Visualizing Principal Stresses
![](../icons_C2/common/areference.gif) |
Stress principal tensor symbol images are used to
visualize principal stress field patterns, which represent a tensor
field quantity used
to measure the state of stress and to determine the load path on a loaded
part.
Stress principal tensor symbol Image objects belong to Static Case Solution objects sets.
At each point,
the principal stress tensor gives the directions relative to which the part is in a state of pure tension/compression
(zero shear stress components on the corresponding planes) and the values of
the corresponding tensile/compressive stresses.
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This task shows how to
generate Stress principal tensor symbol images on part geometries.
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You can use the sample24.CATAnalysis
document. Before You Begin:
Compute the solution: for this, click the Compute icon .
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1. Click the Principal Stress icon
.
The Stress principal tensor symbol image is displayed, and a Stress
principal tensor symbol Image object appears in the specification tree under the active Static Case Solution objects set.
![](images/5btTreePrincipal.gif)
You can
visualize the Stress principal tensor symbol image in different ways by modifying
the Custom view modes. To do this, you open the View menu and select
Render Style -> Customize View option. The
principal values stress tensor distribution on the part is visualized in
symbol mode, along with a color palette:
![](_themes/v5r5/ul1.gif) | At each point, a set of three directions is represented by line
symbols (principal directions of stress). |
![](_themes/v5r5/ul1.gif) | Arrow directions (inwards / outwards) indicate the sign of the
principal stress. The color code provides quantitative information. |
![](_themes/v5r5/ul1.gif) | Here the "All Absolute" option is selected meaning that the absolute value of
each principal stress is taken into account for each color distribution. |
2. When the mouse cursor is passing over tensor symbol
representations, their principal values
are displayed.
![](images/aImageImagePrincipalCursor.gif)
3. Click on a tensor symbol to obtain a steady display.
4. Double-click the Stress principal tensor symbol object in the
specification tree to edit the image.
The Image Edition dialog box is displayed.
![](images/aaPanelSolutionPrincipalStress.gif)
![](_themes/v5r5/ul1.gif) | Display on Deformed Mesh option, |
and the following tabs:
![](_themes/v5r5/ul1.gif) | Visu (how): |
![](_themes/v5r5/ul1.gif) | Criteria (what mathematical object type): |
![](_themes/v5r5/ul1.gif) | Filters (what) |
![](_themes/v5r5/ul1.gif) | Selections
(only available if you installed the ELFINI Structural Analysis
product) |
As you change the Visu option type, the name of the Stress
principal tensor symbol object in the specification tree is modified (the option type is appended
to the name).
In addition, the following buttons are available:
![](_themes/v5r5/ul1.gif) | Symbol: press this button to open the Symbol Editor dialog box
(only available if you installed the ELFINI Structural Analysis
product) |
![](images/aaPanerlSolutionStaticPpalSymbol.gif)
![](_themes/v5r5/ul1.gif) | Axis System: press this button to display the Image Axis System dialog
box (only available if you installed the ELFINI Structural Analysis
product).
You can use the Cartesian, Cylindrical or Spherical coordinate system.
If you activate the Global axis type, the default axis is
used. |
![](images/aaPanelSolutionStaticDispAxis01.gif)
If you activate the Manual type option, you will be able to
define manually the axis origin and coordinate definition.
![](images/aaPanelSolutionStaticDispAxis02.gif)
You can also use the User type option. You will then put
the part into the Show mode (right mouse button on Link Manager
in the specification tree), display and if needed edit the definition of
the axis you can now select on the part.
5. Click OK to exit the
different dialog boxes.
You can use the right mouse click (key 3) on a Stresses Principal
tensor feature in the specification tree and select the
option called Activate / Deactivate to turn the corresponding image on
or off.
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![](../icons_C2/common/ainfo.gif) |
Products Available in
Analysis Workbench
![](images/iconDocEST.gif)
The ELFINI Structural
Analysis product offers the following additional features with a right
mouse click (key 3) on a Stresses Principal tensor object:
Report: This icon generates a report in .html and .txt formats.
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