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Modified SDM Model for the Calculation of shaped charge hole profiles
Author(s) -
Schwartz Wolfgang
Publication year - 1994
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.19940190408
Subject(s) - impact crater , constant (computer programming) , charge (physics) , jet (fluid) , shaped charge , mechanics , computational physics , feature (linguistics) , geometry , materials science , variable (mathematics) , physics , mathematics , chemistry , mathematical analysis , computer science , particle physics , explosive material , organic chemistry , astronomy , programming language , linguistics , philosophy
Shaped charge craters can be calculated in regards to depth and diameter profile using the SDM model named after Simon, DiPersio, and Merendino( 3 ). Crater profiles calculated using the SDM formulae exhibit a systematic deviation if compared with test data from firings of certain MBB (now DASA) shaped charges into RHA. The calculated craters feature a significantly more trumpet‐shaped profile than the measured holes in RHA This phenomenon is caused, at least partly, by the assumption in the SDM model that the break‐up time and the jet diameter after break‐up are constant. Radiographs of particulated jets provide evidence that the diameter is generally not constant, rather increases from tip to tail. The evaluation of such radiographs also leads to the conclusion of variable break‐up times. Changing those two assumptions a modified set of SDM formulae was developed so that calculated and experimental crater profiles are in better agreement for the above mentioned MBB shaped charges.