![]() ![]() The added compressive forces counteract the tensile forces trying to separate the joint when the joint is closer to the headstock. bar, etc., tapered or notched so as to form a scarf joint with another piece. ![]() The strings on a guitar also act like the post tensioning cables used in concrete structures to reduce deflection under load adding more strength through compression. SCALE a vessel in which water is heated, or on the curIaoe of metals. ![]() In the 2x4 example with the cut near the concrete block, the 2x4 reacts only in compression and shear and the tensile forces pulling the wood apart are lower. The closer the joint is to the headstock, the lower the bending moment and the more the stress of string tension wants to act in compression. I know the "glued joint is stronger than the wood itself" crowd will argue the point but it's not going to work due to the stresses on the neck at that point (shear and tensile) being magnified (lever action) by the bending moment at mid-span. All my knowledge and research in woodworking lends me to believe that a single piece of wood used for the neck and angled headstock would be stronger than a scarf jointed neck and angled headstock. I think you know what the outcome will be. Now do it again except cut the 2x4 at mid-span and stand on it. Cut a notch halfway through the 2x4 near the end and stand on the 2x4 mid-span. lay a 2x4x8 across 2 concrete blocks at either end leaving a 6' span in the center. Most scarf joints are at or near the headstock where there is less bending and deflection. The reason you never see it done that way is. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |