Diameter effect curve and detonation front curvature measurements for ANFO

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Diameter effect and front curvature measurements are reported for rate stick experiments on commercially available prilled ANFO (ammonium-nitrate/fuel-oil) at ambient temperature. The shots were fired in paper tubes so as to provide minimal confinement. Diameters ranged from 77 mm ({approx} failure diameter) to 205 mm, with the tube length being ten diameters in all cases. Each detonation wave shape was fit with an analytic form, from which the local normal velocity Dn, and local total curvature {kappa}, were generated as a function of radius R, then plotted parametrically to generate a Dn({kappa}) function. The observed behavior deviates substantially from that ... continued below

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5 p.

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Catanach, R. A. (Richard A.) & Hill, L. G. (Larry G.) January 1, 2001.

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Description

Diameter effect and front curvature measurements are reported for rate stick experiments on commercially available prilled ANFO (ammonium-nitrate/fuel-oil) at ambient temperature. The shots were fired in paper tubes so as to provide minimal confinement. Diameters ranged from 77 mm ({approx} failure diameter) to 205 mm, with the tube length being ten diameters in all cases. Each detonation wave shape was fit with an analytic form, from which the local normal velocity Dn, and local total curvature {kappa}, were generated as a function of radius R, then plotted parametrically to generate a Dn({kappa}) function. The observed behavior deviates substantially from that of previous explosives, for which curves for different diameters overlay well for small {kappa} but diverge for large {kappa}, and for which {kappa} increases monotonically with R. For ANFO, we find that Dn({kappa}) curves for individual sticks (1) show little or no overlap--with smaller sticks lying to the right of larger ones, (2) exhibit a large velocity deficit with little {kappa} variation, and (3) reach a peak {kappa} at an intermediate R.

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5 p.

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  • Submitted to: American Physical Society (APS) Topical Conference on Shock Compression of Condensed Matter, Atlanta, Georgia, June 24-29, 2001

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  • Report No.: LA-UR-01-3261
  • Grant Number: none
  • Office of Scientific & Technical Information Report Number: 975547
  • Archival Resource Key: ark:/67531/metadc925945

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Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • January 1, 2001

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  • Nov. 13, 2016, 7:26 p.m.

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  • Dec. 12, 2016, 3:38 p.m.

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Catanach, R. A. (Richard A.) & Hill, L. G. (Larry G.). Diameter effect curve and detonation front curvature measurements for ANFO, article, January 1, 2001; United States. (digital.library.unt.edu/ark:/67531/metadc925945/: accessed October 18, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.