I need help on creating a 3D version of this plain weave in AUTOCAD. Is it possible? Please need some help. Thank you in advance..

Yes it is possible.  One option is to create a path for one typical weave and sweep a circle along that path.  Array the result.  Copy the array, rotate it then position as required.  Trim as necessary.  

Just for fun I took a look at it and you can find the result in the CAD Blocks : 3D_PLAIN_WEAVE.dwg.
In fact I wanted to determine the exact geometry of one bend wire to be used in the 2 directions to have them touching each other.
I turned around in the workshop and didn't find an example so I switched to the 2D ---> 3D design to verify it ( I didn't find the good one at the first try ).
Ask for more especially if 3D design is not OK for you.

So, have you created your weave yet?  Let's see what you've done.

Is it possible to use a rectangle or square for in sweeping the path?? My actual fibers are flat and rectangular in shape.

Yes you can !
You can even create a spring with eather a circular or rectangular shape, Just try !
Use the command HELIX with a lot of properties that you can modify afterward with the properties control pannel ( CTRL + 1 ) to create a path and use the command SWEEP to create your shape 3D along it.
You can find whaterver you want in the Autocad documentation that should be in PDF form in your PC.
Find it in the directory : (C)\Program files\Autocad XXX or Autodesk\ ............ with a name like : acad_acr.pdf ( Autocad Command Reference ) containing ~2800 pages including a 185 pages index at the end. 

Yes you can and when you are done your weave would look something like this in a top down view.


John Connor2011-10-20 13:24:43