Shock initiation sensitivity of damaged TP-H1207C composite propellant

Conference · Sun Jan 01 00:00:00 EST 1989

OSTI ID:7169775

Weirick, L J

A series of impact experiments on a composite and an energetic propellant and their simulants was recently completed using a light-gas gun. Previous experiments were done to obtain Hugoniot data, to investigate the pressure threshold at which a reaction occurs, to measure spall damage at various impact pressures, and to measure the shock attenuation of these materials. Recently, digitizing oscilloscopes with very high speed (1 GHZ/1 ns per point), improved vertical resolution (8 bit), and large storage capacity (62 K points) have been added to our laser interferometer system. These additions have made possible the accurate measurement of the magnitude of impacts with very short loading histories ({approximately}50 ns) which may be followed by long delay times ({approximately}15 {mu}s) before a reaction is initiated or a subsequent impact occurs. Experiments have been performed where a flyer plate on the front of a projectile induced an initial shock of 1.94 GPa through a composite propellant, TP-H1207C, target producing a damaged propellant. After an induced delay of {approximately}4.5 {mu}s, a second impact shock is imposed into the damaged propellant possibly causing it to react. By using secondary impactors of various impedances, the second impact pressure can be lowered until the damaged propellant no longer reacts. This pressure is the initiation threshold pressure for the damaged propellant. For the case of TP-H1207C initially subjected to a 1.94 GPa pressure pulse, the sensitized material initiation threshold was found to be 1.46 GPa. This value contrasts with the previously measured initiation threshold of {approximately}4.1 GPa for undamaged TP-H1207C. 13 refs., 4 figs., 4 tabs.

• Research Organization: Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
• Sponsoring Organization: DOE/DP
• DOE Contract Number: AC04-76DP00789
• OSTI ID: 7169775
• Report Number(s): SAND-89-2580C; CONF-9004147-2; ON: DE90008509
• Resource Relation: Conference: 1990 JANNAF propulsion systems hazards meeting, Laurel, MD (USA), 3-5 Apr 1990
• Country of Publication: United States
• Language: English

Related Subjects

45 MILITARY TECHNOLOGY, WEAPONRY, AND NATIONAL DEFENSE
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
36 MATERIALS SCIENCE
PROPELLANTS
IMPACT SHOCK
ALUMINIUM
CHEMICAL REACTIONS
COMPOSITE MATERIALS
DAMAGE
DETONATIONS
EQUILIBRIUM
FRACTURE MECHANICS
GUNS
INTERFEROMETERS
LASERS
MANUFACTURING
MEASURING METHODS
PERFORMANCE TESTING
PRESSURE EFFECTS
PROBABILITY
PROGRAM MANAGEMENT
RANKINE-HUGONIOT EQUATIONS
REFLECTIVITY
RISK ASSESSMENT
SENSITIVITY
SPALLATION
STABILITY
STRENGTH FUNCTIONS
SURFACE PROPERTIES
VELOCITY
VULNERABILITY
ELEMENTS
EQUATIONS
FUNCTIONS
MANAGEMENT
MATERIALS
MEASURING INSTRUMENTS
MECHANICS
METALS
NUCLEAR REACTIONS
OPTICAL PROPERTIES
PHYSICAL PROPERTIES
TESTING
450100* - Military Technology
Weaponry
& National Defense- Chemical Explosions & Explosives
400800 - Combustion
Pyrolysis
& High-Temperature Chemistry
360603 - Materials- Properties