Physics Geometric Material Model and Experimental Considerations for Exploding Wire Simulation Validation
Abstract not provided.
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Jump to search filtersMeso-scale and continuum simulations for Arrhenius reactive burn model calibration of initiation in hexanitrostilbene (HNS)
Abstract not provided.
Validation and Calibration of Metal Strength Models Using Richtmyer-Meshkov Instability Measurements & Simulations
Abstract not provided.
Shock Hugoniot Relationships for Crystalline and Amorphous HNAB: Insights from Atomistic Simulations and Virtual Diffraction Calculations
Abstract not provided.
Meso-scale and continuum simulations for Arrhenius reactive burn model calibration of initiation in hexanitrostilbene (HNS)
Abstract not provided.
Hydrodynamic Richtmyer-Meshkov Instability of Metallic Solids Used to Assess Material Deformation at High Strain-Rates
Abstract not provided.
Examination of Metal Strength at High Strain Rates Using Richtmyer-Meshkov Instability Experiments at the Advanced Photon Source
Abstract not provided.
Mesoscale Modeling of Explosives at Sandia National Laboratories: Past and Future Directions a GA Tech Graduate Seminar Series Lecture
Abstract not provided.
Characterization of Hypervelocity Fragments and Subsequent HE Initiation
Abstract not provided.
A Selection Rule for Flyer Plate shock sensitivity and margin of Performance
Abstract not provided.
?A selection rule for flyer plates shock sensitivity and margin of performance?
Abstract not provided.
Quantitative Details of Exploding Wires with Application to Single Pore Collapse Validation
Abstract not provided.
Quantitative Details of Exploding Wires with Application to Single Pore Collapse Validation
Abstract not provided.
Mesoscale Modeling of Explosives at Sandia National Laboratories: Past and Future Directions
Abstract not provided.
Mesoscale Modeling of Explosives at Sandia National Laboratories: Past and Future Directions
Abstract not provided.
Characterization of Hypervelocity Fragments and Subsequent HE Initiation
Abstract not provided.
Using Validation-Quality Data of Exploding Wires to Establish Experimental Street-Credibility and Reduce Material Model Error
Abstract not provided.
Development of nano-TATB and comparison of detonation spreading with pressed ultra-fine TATB
Abstract not provided.
Examination of rapid phase change in copper wires to improve material models and understanding of burst
Abstract not provided.
Characterization of hypervelocity metal fragments for explosive initiation
Journal of Applied Physics
The fragment impact response of two plastic-bonded explosive (PBX) formulations was studied using explosively driven aluminum fragments. A generic aluminum-capped detonator generated sub-mm aluminum particles moving at hypersonic velocities. The ability of these fragments to initiate reaction or otherwise damage two PBX materials was assessed using go/no-go experiments at standoff distances of up to 160 mm. Lower density PBX 9407 (RDX-based) was initiable at up to 115 mm, while higher density PBX 9501 (HMX-based) was only initiable at up to 6 mm. Several techniques were used to characterize the size, distribution, and velocity of the particles. Witness plate materials, including copper and polycarbonate, and backlit high speed video were used to characterize the distribution of particles, finding that the aluminum cap did not fragment homogeneously but rather with larger particles in a ring surrounding finer particles. Finally, precise digital holography experiments were conducted to measure the three-dimensional shape and size of the fastest-moving fragments, which ranged between 100 and 700 μm and traveled between 2.2 and 3.2 km/s. Crucially, these experiments showed variability in the fragmentation in terms of the number of fragments at the leading edge of the fragment field, indicating that both single and multiple shock impacts could be imparted to the target material. These types of data are critical for safety experiments and hydrocode simulations to quantify shock-to-detonation transition mechanisms and the associated risk-margins for these materials.
Comparison of detonation spreading in pressed ultra-fine and nano-TATB
Abstract not provided.
Growth to detonation in hexanitrostilbene (HNS)
Abstract not provided.
Coefficient of Thermal Expansion of Titanium Potassium Perchlorate
Abstract not provided.
Characterizing the initiation performance of CL-20 based detonators
Abstract not provided.
Coincidence of the Measured Voltage Peak and the Measured Current Inflection Point in Exploding Metals
Exploding Bridgewire (EBW) Detonators and Exploding Foil Initiators (EFI's, e.g. Slappers) have unique current and voltage characteristics marked by a large voltage spike and an inflection point in the current. Mathematically, it is shown that the voltage peak and the current inflection point must align in time. Models concur with the math and show voltage peaks occurring at the same point in time as the inflection point. Circuit analysis is performed to demonstrate why the voltage peak and current inflection point will almost never align in time for an experiment. To correctly analyze exploding metal behavior, the current inflection point and voltage peak must be manually aligned in time. These conclusions apply to single detonators where current and voltage is measured on those detonators. In multi-detonator systems, the conclusions herein apply only for cases where current and voltage are obtained for each detonator individually. The conclusions will begin to break down as measurements become combined.
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