Orthotropic properties in cylinderical coord system

[Amiga500]

Hi everyone,

I've a problem properly orientating a composite material in a cylinderical coordinate system, to explain:


The composites material orientation system is:

1 - longitudinal
2 - transverse
3 - through thickness.

For a Cartesian coord system, this corresponds to:

1 - x-axis
2 - y-axis
3 - z-axis

Which is OK.



But a cylindrical coordinate system, the internal mapping is:

1 - Radius-axis
2 - Theta-axis
3 - Z-axis

Which would mean for a composite the longitudinal material properties are mapped to the through-thickness axis, the transverse material properties mapped to the longitudinal axis and the through thickness material properties mapped to the transverse axis.


How do I change this mapping around to correctly reflect the material properties.




Thank you for your time.

Brendan

 

[rstupplebeen]

I always just did the transformations on the material properties. I hope this helps.

Rob Stupplebeen

 

[Amiga500]

Thanks for the reply Rob.

I had to bite the bullet and make a separate material.


I think its pretty weird there isn't the two or three lines of code necessary to change the internal axis designation from a conventional cylindrical coordinate system to one suited to composites.

 

[vumat721]

In CAE, create a rectangular coordinate system in your part, then in the Property module, use the "Assign --> Material Orientation" option.