Originally Posted by simon do you have an idea if 'GLARE's are of any reasonable use in boatbuilding? Do you think that there is a possible low-tech approach for building glare panels that could improve fatigue resistance of aluminium? Location: netherlands Ough, very interesting FLM?s fibre metal laminates, here an excerpt from book mentioned. Glare is glass and Al sandwich (0.2 mm Al layers) its stronger and safer and has cost and weight savings over Al and Arall (aramid Al) sandwich witch was first and still used.
Both sandwiches have excellent damage tolerance and are used in airplane flooring cargo doors outer skins, bulkheads etc. The laminates sometimes replace double skins like in airplane flaps because of its low fatigue.
Milling and drilling may cause delamination as bending but pics show that may go a long way. Buckling in high sheer stress (always in the middle) is possible but the material can be joggled. Stretch forming and double curved sandwich panels are more difficult than monolithic materials but can be made in self forming moulds complete with stringers and internal doublers and cut outs with a vacuum mould autoclave. A chapter on all sorts of splicing and these materials have better lightning protection as Al or carbon. Fatigue on riveted joints chapter and Finite element modelling is elaborated on but I?ve not seen or heard of these materials in a program yet. I think it?s a interesting change although not first choice for the backyard boat builder, book goes back to the library in exchange for some general engineering books.
If you firmly believe this, then you should NEVER fly on a commercial airliner made by the likes of Airbus, Boeing or McDonnel-Douglas since all the aircraft they have produced in the last 30 years rely extensively on bonded aluminum structures that carry primary loads.
Etch, Alodine and then prime the aluminum substrate with mil-p-23377 primer, then bond while the primer is in 'green' cure, preferably between 12 and 24 hours. Generally speaking epoxy and methacrylates are perfect for joining aluminium to aluminium or aluminium to composite in a marine environment.

Good luck, by the way all the comments about moisture ingress through the epoxy are incorrect. But it does not address the long-term stability of the aluminum surface being bonded and therefore cannot insure the durability of the bond itself.
Passivation followed by (chromium) conversion is the only known method that will accomplish both these goals. The method also allows for easy inspection of the bond surface for detecting the presence of contaminants or aluminum oxide. Location: Gold Coast Australia Here is a complete specification for bonding aluminium from Hexcel Corp. Location: Gold Coast Australia Secondary Bond Firstly you need to define Secondary Bond.
In all the joints I've analysed or designed the bonded joint has been stronger then a joint using rivets or fasteners in the same space.
Location: The Netherlands I am surprised that methacrylate glues are not mentioned more. Many aluminium parts are succesfully bonded with methacrylates in marine, airospace and automotive environment. I have had some aluminium bonded parts in my osmosis tester (submerged, 60 degrees C) which never came apart. Polyester resin laminates achieve their highest strength when the bonds between layers of fiberglass are chemical or primary bonds as opposed to mechanical or secondary bonds. Abstract The adhesion-in-peel test was used to determine peel strength and adhesion characteristics of a cured-in-place silicone elastomeric joint sealant on aluminum substrates. Other materials to cover a wood Jon boat » Thread Tools Show Printable Version Email this Page Display Modes Linear Mode Switch to Hybrid Mode Switch to Threaded Mode Search this Thread Advanced Search Similar Threads Thread Thread Starter Forum Replies Last Post Welders ?!?
When making potentially dangerous or financial decisions, always employ and consult appropriate professionals. Glass to Aluminum cake and glass to Stainless Steel bonding in the manufacturing of glass and crystal furniture.

From aluminum to cast iron to stainless steel to titanium, Master Bond one and two component adhesive systems meet the challenging needs of metal bonding applications. A two component room temperature curing, black coloured, odourless, thixatropic polyurethane adhesive. This is ultimately better than 'sanding in' the resin and likely much more practical, especially if the bonded area is large. Temperature is a factor, mixing is more critical, and bondline thickness needs to be observed as well (1mm for Plexus).
The manufacturing process for polyester boats has been developed so that a chemical bond exists between the gelcoat and the laminate.
Because of the difference in curing chemistry, it is not possible to achieve a chemical bond between epoxy and polyester gelcoat. These job proven formulations are presently employed in applications ranging from design and production to repair, maintenance and field service. One reason for this is the ability of epoxy to form a stronger mechanical bond to a damaged laminate than polyester resin.
We developed some tests, to determine whether or not the mechanical bonds achieved between gelcoat and properly prepared, cured epoxy were strong enough to achieve a durable repair. The results showed that the silicone sealant had poor adhesive bonding to the untreated aluminum.
The first layer of the laminate is then applied to gelcoat, which has not completely cured. Plasma polymerization of hexamethyldisiloxane (HMDS) onto the aluminum was seen to move the locus of adhesive failure to being between the plasma film and the silicone. Plasma polymerization of HMDS with oxygen carrier gas produced excellent adhesion and cohesive failure in the silicone was observed.

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Comments Bonding aluminium to glass fibre

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