Susan test

Detonation (and Explosion), Energy (Relative) Release During Susan Tests for Ignition of Explosives by Impact. Tables 2, 3 4, pp... 

G.D. Dorough et al, "The Susan Test for Evaluating the Impact Safety of Explosive Materials , LRLR UCRL 7394(1965)... 

For comparison with Susan Test, Fig 25 shows variations of an "anvil-driver impact test first described by Napadensky et al (See ref 42a). As conducted by Green Dorough, the driver plate was a mild steel plpte, 8-inch diameter 1-inch thick and the target (anvil) a 10-inch square plate, of. mild... 

Type 1-Type 2 tests. Whereas the Susan Test is a quick and reliable way of obtaining a comparative assessment of an explosive s behavior under impact, the Type 1-Type 2 experiments provide a way of elaborating on that behavior but at the cost of a considerably larger number of experiments than that required for the Susan Test... 

Ref 55b) and for the "Susan Test" (Refs 55a, 61 67). It was of interest to determine if the above threshold can be lowered by applying shocks of longer duration and more nearly plane as used in the NOL modified gap test. In this test the pressure falls rapidly because of the action of strong rarefaction waves and in addition, the shock entering the explosive is quite curved. An experimental arrangement which gives a more... 

Detonation, Susan Test in. See Refs 61 8c 67, under DETONATION (AND EXPLOSION), EXPERIMENTAL PROCEDURES... 

Initiation by Projectile Impact is a complicated process which depends on a combination of shock initiation, impact initiation and hot fragment initiation effects. For fast projectile impact, shock initiation effects are predominant. With slow projectiles the initiation resembles Impact Initiation. Further complications are introduced if the impacting projectiles are hot a special case where the explosive is part of the projectile is the so-called Susan Test—see Barrier Tests Their Comparison with Shooting Tests in Vo 4, pp D145-147 and Detonation (and Explosion) Experimental Procedures in Vol 4, pp 333-335... 

Energy (Relative) Release During Susan Test fof Ignition of Explosives by Impact. 

Susan test Threshhold velocity approx 160ft/ sec has very small probability of buildup to violent reaction (Ref 2)... 

Detonation (and expln) energy (relative) release during Susan test (ignition of expls by impact) 4D267... 

G.D.Dorough in Naval Weapons Lab Rept 1805 (April 1962) (Conf) describes the Susan Test... 

The object of the Susan Test is to compare the relative sensitivity of propints and expls under conditions of impact. It is performed by impacting a confined specimen at high velocities onto a steel plate. The driver is a 3-inch gun which imparts velocities ranging from 30 to 40m/s to the projectile. The results in terms of the kinetic energy of the projectile required for initiation are only of empirical value for reasons stated above (Ref 18, pp 2—20)... 

TNT shows no undesirable properties by the Susan test (Fig 2). Minor ignitions are seen down to about 235ft/sec (72m/s) impact velocity but only after extensive splitting of the projectile nosecap and abrupt halt of the projectile at the... 

Fig2 Susan Test TNT. Conversion factor i ft/sec = 3.048 x iCPm/s... 

Comp B-3 (RDX/TNT 60/40) behaves reasonably well in the standard Susan test (Fig 4). 

Susan, test (Fig 5). The threshold velocity for reaction is probably about 180ft/sec (55m/s), which is rather typical of the TNT-bonded cast... 

Ref A.M. Weston L.G. Green, Data Analysis of the Reaction Behavior of Explosive Materials Subjected to Susan Test Impacts , UCRL-13480, Lawrence Livermore Lab, Univ of Calif (1970)... 

Susan Test, at over 1. Okm/sec impact velocity No significant energy release 42,46, 57... 

The theory and practice of impact sensitivity testing are discussed in detail in Vol 7,135-R ff (see also Vol 4, D392). Several types of equipment have been used on an empirical basis, and the results have often been difficult to reproduce. The qualitative conclusion can be drawn, however, that TNT is less sensitive to impact than all other common expls except Explosive D (ammonium picrate), and TATB. A similar conclusion can be drawn from data from other types of tests, such as the Susan Test, and from a comparison of critical initiation energies (Ref 141)... 

For impact sensitivity of confined explosive charges thrown against a steel target -> Susan Test. 

Also propellant charges for rockets and guns have also been developed by compounding solid explosives such as nitramines (e.g. -> Cy-clonite) with plastics. Plastic explosives and plastic propellants are of interest, if low thermal and impact sensitivity is needed (- LOVA -> Armor Plate Impact Test -> Friction Sensitivity -> Heat Sensitivity - Impact Sensitivity -> Projectile Impact Sensitifity - Susan Test). 

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