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Adhesive
EA E-40HT
strength tapers off pretty fast around 40 degree celsius
DP420
Etched Aluminum Strength Test: 4500 psi
Couldn’t find temp to % strength chart
DP460
FPL Etched Aluminium Shear Strength: 31 N/mm2 OR 4500 psi
Couldn’t find temp to % strength chart
Loctite - Hysol E‐120HP
room temp cure
Tensile strength of 41 N/mm^2
Aluminum abrasion and acid etched lap shear strength 33 N/mm^2 (4800 psi)
100% strength even at 40 degrees Celsius
Tube and metal prep
Aluminum etching and Alodine coating to prevent corrosion and increase bond strength
West System 860 Aluminum Etching Kit
DuPont Acid Etch and Alodine solutions
Submerge Aluminum in etch solution, then submerge in non-diluted Alodine solution
Aluminum stock for insert
Check for appropriate lengths
Bond length increases linearly with bond strength
Gap 0.004 - 0.012 in for hot bonding
Gap 0.008 in for cold bonding
Carved aluminum, tapped for fitting a bearing insert
create shoulder only for grabbing in tensile test
In MIT paper, flashbreaker tape was used to add thickness at the end of the insert to create equal spacing and center insert.
Materials
x1 45552 (Depends on Dynamics decision for rod end size) CF Tube (60in)
Produces x12 5-in test tubes
Aluminum Rod (for milling our own insert, alloy and site unknown)
Some kind of acid etch kit (not necessary but good for testing bond strength variable)
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