Dynamics of Fragmentation of Fused Quartz Rods
The dynamic fragmentation was studied in the impact experiments with quartz cylindrical rods using a gas gun. Impact leads to the formation of fracture surfaces, which produce an intensive light emission (mechanoluminescence ). Mechanoluminescence was registered by two Photo Multiplayer Tubes (PMT) connected with the oscilloscope. Mechanoluminescence was in form of impulses with typical rise time 2-5 ns and fall time 5-50ns. It was found that the impulse frequency was not decreases monotonically but there was some kind of bursts or avalanches and fragmentation process time is 3-4 orders longer than acoustic time (time needed for compression wave to travel along the specimen). We found that the distribution of intervals between luminescence impulses is a power law distribution.
Fractoluminescence scaling power law fragmentation
Sergey Uvarov Marina Davydova Oleg Naimark
Laboratory of PFC,ICMM UB RAS,Perm 614013,Russia
国际会议
北京
英文
1-6
2013-06-16（万方平台首次上网日期，不代表论文的发表时间）