Figure 6

Normalized AE parameters and damage evolution stages for (a) Specimen No. 0-1, (b) Specimen No. 30-1, (c) Specimen No. 45-1, and (d) Specimen No. 60-1.

Normalized AE parameters and damage evolution stages for (a) Specimen No. 0-1, (b) Specimen No. 30-1, (c) Specimen No. 45-1, and (d) Specimen No. 60-1.