Issue 78

D. S. Lobanov et alii, Fracture and Structural Integrity, 78 (2026) 207-219; DOI: 10.3221/IGF-ESIS.78.12

defects induced by a flat indenter are similar, as are the histograms of peak frequency distributions. Furthermore, the distribution patterns show similarities between samples cut along the weft and warp, with defects introduced by a spherical indenter and a «scratch ».

Figure 8: Plots showing the relationship between the cumulative energy of AE signals and time in compression tests

Figure 9: Frequency distribution histograms of the spectral peak of AE signals in compression tests.

Figure 10: RA-AF signal curves for the warp and weft of the samples in compression tests

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