Shock response of pentaerythritol tetranitrate single crystals

Autor:	J. J. Dick, W. J. Spencer, R. N. Mulford, E. Garcia, D. C. Shaw, D. R. Pettit
Rok vydání:	1991
Předmět:	Shock wave chemistry.chemical_compound chemistry Explosive material Shock response spectrum General Physics and Astronomy Mineralogy Pentaerythritol tetranitrate Slip (materials science) Anisotropy Shear flow Crystallographic defect Molecular physics
Zdroj:	Journal of Applied Physics. 70:3572-3587
ISSN:	1089-7550 0021-8979
DOI:	10.1063/1.349253
Popis:	The shock response of single crystals of the explosive pentaerythritol tetranitrate was studied from 3.4 to 19 GPa. Four orientations, 〈110〉, 〈001〉, 〈101〉, and 〈100〉 were studied. The shock Hugoniot and shock initiation sensitivities were measured in wedge tests. Intermediate velocity transitions were noted. A sensitivity anomaly near 4 GPa was discovered for 〈110〉 orientations. Chemiluminescent phenomena associated with this anomaly were studied using framing photography and uv/visible spectroscopy. Both plane‐wave explosive and gas‐gun impact experiments were done. Analysis of the steric hindrance occurring during edge dislocation motion in the shear flow associated with shock‐induced uniaxial strain was done. The results corroborate the hypothesis that the orientation dependence of shock initiation sensitivity is due to the anisotropy of plastic flow, that is, the relative ease of slip in different orientations.
Databáze:	OpenAIRE
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