I'm trying to bond two 17”x17” aluminum plates with 3M AF163-2 structural adhesive. The plates are modified sulfuric acid anodized, primed with 3M EC 3960 adhesive primer within 4 hrs. after anodization , adhesive film applied and cured 250F/ 45psi 90min.
Lap shear test per ASTM D1002 gives...
A carbon – epoxy mold .200” thick was donated by an aeronautical composite manufacturer (we don't know exactly what resin and tissue was used to manufacture the mold). This mold has a .250” hole machined throw. We intend to laminate few parts (8-10) from fiberglass epoxy 350F autoclave cure...
I know some of you have a strong background in chemistry.
In our reparation process we are using Epocast 50A two component epoxy resin ( http://korsil.ru/pdf/50A1-946(US).pdf ). The resin has very good laminating properties but is too viscous to inject it with a syringe needle.
May I add a few...
During my last stage I was surprised to notice that bagging sequence learned at school (prepreg layup – oven/autoclave cure) is not exactly the same that is used in all aeronautic shops. More, now I saw a few of the same parts bagged without bleeder. Does it means that bleeder use is optional...
From time to time vacuum leak occure during autoclave cure cicle. Sometimes because bag bridging, or seal compound sliding or vacuum port bridging the bag crash, and sometimes unknown reasons. When inexpilcable bag puncture arrive we chalk it up against resin. I heard that during gelation...
I have a roll of silicone rubber sponge sheeting .150 AMS 3195 since ’99. I’m surprised to find that my sheet is curved and I need it plane to use it. Do you know any trick to make it strait (temperature, pressure, etc.)?
I’m interested to know the mechanism of formation of pinholes on a composite structure surface. Surface porosity is a problem that gets worse when adding lightning strike materials such as metal mesh.
