I have a carbon fiber composite component that is often and repeatedly subjected to stress. When it was brand new, everything looked normal. After a week of use, there are what seem to be bubbles developing under the clear coat.
1) Why would there be bubbles developing under the clear coat? Wouldn't the manufacturing process of heating and vacuuming bagging have eliminated most of the air within the composite?
2) Does the presence of these bubbles indicate a manufacturing defect?
My suspicions are that these bubbles are merely a cosmetic defect as I can see them, which indicates that they are not in between the layers of unidirection fiber which actually gives the structure its strength. On the other hand, the presence of the bubble does make me wonder - are there possibly large voids within the structure? From what I understand voids weaken carbon fiber composites, correct?