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Table 4.8 Mechanical impedance of the Hopkinson bar, hybrid and pure composites
Density Young’s Wave velocity Impedance ratio,
Materials Specifications Impedance (kg/s)
3
(kg/m ) modulus (GPa) (m/s) (%)
Silver steel Hopkinson bars 7850 200.00 5047.55 7967.76 Reference
1 G2/B3/G2 1850 19.11 3214.06 82.39 1.03
2 G2/J3/G2 1430 11.21 2799.97 221.92 2.79
3 G2/F3/G2 1560 13.14 2902.50 128.04 1.61
4 [G/B]3G 1870 18.52 3146.66 97.80 1.23
5 [G/J]3G 1420 11.00 2783.80 219.09 2.75
6 [G/F]3G 1510 12.32 2856.16 106.24 1.33
7 G7 1890 18.88 3160.74 168.93 2.12
8 B7 1780 15.39 2940.75 23.68 0.30
9 J7 1080 3.31 1750.17 148.47 1.86
10 F7 1160 3.70 1786.00 62.56 0.79
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