Overview of the Advanced Linear Shaped Charge€¦ · Linear Shaped Charge Megan Tribble, Jerome...
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Sandia National Laboratories is a multimission laboratory managed and operated by National Technology and Engineering Solutions of Sandia, LLC., a wholly owned subsidiary of Honeywell International, Inc., for the U.S. Department of Energy’s National Nuclear Security Administration under contract DE-NA0003525. Overview of the Advanced Linear Shaped Charge Megan Tribble, Jerome Stofleth, Venner Saul, David Peterson, Jeffrey Hannell May 25-26, 2017 | 20 th International Chemical Weapons Demilitarisation Conference SAND2017-5351 C
Transcript of Overview of the Advanced Linear Shaped Charge€¦ · Linear Shaped Charge Megan Tribble, Jerome...
UNCLASSIFIED / Official Use Only / ECI / Patent Caution
Sandia National Laboratories is a multimission laboratory managed and operated by National Technology and Engineering Solutions of Sandia, LLC., a wholly owned subsidiary of Honeywell International, Inc., for the
U.S. Department of Energy’s National Nuclear Security Administration under contract DE-NA0003525.
Overview of the Advanced Linear Shaped Charge
Megan Tribble, Jerome Stofleth, Venner Saul, David Peterson, Jeffrey Hannell
May 25-26, 2017 | 20th International Chemical Weapons Demilitarisation Conference
SAND2017-5351 C
UNCLASSIFIED / Official Use Only / ECI / Patent Caution
Introduction• Explosive Destruction
System (EDS) is used for demilitarization of recovered and stockpile munitions
• Uses explosives to open and distribute contents, which are chemically neutralized
Pristine 105mm Recovered 105mm
UNCLASSIFIED / Official Use Only / ECI / Patent Caution
Introduction
Initial design: Conical (CSC) and linear shaped charges (LSC)
Current design: Linear shaped charges only
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Introduction
CSC LSC
Goal: Design Advanced LSC (ALSC) geometry that better mimics the CSC jet formation process, resulting in better performance → increase hydrodynamic flow
CSC: Long jet stretch, ~3.5-4 km/s
LSC: Short ribbon followed by particulate ejecta, 3-3.5 km/s
UNCLASSIFIED / Official Use Only / ECI / Patent Caution
Hydrocode Modeling
Assuming a planar detonation front, LSC can be discretized for Gurney calculations
Tamping thickness and explosive geometry can be varied to mimic CSC jet formation process
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Hydrocode Modeling
Goal: Increase tip-to-tail velocity gradient to elongate jet length
Reduced unnecessary explosive at side edges
Focused more explosive at apex
Result: More efficient explosive loading (NEW was reduced more than penetration)
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Production
Typical LSC production Fill copper pipe with explosive
Run copper pipe through dies to bend into the usual shape
New technique (NovaTech) Precision machine tamper
Form liner in precision die
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Production
Typical LSC production Fill copper pipe with explosive
Run copper pipe through dies to bend into the usual shape
New technique (NovaTech) Precision machine tamper
Form liner in precision die
UNCLASSIFIED / Official Use Only / ECI / Patent Caution
Loading Hardware and Prototype Charges
• Leak-free
• Vacuum and steam jackets to facilitate heat transfer and minimize cavitation
• Melt-pour 75/25 Octol chosen for manufacturability reasons
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Dynamic Testing Set-Up
RP-1 EBW detonators
Sheet explosive filler on detonator end (rough surface)
A36 and 1018 steel targets
Variable and constant standoff tests
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Dynamic Testing Results
Full arrow 0.050” liner, 2.06 inches
Half arrow
0.050” liner,
2.31 inches
Full arrow 0.062” liner, 2.00 inches
Full arrow
0.040” liner,
1.55 inches
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Dynamic Testing Results(Data Spread vs. Commercial LSC)
0
0.5
1
1.5
2
2.5
0.040" FA 0.050" FA 0.050" HA 0.062" FAALSC version
Penetr
ation (
inches)
Penetration capability of the various tamped ALSC versions
2000 GPF
3200 GPF
1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.90
0.5
1
1.5
2
2.5
Standoff (inches)
Penetr
ation (
inches)
2000 GPF
3200 GPF
0.040" FA
0.050" FA
0.050" HA
0.062" FA
UNCLASSIFIED / Official Use Only / ECI / Patent Caution
Dynamic Testing Results(Scaled Statistical Comparison)
0
0.5
1
1.5
2
2.5
0.040" FA 0.050" FA 0.050" HA 0.062" FAALSC version
Penetr
ation (
inches)
Scaled penetration capability of the various tamped ALSC versions
(All scaled to 2000 GPF, except for 0.050" HA, which was scaled to 3200 GPF)
2000 GPF
3200 GPF
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Conclusions
0.062” and 0.050” liner configurations perform better than off-the-shelf 2000 GPF, 8-14% deeper
0.062” FA and 0.050” FA use their NEW more efficiently than commercial LSC to produce cuts that are about 0.25 inch deeper
ALSC manufacturing process produces consistent and highly symmetric LSC cross-sections compared with conventional production processes
UNCLASSIFIED / Official Use Only / ECI / Patent Caution
Future Efforts
Since these tests were done against monolithic targets, fire these charges against representative munition cross sections
Study optimal standoff against munitions
Optimize production process to minimize voids, impurities, density differences, etc.
