CATIA V5 FEA Tutorials.pdf
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CATIA V5
FEA Tutorials
Releases 12 & 13
Nader G. Zamani
University of Windsor
SDC
Schroff Development Corporation
www.schroff.com
www.schroff-europe.com
PUBLICATIONS
CATIA V5 FEA Tutorials
2-1
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Chapter 2
Analysis of a Bent Rod with
Solid Elements
2-2
CATIA V5 FEA Tutorials
Introduction
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In this tutorial, a solid FEA model of a bent rod experiencing a combined load is created.
No planes of symmetry exist and therefore simplifications cannot be made. Finally, the
significance of the von Mises stress in design equation is discussed.
1 Problem Statement
The bent rod, shown to the right, is clamped at one end and
subjected to a load of 2000 lb as displayed. The steel rod has a
Young modulus of 30E+6 psi and Poisson ratio 0.3 .
The nominal dimensions of the rod are also displayed below.
Although this problem is more efficiently handled with beam
elements, we propose to use solid elements.
There are two types of solid elements available in CATIA V5:
linear and parabolic. Both are referred to as tetrahedron
elements and shown below.
loaded end
loaded end
Clamped end
Clamped end
5 in
Tetrahedron Elements
Tetrahedron Elements
1 in
8 in
Cross sectional
Radius is 1 in
linear
linear
parabolic
parabolic
The linear tetrahedron elements are faster computationally but less accurate. On the other
hand, the parabolic elements require more computational resources but lead to more
accurate results. Another important feature of parabolic elements is that they can fit
curved surfaces better. In general, the analysis of bulky objects requires the use of solid
elements.
2 Creation of the Part in Mechanical Design Solutions
Enter the Part Design workbench which can be
achieved by different means depending on your CATIA
customization. For example, from the standard windows
toolbar, select File > New
.
From the box shown on
the right, select Part. This moves you to the part design
workbench and creates a part with the default name
Part.1.
2-3
Analysis of a Bent Rod with Solid Elements
In order to change the default name, move the curser to Part.1 in the tree, right click and
select Properties from the menu list.
From the Properties box, select the Product tab
and in Part Number type wrench. This will be
the new part name throughout the chapter. The tree
on the top left corner of the screen should look as
displayed below.
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From the tree, select the XY plane and enter the Sketcher
.
In the Sketcher, draw a
circle , and dimension it . In order to change the dimension, double click on the
dimension on the screen and in the resulting box enter radius 1.
Your simple sketch and the Constraint Definition
box used to
enter the correct radius are shown below.
Leave the Sketcher
.
From the tree, select the XY plane and enter the Sketcher
.
Draw the spine of the bent
rod by using Profile
and dimension it to meet the geometric specs. In the Sketcher,
the spine should match the figure below on the right. Upon
leaving the Sketcher
, the screen and the tree should be as
shown below.
2-4
CATIA V5 FEA Tutorials
You will now use the ribbing operation to extrude the
circle along the spine (path). Upon selecting the rib
icon
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, the Rib Definition box opens. Select the
circle
as
indicated. The result is the final part shown below.
Regularly save your work.
(
Sketch.1
)
and the spine
(
Sketch.2
)
3 Entering the Analysis Solutions
From the standard windows tool bar, select
Start > Analysis & Simulation > Generative Structural Analysis
There is a second workbench known as the Advanced Meshing Tools which will be
discussed later.
The first thing one can note is the presence of a
“Warning” box indicating that material is not
properly defined on wrench. This is not
surprising since material has not yet been
assigned. This will be done shortly and
therefore you can close this box by pressing
“OK”.
A second box shown below, “New Analysis
Case” is also visible. The default choice is
“Static Analysis” which is precisely what we
intend to use. Therefore, close the box by
clicking on “OK”.
Plik z chomika:
nneil
Inne pliki z tego folderu:
Catia - Tutorial 1.pdf
(441 KB)
Catia - Tutorial 2.pdf
(532 KB)
Catia - Tutorial 3.pdf
(1201 KB)
CATIA V5 FEA Tutorials.pdf
(1769 KB)
Inne foldery tego chomika:
Catia 5.7 - Tutorials
Complete CATIA Tutorials
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