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This test lets you check analysis results for a thick
cylinder under internal pressure, in the context of a static case. You will
use 3D meshes. |
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Reference: AFNOR technique, SFM Paris, Guide de validation des progiciels de
calcul de structures, SSLL 04/89, pp.116-117, 1990. |
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Specifications
Geometry Specifications
Inner radius:
a = 0.1 m |
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Outer radius:
b = 0.2 m |
Height:
h = 20 mm |
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For symmetry reasons,
only one quarter of the cylinder is modeled. |
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Analysis Specifications
Young Modulus (material):
E = 2 x 105 MPa |
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Poisson's Ratio (material):
ν
= 0.3 |
Mesh Specifications:
Size = 10mm |
Restraints (User-defined):
The normal direction is restraint for upper, downer and side faces |
Loads (Pressure):
P = 60 MPa on the inner face |
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Results
- The analytical solution of this problem is:
For both components of the stress tensor within the part cylindrical
axis:
For the component of a displacement using the same axis:
- The computed results are presented in the table below:
Position in space |
Image type |
Reference value |
Computed value |
Linear tetrahedron (TE4) |
Parabolic tetrahedron (TE10) |
Linear hexahedron (HE8) |
Parabolic hexahedron (HE20) |
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Inner quarter |
Stress principal tensor component (with C3 component
filter) [MPa] |
-60 |
-56.8 |
-60.1 |
-52.7 |
-59.8 |
Stress principal tensor component (with C1 component
filter) [MPa] |
100 |
104 |
100 |
104 |
101 |
Translational displacement vector
[m] |
59 x 10-6 |
57.2 x 10-6 |
57.2 x 10-6 |
57.1 x 10-6 |
57.2 x 10-6 |
Outer quarter |
Stress principal tensor component (with C3 component
filter) [MPa] |
0 |
-0.413 |
0.068 |
-1.02 |
0.0432 |
Stress principal tensor component (with C1 component
filter) [MPa] |
40 |
39 |
40 |
39.3 |
39.7 |
Translational displacement vector
[m] |
40 x 10-6 |
36.2 x 10-6 |
36.4 x 10-6 |
36.3 x 10-6 |
36.4 x 10-6 |
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To Perform the Test:
The
Thick_cylinder_TE10.CATAnalysis document presents a complete analysis,
computed with a mesh formed of parabolic tetrahedron elements (TE10).
The
Thick_cylinder_HE20.CATAnalysis document presents a complete analysis,
computed with a mesh formed of parabolic hexahedron elements (HE20).
To compute the case with linear tetrahedron elements (TE4)
and linear hexahedron elements (HE8), proceed as follow:
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Open one of the CATAnalysis documents.
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Enter the Advanced Meshing Tools workbench.
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In the specification tree, double-click on the mesh:
The Global Parameters dialog
box appears.
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Select the Linear element type.
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Compute the case in the Generative Structural
Analysis workbench.
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