Hi
I made a carbon front fender for my Husqvarna 701 Supermoto in a four part mould. The part of the mold that depicts the assembly area is cast from polyurethane.
 
I fill the mounting area of the front fender with a thickened resin before vacuuming.
I use about ¾ teaspoon chopped carbon fibre strands on 65 g of resin.

The result looks neat, but the assembly area is more brittle than I expected.
It sometimes breaks when I drill it. I am afraid it will break in rough use.
If possible, I do not want to build a new mould.
Any suggestions?
Regards
Frank

It's a nice approach, I like it. 

Are you vacuum degassing the cast section? It looks like it is full of air bubbles, which will drastic lower its strength.

Hi Hanaldo.
No, I did not degass it.
I mixed the chopped strands into the resin after mixing the AT30 in it.
Frank

+x

 

Frank - 12/24/2018 10:25:29 AM

+x

 

Hanaldo - 12/24/2018 9:46:38 AM

It's a nice approach, I like it. 

Are you vacuum degassing the cast section? It looks like it is full of air bubbles, which will drastic lower its strength.

Hi Hanaldo.
No, I did not degass it.
I mixed the chopped strands into the resin after mixing the AT30 in it.
Frank

I would make a separate angle like carbon part and then bond it in ,



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