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Symmetry Type
When you define shell properties for laminate layup-type shells, you can specify the layer repetition pattern. Use the drop-down list under Symmetry Type on the Shell Property Definition dialog box. You can select one of these options:
No Symmetry—The layers are not repeated.
Symmetrical—The layers are repeated in reverse order.
Antisymmetrical—The layers are repeated in reverse order, and the orientation is also changed.
For example, a three-layer laminate would change as follows:
No Symmetry
a b c
a b c c b a
a b c -c -b -a
The dialog boxes require that you complete a table that defines the layers in your laminate. Each line in the table represents either a ply or sub-laminate of the shell property being defined. Note that the row numbers decrease as you go down the list since plies are traditionally numbered from the bottom up.
Return to Laminate Layup.