling window.
  1. Click the button on the animation toolbar to review the analysis. Click the button to pause the animation.
  2. Optional: Click the icon to change the animation settings.
  3. Right-click and mouse through the check mark to exit, or double-right-click.
Tip: Drag the slider on the animation toolbar to view a particular point during the analysis.

Record the Results

Capture to a video in .mp4 format by clicking the button on the animation toolbar.

Run an analysis. When complete, the animation toolbar is displayed at the bottom of the modeling window.
  1. If you haven't already done so, play back your results to get an idea of what you're about to record.
  2. Optional: If desired, click the icon to change the animation settings.
  3. Click the button on the animation toolbar to begin recording the motion results; the icon changes to red to indicate that it is recording. Click the icon again to stop recording.
  4. When the recording is finished, the video is automatically saved in the C:\Users\<yourname>\Documents\Altair\videos directory. It is automatically given a name constructed from the time stamp, i.e. recording2018.8.8_15.47.39.mp4.
  5. Right-click to exit review mode.
Tip:
  • The default behavior is continuous recording, but the recording will stop automatically if the playback option is set to Once rather than Loop.
  • To hide the workflow help, select File > Preferences, and in the Workspace category clear the Show workflow help checkbox.
  • To avoid recording the mouse cursor, click the button on the animation toolbar and press the Tab key to move the focus to the button. Then press the Spacebar to start or stop the recording.
  • Note that the video recorder captures everything in the region of the modeling window. Avoid obscuring or minimizing that window during the recording process.

Animation Options

The animation options on the Analysis Explorer allow you to start and stop the animation and adjust basic settings.

Option Description
Play/Stop Animation Animate the selected result.
Animation Speed Change the speed of the animation.

Animation Toolbar

Use the animation toolbar to play, record, and configure the animation.



Figure 1. Animation Toolbar
Animation Settings
Click to open the Animation Settings.
Play and Record/Stop Recording
Click the button to begin recording the results; the icon changes to red to indicate that it is recording. Click the icon again to stop recording.
Start Animation/Pause Animation
Click the button to start or pause the animation. Use the arrow buttons to jump the first or last frame in the animation.
Move to First/Previous/Next/Last Step
These buttons allow you to step through the animation frame-by-frame. If you hold down the Previous or Next button, it will auto-repeat. If you want to skip frames, use the Increment By feature in the Animation Settings; hold Ctrl to temporarily override this behavior.
Slider
Drag the slider on the toolbar to view a particular point during the analysis; use the arrow keys to move frame-by-frame through the animation.
Current Step
Displays the current time or frame. You can also enter a value to go to the nearest time/frame.
Note: The animation toolbar has Previous and Next buttons with an auto-repeat feature, allowing you to step through the animation frame-by-frame by holding down the button. In addition, the Animation Settings include an option to Reverse Playback.

Animation Settings

Modify the animation settings from the animation toolbar.



Figure 2. Animation Settings
Playback
Select whether to play the animation on a continuous Loop, Once, or Bounce (between forwards and backwards). Select the check box to Reverse Playback.
Display
Set the units for the slider to either Time or Frame.
Increment By
Increase the value in the counter to skip frames during playback. The reset button restores the default value of 1.
Speed
Drag the slider to change the speed of the animation.
Range
Select the Range checkbox to define and starting and ending frame for the animation. This allows you to limit the playback range to just a portion of the animation, making it easier to study behaviors in more detail. You can use the Ctrl key while clicking on the Start or End icons to jump to Range Start and Range End, respectively.
Note: For motion models, you can fit plots for the selected range by using the Ctrl key while double-clicking. Also, the paths of tracers will be trimmed to honor the specified range.
Scale Factor
Enter a custom value to change the scale of the animation. Generally the scale of a displacement is too small to see clearly, so auto scaling is enabled by default.
Recording Settings
The default Auto setting gives you an estimate of the duration of the recording at 30 frames per second. If your video plays back faster than you want, select Custom Duration to change the length of the video; this will adjust the frame rate to try to achieve the specified duration. The Custom Duration has a minimum value of 1 second, and maximum value of 30 seconds.

Animation Shortcuts

To Do this
Play and pause If the Play button is active, press the Spacebar.
Increment the slider

Use the arrow keys to move frame-by-frame through the animation, or position the cursor over the slider and use the scroll wheel.
Exit tool Right-click and mouse through the check mark to exit, or double-right-click.

Result Types

Option Description
Temperature

The flow stress of a material is a strong function of temperature and strain rate. In addition, key material characteristics such as grain size depend on temperature. Hence, understanding the temperature distribution is the key to quality friction stir welding.

The localized heating around the tool is generated by friction between the tool and the workpiece. Temperature data is used to determine where excessive heating occurs between the plate and welded plates. The temperature during friction stir welding should be well below the selected material melting point (around 400°C-480°C for AA7075).
Pressure This data provides information on the resulting loads on the tool surfaces. This critical data is used to predict tool deflection.
Velocity This data provides a detailed understanding of how material deforms and flow around the tool pin. The temperature is a strong function of the rotation rate and traverse speed of the tool.
Strain The strain plot represents a measure of how the material is deforming. The strain occurs mainly in the HAZ region. This contour help determines if the material will undergo recrystallization or not. Also high variations in strain value can result in poor strength.
Flow Stress This data is used to determine the tool deflection and wear. This tensor data contains the total stress arising from both pressure and deformation. On the tool walls, if the shear stress is larger than the normal stress, this will result in tool wear.