PSI - Issue 32

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

14

5

Fig. 5. Luminescence of a quartz sample (cylinder) in the process of quasi-static destruction. The times in the photographs are relative to (1).

Fig. 6. The characteristic shape of the fragments: 1 – volumetric elongated (blue), 2 – in the form of plates (green), 3 – volumetric in the octahedral shape (red).

The resulting form of fragments distributions (see Fig. 7) is a consequence of various mechanisms of fragment formation. Despite this, for all samples, the cumulative fragments mass distributions have a slight inflection and were well described by power functions with a high approximation confidence of R 2 ~ 0.96. Earlier, in the works of the authors Davydova and Uvarov (2013), Davydova and et. al. (2014), Katsuragi and et. al. (2003), similar distributions were obtained.