Hello Chandra, thank you for your confirmation! May I follow to ask one more question?

Since it is ANISO material, so I created an local coordinate system to define the x y & z material principle axes. In the end I want to extract the stresses in the local x, y and z elemental directions. However with the force increasing the whole body would rotate but the local coordinate system which defined the x, y &z axes, seemed not to rotate with the body.

Would the elements defined in this way have their elemental coordinate system to rotate with the body? I read some posts on elemental orientation that may work and I am wondering whether you could give me some guidance on it. Your help is greatly appreciated!