This may be a bit of a silly question but I'm new to designing with composites and I'm not that familiar with that is commonly available so please feel free to correct me or make a recommendation as you see fit.
I'm looking to have a structural part fabricated for some testing. This E-glass-epoxy laminate will be subjected to in-plane loads and shearing forces, and as such my layup is intended to be [45/-45/0/45/-45/0/45/-45/0]s. The issue that I am running into is that I will require this laminate be symmetric about its mid plane as I do not want there to be any coupling between extensional and bending deformations. I realize that with a biaxial fabric [45/-45] you cannot just flip layers over to reverse the stacking sequence as flipping over a [45/-45] fabric results in the same [45/-45] stacking sequence and not the desired [-45/45]. Moreover, all the multi-axial fabrics (both biaxial and triaxial) that I have come across in catalogs only seem to come in one stacking orientation and they don't seem to provide a reverse stacking option. Compounding this issue I haven't been able to find unidirectional fabrics cut to only the 45 degree or -45 degree orientation out of which I could successfully achieve my layup.
I currently feel as though I have no way of achieving the laminate symmetry I will require however the textbooks I have read talk about symmetric laminates with angle-ply as if they are common place and I believe there must be a solution to this problem that I am not aware. To clarify further, the part I am looking to fabricate is about 12 feet long and will require rectangular layers cut to be 3ft by 12ft. Moreover I would really like to avoid the use of fabric splices if possible.
If you needed to construct this laminate what would you recommend for fabric selection? Are there E-Glass fabrics available which provide for symmetry in angle-ply laminates. Perhaps my scan of the marketplace wasn't thorough enough.
Thanks in advance for the help!