Wenograd test

The writer (Ref 8a) detd explosion times of Petrin rapidly heated in small stainless steel tubes (Wenograd test). The measurement scatter was too large to obtain reliable kinetic data. 

It was possible, however, to establish an approx minimum explosion temp of about 280° under these test conditions. For comparison, the Wenograd test results gave minimum explosion temps of about 420° and about 280° for TNT and NG respectively... 

Some insight into what are the best parameters, and how valid they are at higher temps, may be gained by examining the results of the so-called Wenograd test. In this test liq or molten expl is loaded into a hypodermic needle which is then heated rapidly to a controlled... 

Arrhenius Parameters Based on the Wenograd Test (0.018cm inner diameter tubes)... 

Wenograd Test. See in Vol 7, K12-L -R under Kinetics in Explosion Phenomena ... 

At one time it was believed (Ref 3) that detonability was detd by the burning rate. It must be understood clearly that high order detonation is a bulk phenomenon and not one governed by the classic proplnt burning theories. The tendency to detonate is a characteristic intrinsic with each formulation which must be studied in shock environments as it is found in a card gap or flyer plate test (see later in this article) or Susan and Wenograd tests (Ref 19) Likewise, density is not a useful measure of the detonability of a proplnt except perhaps to the extent that low density formulations may be porous. A more valid measure of the safe-life of proplnts is the depletion with time of stabilizers such as the nitroamines which are found in double base proplnts or the loss of the plasticizer. Such determinations can now be performed routinely in a quantitative fashion by means of liq chromatography Nuclear Radiation Hazard... 

In the Wenograd test a iiq expl is introduced into stainless steel hypodermic tubing which is then heated by a condenser discharge. The change in electrical resistance of the tubing is a measure of T and a further change in resistance upon expln is a measure of te... 

Wenograd, A Photographic Study of The Impact Test , ERDE Rept No 6/12/60, AD 241207... 

This effect is seen quite dramatically in data obtained by both Moulard and Wenograd (Ref. 9). In both sets of tests reported, very long shock pulses were used (the flyers were actually cylinders). Therefore, the data are shown only for pressure, not energy fluence. Each data point represents the 50% pressure for detonation versus nondetonation for different diameter flyers. The explosive targets were Composition B, and the flyers were steel. These results are shown plotted in Figure 22.8. 

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