hi, 
 i am trying to attach hinges to carbon composite for Double Cantilever Beam specimen using adhesive. lot of them are failing. Please suggest any alternate ways

Hi suman,

What adhesive and process are you using presently to bond the hinges to the composite? Is the bond failing between the adhesive and the composite or the adhesive and the metal?


A good heavy key of the surfaces to be bonded as well as through cleaning/de-greasing to ensure there are no surface contaminants which could otherwise affect the bond should form a good basis for the adhesive. 

What metal is the hinges made out of? 

is 3M scotch weld a good alternate for adhesive bonding between composites and metal. Let me know

You could consider using a methacrylate adhesive like Plexus.
I find these work really well for metal to composite bonding.

Hi Suman,

As Fasta suggests, a Methacrylate will give you a better bond as unlike an epoxy or polyurethane adhesive, a Methacrylate has an etching property and as such really bites into the bonding surfaces; they;re compatible with both the metal and the composite side of the bond.

We have a Methacrylate at Easy Composites (VM100B - https://www.easycomposites.co.uk/vm100-black-methyl-methacrylate-adhesive ) but as it is classifed as a Dangerous Good for shipping, there are some restriction on where we can send it.