Bike Frame Project Questions


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FrameFudger
FrameFudger
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Hi,

Got my tubes made, been using 100gsm hi-mod UD CF. next step is to jig them and epoxy the joints together and then fillet the joints, also need to epoxy carbon fibre to a titanium bottom bracket shell I am using...

Bottom bracket Shell

Will be wrapped in pre-preg UD CF. Want to make sure the bond between the titanium and CF is stronger than the just the pre-preg resin. So which epoxy to use?

Tube joining

Tubes will be mitred and then fit flush to each other. Once they have been glued I will then be wrapped further pre-preg UD CF around the joints, so the epoxy needs to be generally strong with a little flex, however will not be the only structural element taking force and load.

I was looking at the ET515 Epoxy Adhesive, but I am not sure if this is the most suitable?

http://www.easycomposites.co.uk/products/structural-adhesives/semi-flexible-15min-epoxy-adhesive.aspx

If not what would you suggest?

Joint filleting

Prior to wrapping the joints in further UD CF I need to fillet the joint so there are no sharp acute angles which could create a void after wrapping and curing.


Similar to this...

http://applemanbicycles.com/wp-content/uploads/2013/12/KoenFilletHTP1040089.jpg



What filler \ epoxy combination would you suggest, as this isn’t structural the lighter the better.

Look forward to your responses.


Cheers,

Andy



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