Hello MJ, appreciate your reply!

My model is gonna take a long time to run so I just wanna confirm a little bit.

Yes the large deflection is on for my model.

As I mentioned in the post, an ANISO material is created. But not all the bodies are oriented the same way. How can I define each of them properly? What I have done is followed here, plz help me to check if it makes sense.

Since the ANISO material property is input using APDL command snippet. But I did not include any coordinate system in the command snippet. Should I define the coordinate for the body in the "Details of ** section"? If so, do I still need to use element orientation to this body to gurantee the elements have their local coordinate system rotate with the whole structure? 

Thank you so much and expecting your professional advice!