Fig. 1.

Photographs of samples of CFRP composites impacted face-on with energies of 25 J (sample A₁, on the left) and 50 J (sample A₂, on the right) as per ASTM D7136 standard. Samples were 65 mm × 65 mm laterally and had a thickness of 4.86 mm.

The red dashed line indicates the position of X-ray micro-CT B-scan shown in Fig. 2; the blue dashed line corresponds to the position of the LU B-scan shown in Fig. 4; the red circle shows a region in which data are used to calculate TGC coefficients (see Fig. 3).