Experimental measurement of the scaling of the diameter- and thickness-effect curves for ideal, insensitive, and non-ideal explosives

18th APS-SCCM; 24th AIRAPT

Jackson, Scott I.^1 ; Short, Mark^1

Shock and Detonation Physics Group, Los Alamos National Laboratory, Los Alamos

NM

87544, United States^1

关键词: Critical velocities;    Detonation structures;    Detonation velocity;    Diameter effect;    High explosives;    Non-ideal explosives;    Slab thickness;    Thickness effect;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/500/5/052020/pdf
DOI  :  10.1088/1742-6596/500/5/052020

来源: IOP

【 摘 要 】

Numerous two-dimensional high-explosive slab tests were fielded for explosives that exhibit ideal (PBX 9501), slightly non-ideal (PBX 9502), and highly non-ideal (ANFO) detonation. Detonation velocity versus slab thickness t (thickness-effect curves) are compared to previous diameter-effect measurements obtained by varying the diameter d of cylindrical rate sticks. The scale factors d/t necessary to overlay the diameter- and thickness-effect curves were computed for each explosive formulation. We observe that the scale factor varies with detonation velocity (or level of detonation "ideality"). The measured scale factors range from 1.89-2.20, 1.25-1.87, and 1.79-1.05 for PBX 9501, PBX 9502, and ANFO formulations, respectively, as detonation velocity varies from the (near failure) critical velocity to the Chapman-Jouguet velocity. These results support our previous theoretical prediction that the scale factor relating the diameter- and thickness-effect curves will increasingly deviate from two as the detonation structure becomes increasingly non-ideal.