Abstract
Abstract Literature data show that in most gap tests, coarse porous high explosives (HE) seem more shock sensitive than fine whereas in most wedge tests, the reverse is true. It is proposed that gap tests measure threshold for ignition, and that the reversal occurs because the time to ignition is shorter and the time of buildup of chemical reaction is longer for the coarse than the fine material. In other words, for any pair of fine and coarse HE in any specific experiment, there is a pressure (Pγ) at and above which ignition for the fine and coarse is simultaneous. At and above this pressure, the finer material appears more sensitive than the coarse.
Published Version
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