176
6 Impact Resistance of Basalt Aggregated UHP-SFRC/Fabric …
Bullet
Fig. 6.11 Critical perforation in Shot 1-8, reprinted from Peng et al. (2016), copyright 2020, with
permission from Elsevier
6.3.4 Recovered Bullet
During the penetrations, the brass jackets of the API bullets were all stripped from the
hard steel core by targets but only one steel core was found clung with a half jacket
in Shot 2-4. Figure 6.12a shows partly recovered hard steel core of the API bullets.
All steel cores suffered mass abrasions to some degree, and some of them were even
fractured. Figure 6.12b shows the typical recovered truncated-ogive nosed steel core
of bullet (the initial yield strength was 550 MPa) after the perforation test on no
coarse aggregated UHP-SFRC slab conducted by Sovják et al. (2015). It can be seen
that the steel core was not deformed or damaged except for some minor abrasions on
the surfaces of noses due to the high-speed frictions during the impact. Comparisons
between Fig. 6.12a, b indicate that, adding the high strength basalt aggregates into
UHP-SFRC material can obviously destruct the structural integrity of the hard core
of API bullets, and thus decrease the penetration efficiency.
Fig. 6.12 Recovered bullets from a present test, b test in Sovják et al. (2015)
6 Impact Resistance of Basalt Aggregated UHP-SFRC/Fabric …
Bullet
Fig. 6.11 Critical perforation in Shot 1-8, reprinted from Peng et al. (2016), copyright 2020, with
permission from Elsevier
6.3.4 Recovered Bullet
During the penetrations, the brass jackets of the API bullets were all stripped from the
hard steel core by targets but only one steel core was found clung with a half jacket
in Shot 2-4. Figure 6.12a shows partly recovered hard steel core of the API bullets.
All steel cores suffered mass abrasions to some degree, and some of them were even
fractured. Figure 6.12b shows the typical recovered truncated-ogive nosed steel core
of bullet (the initial yield strength was 550 MPa) after the perforation test on no
coarse aggregated UHP-SFRC slab conducted by Sovják et al. (2015). It can be seen
that the steel core was not deformed or damaged except for some minor abrasions on
the surfaces of noses due to the high-speed frictions during the impact. Comparisons
between Fig. 6.12a, b indicate that, adding the high strength basalt aggregates into
UHP-SFRC material can obviously destruct the structural integrity of the hard core
of API bullets, and thus decrease the penetration efficiency.
Fig. 6.12 Recovered bullets from a present test, b test in Sovják et al. (2015)