Towards assessing the violence of reaction during cookoff of confined energetic materials
An analysis of post-ignition events in a variable confinement cookoff test (VCCT) geometry is presented aimed toward predicting the level of violence during cookoff of confined thermally-degraded energetic materials. This study focuses on the dynamic events following thermal initiation whereby accelerated combustion interacts with confinement. Numerical simulations, based on a model of reactive multiphase mixtures, indicate that the response of energetic material is highly dependent upon thermal/mechanical damage states prior to ignition. These damaged states affect the rate of pressurization, dynamic compaction behavior and subsequent growth to detonation. Variations of the specific surface area and porosity produced by decomposition of the energetic material causes different responses ranging from pressure burst to detonation. Calculated stress histories are used in estimating breakup of the VCCT confinement based on Grady-Kipp fragmentation theory.
- Research Organization:
- Sandia National Labs., Albuquerque, NM (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC04-94AL85000
- OSTI ID:
- 408188
- Report Number(s):
- SAND--96-1376C; CONF-961194--2; ON: DE97000886
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
45 MILITARY TECHNOLOGY, WEAPONRY, AND NATIONAL DEFENSE
99 GENERAL AND MISCELLANEOUS
CHEMICAL EXPLOSIVES
COMPUTER CALCULATIONS
COMPUTER CODES
FINITE ELEMENT METHOD
HEAT TRANSFER
IGNITION
MIXING
PRESSURE GRADIENTS
PROPELLANTS
PYROLYSIS
SHOCK WAVES
STRESS ANALYSIS
THERMAL ANALYSIS
THERMAL SHOCK
THERMAL STRESSES