RE: Shear Webs - always vertical grain?
Our hobby is full of terms that are incorrect if the true definition of the words are followed. For instance, CG (Center of Gravity) is an incorrect term. We are not seeking the Center of Gravity, we are seeking the balance point, but the term CG sounds unique and savvy, so we continue to use the term improperly.
Ditto shear webs. The wing is trying to crush itself as it bends, it is therefore important that the grain runs vertically, which is the strongest orientation in order to compensate for the destructive forces. Yes, there is a slight amount of shear involved, but I doubt nearly as much as the force that is bending the wing.
Shear web is the incorrect term, but in this instance, I do not know what the correct term would be. Any mechanical engineers out there that do know?
I don't read the entire thread when RCU sends me a message and a URL in order to reach a thread that the software thinks that I am interested in, so I do miss a lot of the comments that preceded mine. Most of us form opinions based upon the concensus of opinions that we encounter. Even though I may be repeating someone elses comments (unknowingly), it never the less adds to the concensus, one way or another.
Ed Cregger