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Upgraded Analytical Model of the Cylinder Test

Journal Article · · Propellants, Explosives, Pyrotechnics
 [1];  [1];  [1];  [1];  [1]
  1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States). Energetic Materials Center
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A Gurney-type equation was previously corrected for wall thinning and angle of tilt, and now we have added shock wave attenuation in the copper wall and air gap energy loss. Extensive calculations were undertaken to calibrate the two new energy loss mechanisms across all explosives. The corrected Gurney equation is recommended for cylinder use over the original 1943 form. The effect of these corrections is to add more energy to the adiabat values from a relative volume of 2 to 7, with low energy explosives having the largest correction. The data was pushed up to a relative volume of about 15 and the JWL parameter ω was obtained directly. Finally, the total detonation energy density was locked to the v = 7 adiabat energy density, so that the Cylinder test gives all necessary values needed to make a JWL.
Research Organization:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
AC52-07NA27344
OSTI ID:
1226948
Report Number(s):
LLNL-JRNL--600314
Journal Information:
Propellants, Explosives, Pyrotechnics, Journal Name: Propellants, Explosives, Pyrotechnics Journal Issue: 3 Vol. 38; ISSN 0721-3115
Publisher:
Wiley
Country of Publication:
United States
Language:
English

References (7)

Comparison of Cylinder Data and Code Calculations for Homogeneous Explosives: Comparison of Cylinder Data and Code Calculations… journal August 1993
A Constant-Density Gurney Approach to the Cylinder Test journal April 2004
Phenomenological model of shock initiation in heterogeneous explosives journal January 1980
Velocimetry of fast surfaces using Fabry–Perot interferometry journal January 1988
The Effects of Containment on Detonation Velocity journal February 2004
A constitutive model for metals applicable at high‐strain rate journal March 1980
Compact system for high-speed velocimetry using heterodyne techniques journal August 2006

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Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
Cyclex
Cylinder test
Detonation energy
Gurney equation
JWL