Figure 9

CI and CD thresholds of granite specimen in Test Case 1–1 (θ = 0°) determined by AE energy and AE hits: (a) CI and CD thresholds determined by AE count; (b) CI and CD thresholds determined by AE energy.

CI and CD thresholds of granite specimen in Test Case 1–1 (θ = 0°) determined by AE energy and AE hits: (a) CI and CD thresholds determined by AE count; (b) CI and CD thresholds determined by AE energy.