Three regimes of dynamic fragmentation of shells

The effect of the diameter of shells of structural steel 45Cr on the parameters of the cumulative numerical distribution of fragments by mass and the cumulative mass distribution of fragments by length has been studied. It is found that the statistical fragment distributions by mass for shells of different diameters are described well by exponential relation, whereas the cumulative mass distributions of fragments by length are described by power functions. The exponents in these relations depend on the shell diameter. Plotting the cumulative mass distribution of fragments by length allows one to relate the mechanisms of dynamic fracture with fragmentation regimes, which differ in the parameters of the power relation characterizing the formation of fragments of the basic spectrum.