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Problem Specification |
Mesh
Material Properties
The material properties for composite material are different than typical isotropic materials, because different directions have different material properties. Also, monocoque typically have a sandwich structure consists of carbon fiber and aluminum core. Steps blow shows how to enter orthotropic properties into Ansys.
T300 Weave
Double click Engineering Data
Add a new material by click into the text box, and name the material "T300 weave"
To enter an orthotropic material property, go to Linear Elastic > (Drag) Orthotropic Elasticity onto the new material. A lists of property information will appear in the Property Outline as shown below:
Here are the corresponding properties for this material:
E1 = 8500000 psi
E2 = 8500000 psi
Ez = 1000000 psi
Gxy = 560000 psi
Gxz = 830000 psi
Gyz = 560000 psi
Vxy = 0.06
Vyz = 0.06
Vxz = 0.06
This type of composite is weaved, so you have to define that as well, go to Physical Properties > (Drag) Density and Ply Type on to the new material.
In Property out line select Woven  from the pull down menu.
Next step, we need to define the stress limits and tsai-wu constants for failure analysis.
Expand Strength  > (Drag) Orthotropic Stress Limits and Tsai-Wu Constants on to the new material, and the properties are shown below:
5250 Core
Repeat the steps above to enter the properties for 5250 Core. The values are displayed in figure below:
Steel for the Suspension Links
Suspension links are normal isotropic materials. I have purposely made it really stiff, so we can see more deformation on the monocoque. Here are the properties:
Attach the Suspension Link & Mesh
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Mesh
The following video shows how to mesh the composite material and how to attach line bodies to surfaces.
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<iframe width="600" height="338" src="//www.youtube.com/embed/P90NVdTkQJA?rel=0" frameborder="0" allowfullscreen></iframe> |
Go to Step 4: Physics Go to Step 4 - Mesh and Setup