Influence of pulse shaper geometry on wave pulses in shpb experiments

• Autorzy: Panowicz R. , Janiszewski J. , Kochanowski K.

Identyfikatory

DOI

10.15632/jtam-pl.56.4.1217

• Języki publikacji: EN

Abstrakty

EN

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 highly 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.

Słowa kluczowe

EN

SHPB; pulse shaping technique; high-strain-rate testing; numerical analysis

• Wydawca: Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
• Czasopismo: Journal of Theoretical and Applied Mechanics
• Rocznik: 2018
• Tom: Vol. 56 nr 4
• Strony: 1217--1221
• Opis fizyczny: Bibliogr. 14 poz., rys.

Twórcy

autor

Panowicz R.

• Military University of Technology, Warsaw, Poland

autor

Janiszewski J.

• Military University of Technology, Warsaw, Poland

autor

Kochanowski K.

• Military University of Technology, Warsaw, Poland

Bibliografia

• 1. Chen W., Song B., 2011, Split Hopkinson (Kolsky) Bar: Design, Testing and Applications, Berlin, Springer
• 2. Chen W., Song B., Frew D.J., Forrestal M.J., 2003, Dynamic small strain measurements of a metal specimen with a split Hopkinson pressure bar, Experimental Mechanics, 43, 1
• 3. Chree C., 1886, Longitudinal vibrations of a circular bar, Quarterly Journal of Pure and Applied Mathematics, 21, 287-298
• 4. Follansbee P.S., 1985, The Hopkinson Bar in Mechanical Testing and Evaluations, ASM Handbook, 9th ed. ASM Int., Materials Park Ohio
• 5. Frantz C.E., Follansbee P.S., 1984, Experimental techniques with the split Hopkinson pressure bar, Proceedings of the 8th International Conference on High Energy Rate Fabrication, San Antonio, Texas, TX, 229-236
• 6. Frew D.J., Forrestal M.J., Chen W., 2002., Pulse shaping techniques for testing brittle materials with a split Hopkinson pressure bar, Experimental Mechanics, 42, 93-106
• 7. Gorham D.A., 1991, The effect of specimen dimensions on high strain rate compression measurements of copper, Journal of Physics, D: Applied Physics, 24, 8, 1489-1492, https://doi.org/ 10.1088/0022-3727/24/8/041
• 8. Grazka M., Janiszewski J., 2012, Identification of Johnson-Cook equation constants using finite element method, Engineering Transactions, 60, 215-223
• 9. Hallquist J.O., 2006, Ls-Dyna. Theoretical Manual, California: Livermore Software Technology Corporation
• 10. Naghdabadi R., Ashrafi M.J., Arghavanic J., 2012, Experimental and numerical investigation of pulse-shaped split Hopkinson pressure bar test, Materials Science and Engineering A, 539, 285-293
• 11. Nemat-Nasser S., Isaacs J.B., Starrett J.E., 1991, Hopkinson techniques for dynamic recovery experiments, Proceedings of the Royal Society, 435, 371-391
• 12. Ozel T., Sima M., 2010, Finite element simulation of high speed machining Ti-6Al-4V alloy using modified material models, Transactions of NAMRI/SME, 38, 49-56
• 13. Panowicz R., Janiszewski J., Traczyk M., 2017, Strain measuring accuracy with splitting- -beam laser extensometer technique at split Hopkinson compression bar experiment, Bulletin of the Polish Academy of Sciences Technical Sciences, 65, 2, 163-169, https://doi.org/10.1515/bpasts2017-0020
• 14. Pochhammer L., 1876, On the propagation velocities of small oscillations in an unlimited isotropic circular cylinder, Journal f¨ur die reine und angewandte Mathematik, 81, 324-326

Uwagi

EN

SHORT RESEARCH COMMUNICATION

PL

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2018).