Investigation of Shear Induced Reaction in Composition B3
Shear-induced reaction (SIR) in explosives was postulated in the 1940s by Bridgman1 and the results of explosive sensitivity tests, such as the drop-weight2,3 and fragment impact tests, provide some evidence for its occurrence. Such tests cannot, however, be used to establish the occurrence of SIR because they are not well instrumented and the explosives are subjected to different combinations of deformations that are not analyzed quantitatively. These limitations prompted Gupta4 to propose the use of the one-dimensional compression and shear wave technique5,6 to study SIR in explosives. In a subsequent study, DeCarli and Gupta7 examined the response of a composite explosive (with 70-wt.% RDX), using stress gages, under combined compression and shear loading. The experimental results were ambiguous and the onset of SIR was not well established. In the present work, we have chosen to examine SIR in Compositon B3 using particle velocity measurements to avoid some of the ambiguities encountered in the previous work.
KeywordsParticle Velocity Energy Release Rate Particle Velocity Peak Flyer Plate Compressional Loading Condition
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