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Back Cover: Hot Spot Formation in Mock Materials in Impact Sensitivity Testing by Drop Hammer (Prop., Explos., Pyrotech. 11/2017)
Author(s) -
Reynolds John G.,
Hsu Peter C.,
Hust Gary A.,
Strout Stephen A.,
Springer H. Keo
Publication year - 2017
Publication title -
propellants, explosives, pyrotechnics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.56
H-Index - 65
eISSN - 1521-4087
pISSN - 0721-3115
DOI - 10.1002/prep.201781104
Subject(s) - sandpaper , hammer , materials science , drop (telecommunication) , composite material , optics , engineering , mechanical engineering , metallurgy , physics
The back cover picture shows an artist depiction of the formation of hot spots in the drop hammer test. In this test, a sample on sandpaper is placed between two hardened anvil surfaces, shown on the right with a sample in between. A heavy weight is dropped on the top anvil, raised higher and higher until a reaction is noted, thought to be instigated by hot spot formation. In this case for sugar, a mock explosive, the formation of hot spots leads to discoloration only, depicted in the top left as bright yellow‐orange spots. The central part of the figure shows the spent sample with sugar‐sandpaper‐hot spots after the drop weight and top anvil have been retracted. Artist: Jacob G. Long. More details are discussed in the article by John G. Reynolds et al. on page 1303 ff.