DISSIPATION OF EXPLOSIVE ENERGY BY SOLID CELLULAR MATERIALS: EXPERIMENTAL EVALUATION

R. D. Kapustin1, L. B. Pervukhin.1, P. A. Nikolaenko1,

A. D. Chudnovskii2, and A. G. Kazantsev2

1 Institute of Structural Macrokinetics and Materials Science, Chernogolovka, Moscow, 142432 Russia

2 Central Research Institute for Machinery Industry (TsNIITMash),

Moscow, Russia

As is known, from the published data, gas-liquid foams most effectively use for effective dissipation of shock energy. But gas-liquid foams exhibit a restricted service life. In this work, we explored the applicability of solid refractory foams for the above purpose.

Purpose of the work - to determine the effectiveness of the dissipation of explosive energy by solid porous materials (solid foams).

In the represented work is investigated the possibility of application for the dissipation of the shock waves of the solid aluminosilicate porous materials VBF of the production company Privately held company NPKF “MaVR”.

10 ммА Б

HEAT-RESISTANT PARTICULAR LIGHT CELLULAR MATERIAL – OF THE MARK WCF

Main characteristics:

The mark of a material WCF-650

Strength limit on сompression porosity, МPа

4

Heat conductivity at temperature of 20°C W/mxk

0,2

application temperature 1550°С

EXPERIMENTAL MODEL

1 – Cellular material WCF;

2 – the strain gauge;

3 – explosive charge (TNT);

4 – the electric detonator;

5 – camera for the electric detonator and opening for wires or detonation cord;

6 – metall shell of the experimental model;

Strains in metall shell of experimental models, МПа

TNT mass

,gramm

Model without solid aluminosilicate porous

material WCF

Model with solid aluminosilicate porous

material WCF

the upper surface The side

the upper surface The side

200 72,2 88 31,8 42,6

400 244 304,7 24 31,8

600 352,3 397,2 137,8 194,1

900     341,9 423,4

THE CALCULATIONOF THE EFFICIENCY OF SHOCK ENERGY DISSIPATION

QV = 1,4/0,14 = 10 MJ/m3 = 10 J/sm3 QV – volumetric energy-absorption of material WCF; QП – the quantity of energy, absorbed by material WCF

according to the results of the tests of experimental models;

V – the volume of material WCF in the experimental models

V

QQ ПV

CONCLUSIONS

1) Is developed the procedure of the experimental determination of the energy-dissipate ability of the solid cellular materials by the method of their accomodation into closed metal shell from a change in the deformation of this of shell.

2) The foamy materials under investigation showed good results: the efficiency of shock energy dissipation was found to attain a value of about 10 J/cm3. Material WSF with the volume of 1 m3 absorbs the energy, isolated with explosion of the charge of TNT by the mass of 2,4 kg.

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