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This task shows you how to create a
stiffener by specifying creation directions. |
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Open the Stiffener1.CATPart document. |
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1. |
Select the profile to be
extruded, that is Sketch.6 (located in the Part Body entity). This open profile has been created in a plane
normal to the face on which the stiffener will lie.
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About Profiles
| You can use wireframe geometry
as your profile. |
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| Clicking the icon
opens the Sketcher. You can then edit the profile. Once you have done
your modifications, the Stiffener Definition dialog box reappears to let
you finish your design. |
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If you need to use an open profile, make sure that
existing material can fully limit the extrusion of this profile |
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2. |
Click the Stiffener icon . The
Stiffener
Definition dialog box is displayed.
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Two creation
modes are available:
| From side: the extrusion is performed in the profile's plane and the
thickness is added normal to the plane. |
| From top: the extrusion is performed normal to the profile's plane
and the thickness is added in the profile's plane. |
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The option "From side" is the default option.
The application previews a stiffener which thickness is equal to 10mm.
The extrusion will be made in three directions, two of which are opposite
directions. Arrows point in these directions.
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3. |
Uncheck the Neutral Fiber option.
The extrusion will be made in two directions only.
To obtain the directions you need, you can also click the arrows. Note that you can
access contextual commands on these arrows. These commands are the same as those available
in the dialog box.
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4. |
Check the Neutral Fiber option again.
This option adds material equally to both sides of the profile. |
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5. |
Enter 12 as the thickness value.
This thickness is now evenly
distributed: a thickness of 6mm is added to each side of the
profile.
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Optionally click Preview to see the
result. |
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6. |
Click OK. The stiffener
is created. The specification tree indicates it has been created.
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If you click the Selection field and select another sketch,
CATIA immediately creates the Stiffener. |
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Clicking the
icon
opens the Sketcher. You can then edit the profile to modify your
stiffener. Once
you have done your modifications, you just need to quit the Sketcher. The
dialog box is closed and the icon
is activated. |
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"From Top" Stiffeners
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The "From
top" option lets
you create stiffeners from a network as illustrated below. You can, if
you wish, create this stiffener by working on Body.2. Prior to doing so,
ensure that Sketch.8 is the current object). |
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Figure 1: Sketch.8
includes several lines. |
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Figure 2: With the
option "From top" on, the extrusion is performed normal to the profile's plane
and the thickness is added in the profile's plane. Note also that
the resulting stiffener is always trimmed
to existing material. |
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There are two ways of
defining the thickness.
| The "Neutral Fiber" option adds the same thickness to both
sides of the profile. You just need to specify the value of your
choice in "Thickness 1" field and this thickness is evenly
added to each side of the profile. |
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| Conversely, if you wish to add different thicknesses on both sides
of the profile, just uncheck the "Neutral Fiber" option and
then specify the value of your choice in "Thickness 2"
field. |
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The creation of
"from top" stiffeners is never done with respect to the creation
order of the profile. |
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Whatever the creation order of
Line.1, Line.2 and Line.3.... |
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....the stiffener looks like this: |
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