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Extracting element stiffness matrix for MAT9

Extracting element stiffness matrix for MAT9

Extracting element stiffness matrix for MAT9

(OP)
Looking for some help here.  I have a composite laminate in which each ply is represented by a layer of solid elements.  There are 8 plies total, with the stacking sequence being [0/45/-45/90]s.  A generic MAT9 card is used.  When the property field is assigned, a material CID aligned with the ply orientation is used.

Someone mentioned that there is a command that will print out the stiffness matrix for each property relative to a global or fixed coordinate system.  The reason I want this is that I need the ply stiffness matrix relative to a certain coordinate system to be used in another application.

Any help would be appreciated.

jetmaker

RE: Extracting element stiffness matrix for MAT9

If I well understood You want to calculate the property of the laminate on Nastran.
What you could do is to print out the property of a PCOMP card made of MAT8. (For Shell elements)

To do So you should set System Cell 361 to 1.
In this way you have computed and printed the equivalent PSHELL/MAT2 property.

Hope this help
Regards


 

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