Electrothermal response testing more than a quality assurance tool

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

OSTI ID:5480408

Munger, A C

A simple engineering model of hot wire'' behavior has been constructed based on the electrothermal parameters that can be obtained by the application of that nondestructive test technique. The model uses the data taken before the pyrotechnic charge is loaded on the wire as background data. The data is taken as a loaded component is modified by the before loading data. The ETR data is combined with the auto-ignition temperature for the pyrotechnic and the restive heating capacity for the bridgewire to predict an approximate ignition time for the device. A modification of the procedure can be used to predict the no-fire level of the device. A reasonable estimate of the spread in ignition threshold currents at constant current can be obtained by applying the data spread in the ETR gamma values to the no-fire estimate. One of the major benefits of the model is that the temperature of the pyrotechnic mix and the bridgewire can be calculated and presented graphically. This visualization brings together many of the known facts about the electrically ignited system. The relationship between hot and cold firings, high and low current inputs, and the thermal properties of the ignition interface are easily seen.

• Research Organization: EG and G Mound Applied Technologies, Miamisburg, OH (USA)
• Sponsoring Organization: DOE/DP
• DOE Contract Number: AC04-88DP43495
• OSTI ID: 5480408
• Report Number(s): MLM-3607(OP); CONF-8909113-5; ON: DE90001449
• Resource Relation: Conference: 14. international pyrotechnics seminar, Jersey (UK), 18-22 Sep 1989
• Country of Publication: United States
• Language: English

Related Subjects

45 MILITARY TECHNOLOGY, WEAPONRY, AND NATIONAL DEFENSE
99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE
IGNITION SYSTEMS
MATHEMATICAL MODELS
DETONATORS
HEAT SINKS
NONDESTRUCTIVE TESTING
QUALITY ASSURANCE
TEMPERATURE EFFECTS
WIRES
MATERIALS TESTING
SINKS
TESTING
450100* - Military Technology
Weaponry
& National Defense- Chemical Explosions & Explosives
990230 - Mathematics & Mathematical Models- (1987-1989)