Abstract: | Conclusions Analysis of the energy distribution in the transmission of a shock pulse to a metal tube through an intermediate element shows
that the efficiency coefficient kef, the ratio of the energy in the head of the transmitted pulse to the impact energy, depends on parameters such as the mass
and rigidity of the intermediate elements, the magnitude of the added mass, and the tube rigidity. If a circular plate is
used as the intermediate element, then kef increases with increase in plate thickness until it is 0.2 of the tube diameter. Further increase in the plate thickness
leads to increase in energy dissipation uncompensated by reduction in the striker recoil coefficient.
The presence of an added mass reduces kef, on account of increase in both the energy dissipation and the recoil of the striker.
Increasing the tube rigidity — for example, by increasing its cross-sectional area — reduces the efficiency of shockpulse
transmission as a result of increase in the striker recoil coefficient and increase in the proportion of energy in the oscillating
tail of the elastic pulse.
It remains to thank E. N. Sher for useful discussions of the experimental results.
Institute of Mining, Siberian Branch, Russian Academy of Sciences, Novosibirsk. Translated from Fiziko-Tekhnicheskie Problemy
Razrabotki Poleznykh Iskopaemykh, No. 1, pp. 89–97, January–February, 1998. |