Influence of pulse shaper geometry on wave pulses in SHPB experiments
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Military University of Technology, Warsaw
Submission date: 2018-03-22
Acceptance date: 2018-05-09
Online publication date: 2018-10-20
Publication date: 2018-10-20
Journal of Theoretical and Applied Mechanics 2018;56(4):1217-1221
Results of numerical analysis of the influence of pulse shaper geometry on wave signals in the split Hopkinson pressure bar experiment are presented. Five pulse shapers, i.e. square, ring, cross, star and disk ones have been analysed. It has been assumed that the disc pulse shaper is the reference geometry to assess the remaining types of pulse shapers. The results of numerical analyses have shown that pulse shapers with shapes different than disk are hi- ghly capable of minimizing high-frequency Pochhammer-Chree oscillations and, thus, reduce dispersion of waves propagating in the bar. The greatest damping ability has been observed while using the ring pulse shaper at both low and high impact velocities of the striker.
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