PSI - Issue 32

Irina A. Bannikova et al. / Procedia Structural Integrity 32 (2021) 10–16 Author name / StructuralIntegrity Procedia 00 (2019) 000 – 000

15

6

Fig. 7. Cumulative distribution of fragments by mass is greater than a certain given one. Logarithmic axes.

We analyzed the time intervals between fractoluminescence pulses obtained by a photomultiplier. The Fig. 8 shows the cumulative distributions of the number of time intervals N time greater than some specified from the time intervals timp between the pulses of the entire signal (for samples No. 3 and the second part of the pulse for sample No. 5, presented in Fig. 4). The distributions of N time (t imp ) are also described by a power law. The results agree with the data by Davydova (2014) obtained under dynamic loading of quartz rods. The presence of a power function allows them Davydova (2014) to make an assumption about the nature of the process of fragile fragmentation as a process of self-organized criticality Naimark and et. al. (2017).

Fig. 8. Cumulative distributions of the number of time intervals (N time ) greater than some specified from time intervals (t imp ) between pulses of the entire signal, see Fig. 4.