Characterization of Squib, Mk 1 Mod 0: Thermal Stacking from Radar-Like Pulses
Abstract
The electro-thermal equations describing the heating and cooling of wire bridge electroexplosive devices are solved for constant-current radar-type input pulses. The bridgewire temperature-time history is obtained for a variety of pulse amplitudes and repetition frequencies. Equilibrium temperatures are obtained for the varied input conditions and are all combined inA SINGLE NOMOGRAPH. If the hot-spot theory is assumed the conditions for explosion can be deduced. For instance, for the Mk 1 squib, a temperature rise of 500 C will result if the value of I2RW is 1,000 microjoules at a very low pulse repetition frequency (below 60 cps.) or is 100 microjoules at a frequency of 2,000 cps. This temperature rise would be expected to cause the squib to fire approximately 50% of the time.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 01, 1961
- Accession Number
- AD0267876
Entities
People
- J. N. Ayres
- L. D. Hampton
Organizations
- Naval Ordnance Laboratory