axisymmetric filament wound shell

[addmenot]

Hi,
i have model an axisymmetirc fw shell, in patran and using Nastran as a solver, i used the ctriax6 element.The problem is how to define the material properties. I know the angle which the fiber made with the meridian of the shell, but the material property form required E11,E22,E33,NU12,NU23,NU31 and G13. I know the Ef, Et, Vft and Gft.

Q1-Do i need to calculate the E11,E22,E33,NU12,NU23,N31 and G31 for each element seperately, based on the angle which it make with the meridian. or E11=Ef E22=Et etc.

Q2-if yes, than what is the THE value present in CTRIAX6 entry shows?

Q3-Does any body has a sample code for this type of shell.

Amir

 

[SJLeemans]

You should be able to get this information from the NASTRAN manual. Each element has a description with all of the theory and technical parameters. If you can't find it, call MSC tech support - they will gladly assist you. They are good people.

Typically, you specify the properties of a single lamina - the data you happen to have; and then you define the laminate structure - angles of the layers. The program does the rest.

I hope that this helps....