> Since fibre strength significantly exceeds that of the matrix (epoxy), damage usually occurs in the matrix before the fibres for laminate composites. In some instances, this is relatively easy to detect; snapped fibres protruding from the object’s surface. Yet more microscopic damage – something which can spread through the object – is harder to detect even though it can significantly reduce the mechanical properties of the composite.
https://www.resinlibrary.com/knowledge/article/can-carbon-fi...
> Since fibre strength significantly exceeds that of the matrix (epoxy), damage usually occurs in the matrix before the fibres for laminate composites. In some instances, this is relatively easy to detect; snapped fibres protruding from the object’s surface. Yet more microscopic damage – something which can spread through the object – is harder to detect even though it can significantly reduce the mechanical properties of the composite.