PSI - Issue 2_B

Oleg B. Naimark / Procedia Structural Integrity 2 (2016) 342–349 Author name / Structural Integrity Procedia 00 (2016) 000–000

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localization modes. .

Fig. 8: Dynamic fragmentation of fused quartz

Fig. 9: Recovered fragmented rods

Fig. 10: Fragment size distribution

Fig. 11: Cumulative distribution function of time intervals

30

, tan

dis

ce mm

25

20

15

10

5

s time  ,

0

0

0,5

1

1,5

2

2,5

3

3,5

4

Fig. 12: The Taylor test data

3. Conclusion Scaling aspects and nonlinearity of damage-failure transition were explained as the consequence of subjection of damage kinetics to intermediate asymptotical (self-similar) solution. This solution has the nature of multiscale blow up dissipative structures, represents the set of collective modes of defects responsible for the damage localization stage. Spatial-temporal kinetics of nucleation and interaction of collective modes of defects allowed us to link qualitative different scenarios of multiscale damage-failure transitions in wide range of load intensities with dynamics of these modes. Original experiments were used to verify theoretical results and modeling: “in-situ” observation of crack dynamics in preloaded PMMA plates–transition from the steady to branching regimes and fragmentation; failure wave initiation in shocked fused quartz rods; multicenter spall failure in PMMA and ceramic