For sure the epoxy's strength is important. An epoxy resin is probably more suitable for the OP's application than for example a polyester resin, or an acrylic adhesive.BWD wrote: ↑Wed Nov 29, 2017 2:59 pmthe resin's strength is always in play.If your layup design does not cater for strain in a certain direction, then the resin's strength will come into play.
imagine using sikaflex instead of epoxy.
That stuff sticks quite well, you would never get it off the fibers, but you couldn't make a mast of it, could you?
Granted, the difference with many epoxies might be 10% or less, but it is a difference, that could let your mast be 1mm thinner or a few hundred grams lighter.
But if you look at the different epoxy resins that are suitable for wet layup applications, i.e. low viscosity, long pot life, their modulus should not be the deciding factor.
The OP's question was whether the epoxy's modulus will have a significant impact on the final laminate's stiffness.
The answer is still that with a proper layup schedule the reinforcement modulus will have the most effect.
The resin may contribute maybe 1%.