Canaboo
An epoxy matrix is about 95% mechanical bond, hemp is full of natural oils especially the raw hemp fiber (that I used). I shouldn't need to state this but, you know that smell when you open the bag, that's the oils making that smell.
As a result of these 2 facts you can safely assume that hemp will never be fully adhered to the epoxy matrix. It can move within the matrix. I'll offer you an easy tensile test as well. Take one strand of hemp and pull it apart with your hands. It's not easy but you can do it, or at least I can. Now take 1 strand of carbon fiber and try the same thing. The carbon strand should cut your fingers off before it breaks. It also has nothing on it to inhibit the bond.
Trust me, I wanted hemp to work, I used to own/operate a head/hemp shop in the Keys and I really wanted hemp to work, which is why I use it as a money layer. No one wants it to be functional in this regard more than me.
It simply is not suitable for advanced composites as stand alone structure.
That said...do whatever you want. If you have some magic touch and it works for you sweet. If I were doing that though, I would expect to be doing a lot of warranty work.
Andy