136
5 Projectile Penetrations into Coarse Aggregated UHPCC Targets
Fig. 5.30 Influences of
aggregate size on impact
crater volume, reprinted
from Wu et al. (2015b),
copyright 2020, with
permission from Elsevier
0
100
200
300
400
500
600
700
800
102.5 MPa
(121)
(676)
129.2MPa
(548)
(126)
110.7 MPa
125.6 MPa
(214)
(512)
(453)
(387)
Crater volume (cm
3
)
5-20mm
35-45mm
65-75mm
1-1 1-2 5-1 5-2
2-1 2-2
3-1 3-2
corresponding brittleness have a little increase with the enlarging of the coarse aggregate size, the corresponding average crater volumes decrease gradually from 507 to
337 and 167.5 cm
2 . The reason of which may be similar with the influences of coarse
aggregate size on the crater areas discussed in Sect. 5.3.3.2.
(2) Influences of the coarse aggregate volumetric ratio
Figure 5.31 illustrates the influences of corundum coarse aggregate volumetric ratios
on the impact crater volumes. It indicates that, the average impact crater volumes of
UHP-CASFRC targets with the aggregate volumetric ratio 45% (389 cm
3 ) are 23.3%
less than those of UHP-CASFRC targets with the aggregate volumetric ratio 30%
(507 cm
3 ) under the strike velocity of about 510 m/s. The reason may be similar with
the influences of the coarse aggregate size interpreted above.
(3) Comparisons between UHP-CASFRC and HSC targets
Figure 5.32 illustrates the comparisons of the crater volumes between the UHPCASFRC and HSC targets. It indicates that, the average impact crater volumes
Fig. 5.31 Influences of
aggregate volumetric ratio on
impact crater volume,
reprinted from Wu et al.
(2015b), copyright 2020,
with permission from
Elsevier
0
200
400
600
800
1000
1200
(479)
128.8 MPa
102.5 MPa
(512)
(453)
110.7 MPa
(387)
1-1 1-2
5-1 5-2
4-1 4-2
(299)
(676)
Crater volume (cm
3
)
Volumetric ratio 30%
Volumetric ratio 45%