Hi, I made a part from carbon fiber, Kevlar and Lantor Soric using resin infusion and let it cure for a week. To test the strength, I broke the part and then I noticed that I can tear off Kevlar from carbon fiber just by hand. Is it normal?



Another weird thing I noticed is that parts I made by resin infusion are lighter, but also easier to break than parts made by hand layup using the same number of layers.

Here is another part I made by combining fiberglass and Soric. You see that the fiberglass layer is transparent, but when I start breaking the part with a hammer, the layer starts to separate from Soric and the individual fibers become visible. Then I can tear it off. I am confused because delamination wasn't possible with hand layup.

The parts have less resin than wetlay so you are not ripping through so much resin when you try to delaminate - remember at this point the material has already failed, so you are just ripping apart the resin, of which there is slightly less.

In terms of "easier to break" ,  In a scientific approach rather than hammer whacking, I would expect slightly better performance with a resin infused part as the fibres are generally better consolidated and compressed tightly together.   That assumes all other variables are equal.


Warren Penalver
Easy Composites / Carbon Mods - Technical Support Assistant