Fusor Metal Adhesive, Bonding longs and long clamshells |
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Fusor Metal Adhesive, Bonding longs and long clamshells |
69_Lex |
Oct 31 2009, 07:49 AM
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#1
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Member Group: Members Posts: 52 Joined: 28-June 08 From: wyoming Member No.: 9,226 Region Association: None |
Has anyone had any good or bad experiences using Fusor Metal Adhesives? I'm considering using it to bond my outer longs on and the long clamshells on. Then using structural rivets to prevent the unzippering effect of the bonded surfaces.
Pros I've read 1. Metal adhesives shear strength is greater than spot welds or the sheet metal being bonded. 2. Provides corrossion protection on surfaces being bonded (bonded surface) 3. No warping of metals, unlike welding. Cons I've read 1. Bonded surfaces can unzip, which is why a spot weld or rivets ar needed along bonded seam. 2. Don't let it get into areas that you don't want bonded or filled. Any thoughts are appreciated. |
Joe Owensby |
Oct 31 2009, 09:35 PM
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#2
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JoeO Group: Members Posts: 527 Joined: 7-January 06 From: Spartanburg, SC Member No.: 5,385 Region Association: South East States |
Everything has its place. Adhesive joints are great, if they are used in applications that were designed to be adhesive joints. I have a 50' wingspan glider that I built that has quite a few of the structural joints in aluminum held together with epoxy. However, these joints were designed to be glued. As mentioned before, the key is also to have perfectly clean bare metal for the glue to adhere to. Anything less than perfectly clean, is perfectly worthless as far as strength goes.
I would use the adhesive you referenced to install outer panels that were not structural, with no worries. I would be careful using it to refab the longs, etc. If it were used correctly, it should be OK, but the key is how the parts are installed. The key to the strength of the glue is that it is extremely strong when loaded in shear (ie. pulling along the plane of the glue). The relatively large surface area of the glue provides the strength. When pulled perpendicular to the plane of the glue, it is nowhere as strong. In this case, the load is transferred to the edge of the glue, and can unzip it, as someone referenced. If the pieces you glue in are loaded incorrectly (for example at the edges) they could fail. I removed quite a few of the factory spot welds on my car, and they were all very strong. It was very, very hard to split the overlapping panels with a chisel unless most of the spot weld was drilled out. |
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