Perforation Thickness. - Continued

DOE-STD-3014-96

APPENDIX C

ultimate compressive strength of concrete (lb/in.2);

f'c

missile nominal diameter (in.);

missile weight (lb);

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:

(C 6-10)

where:

coefficient based on ratio 2T/D;

missile wall thickness (in.);

missile outside diameter (in.);

missile weight (lb);

missile impact velocity (ft/sec).

The formula is limited to the following range:

0.06 <

< 1.0

75fps < V < 250fps

1.0 <

<3;

C-10