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Untitled - Sciencemadness Dot Org

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RDX<br />

7.3 Shock Hugoniot.”<br />

8. SENSITIVITY<br />

8.1 Drop Weight Impact Height.<br />

8.5 Spark Sensitivity.<br />

Electrode<br />

150<br />

Density Shock Hugoniot”<br />

khm3) (mm/d<br />

1.799 U, = 2.78 + 1.9 U,<br />

*Computed from the isothermal volume<br />

compression data. Two RDX phases<br />

were observed in the course of determin-<br />

ing its isothermal volume compression.<br />

The shock Hugoniot tabulated is that<br />

for the orthorhombic form described<br />

previously in Sec. 4.1. Another RDX<br />

polymorph, Form III, occurs at pres-<br />

sures of 4.4 GPa. The volume change<br />

between the two polymorphs was about<br />

1.6% (from 0.4651 to 0.4566 cm”/g). The<br />

isothermal Hugoniots of the two<br />

polymorphs were<br />

RDX(1) U,, = 2.68 + 1.9 U,,<br />

and<br />

RDX(I1) U,, = 2.49 + 1.8 U,,,<br />

where the subscript “t” denotes isother-<br />

mal conditions.<br />

Tool Type<br />

12<br />

12I3<br />

Lead Foil Sample<br />

Thickness Size<br />

(mils) (mg)<br />

&I<br />

(cm)<br />

Brass 3 61.1 0.22 50<br />

Rrass 10 61.1 0.55 50<br />

Steel 1 64.0 0.12 50<br />

Steel 10 64.0 0.87 50<br />

22<br />

41<br />

Energy<br />

(J)<br />

Occurrence<br />

of Explosion<br />

(%)

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