- Oct 23, 2007
- Ventura County, California, USofA.
When the aluminum is bent, the surface on the outside of the bend will stretch and the surface on the inside of the bend will compress. This happens whether the aluminum is bonded or not. If it's bonded at that point and you have stretching at the bond line, because the adhesive is weaker than the aluminum, of course the adhesive is what gives and it gives at the bond line because that is precisely where the greatest strain is taking place."the metal stretches beyond the ability of the ability of the adhesive to stretch"
Does this make sense?
The adhesive is actually being stretched in two axises: along the direction of stretch and along the direction of peel. So when you look at it that way it's no wonder that the joint will fail early