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DOE-STD-3014-96
APPENDIX C
ultimate compressive strength of concrete (lb/in.2);
f'c
=
D
=
missile nominal diameter (in.);
W
=
missile weight (lb);
V
=
missile impact velocity (ft/sec).
Stone & Webster Formula (1976)1
Based on an extensive series of quarter-scale tests, using hollow steel pipe
missiles, Stone & Webster (Reference 6) developed an empirical formula where
the scabbing thickness, ts, is:
1
2
WV
3
ts
(C 6-10)
C
where:
C
=
coefficient based on ratio 2T/D;
T
=
missile wall thickness (in.);
D
=
missile outside diameter (in.);
W
=
missile weight (lb);
V
=
missile impact velocity (ft/sec).
The formula is limited to the following range:
2T
0.06 <
< 1.0
D
ts
75fps < V < 250fps
1.0 <
<3;
D
C-10


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