Include Page | ||||
---|---|---|---|---|
|
Include Page | ||||
---|---|---|---|---|
|
Mesh
Material Properties
The material properties for composite materials are different than typical isotropic materials, because some material properties depend on direction. Also, monocoque typically have a sandwich structure consisting of carbon fiber layups surrounding an aluminum core. The following steps show 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:
Ex = 8500000 psi
Ey = 8500000 psi
Ez = 1000000 psi
Vxy = 0.06
Vyz = 0.06
Vxz = 0.06
Gxy = 560000 psi
Gyz = 560000 psi
Gxz = 830000 psi
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
following video shows how to mesh the composite material and how to attach line bodies to surfaces.
HTML |
---|
<iframe width="600" height="338" src="//www.youtube.com/embed/P90NVdTkQJA?rel=0" frameborder="0" allowfullscreen></iframe> |
...