material orientation for anisotropic material abaqus

[koolsid]

Hi all,
I am modeling an artery in abqus using Fung anisotropic material. I am not sure about the material orientation applied to the cylinder. I created CSYS. I applied material orientation through this CSYS but I am getting an error saying that some elements have missing property definations. Can anybody fix this problem.
Any help is appreciated.
Koolsid

[Jorgen]

It sound like you did not assign a section definition (e.g. *SOLID SECTION) to your analysis. I would check that first.

-Jorgen

[koolsid]

Thanks Jorgen.
I just run abaqus from the visual display. I assigned material defination from module>edit keyword tab. Can you please tell me how can I assign the solid section to it? It will be a great help. Thanks in advance.

[koolsid]

I assigned solid section but now i am getting an error saying "illegal floating point" how can I fix it?
Thanks in advance.

[Jorgen]

That error can mean almost anything

Did the simulation start correctly?

-Jorgen

[koolsid]

I think i did not have shear terms in my material. I added that. Now my program is getting aborted saying too many increaments. I made my mesh finer too.My matrial constants are
c=8.92kPa
b1=1.25
b2=2.46
b3=0.55
b4=0.36
b5=0.06
b6=0.08.
I made my shear terms big enough means gave value about10000 to prevent shear deformations. I want to buckle my modeld artery in abaqus by pressurizing it. It is doing nothing and getting aborted at 5 kPa.
Waiting for your reply.
Thanks in advance.

[Jorgen]

I am not sure why your simulation does not work. I would try with a simpler material model first, for example, the Neo-Hookean model.

-Jorgen