Can you help me with the syntax to define the composite material property for a tube which is oriented along x axis and how can i define the stack up combining 2 different layers?.
And Also, How can i define the element orientation because it keeps on changing for the tube?
Composite shell section is defined this way:
*SHELL SECTION, COMPOSITE, ELSET=..., ORIENTATION=...
thickness_1, , material_1, orientation_1
thickness_2, , material_2, orientation_2
...
The first orientation is global, the other ones are for each layer. Orientations can be defined this way:
*ORIENTATION, NAME=..., SYSTEM=RECTANGULAR/CYLINDRICAL
a_x, a_y, a_z, b_x, b_y, b_z --> coordinates of points a and b (x,y,z)
1/2/3 --> local axis about which an additional rotation is performed, optional for rectangular coordinate systems
alpha --> angle (in degrees) of that additional rotation, optional for rectangular coordinate systems
For a rectangular coordinate system, a is a point lying on the local X axis while b lies on the local XY plane but not on the X axis. A right-hand system is assumed. For a cylindrical coordinate system, points a and b are on the local Z axis.