General regularities of explosion initiation in determining impact and friction sensitivity of an explosive

The impact and friction sensitivities of explosives were measured by 12 methods used in Russia and abroad. Correlations between explosion frequency on devices No. 1 and No. 2 with a “lower sensitivity limit” according to Russian standard 4545–88 and “critical clamping pressure” for the I-6-2 device are obtained. Almost all results are well correlated with critical stress p1 thus representing a good base for explanation of experimental results for impact and friction. The values we obtained determining friction sensitivity are often proportional to $p_1$. The regularities obtained are explained.