Shock compression sensitivity change on command of...

Details Shock compression sensitivity change on command of... Shock compression sensitivity change on command of...

2011-04-19

2011-04-19

McDonough, James E (Department: 1731)

Explosive and thermic compositions or charges

Miscellaneous compositions

C149S002000, C149S017000, C149S108200, C149S108800

Reexamination Certificate

active

07927439

ABSTRACT:
The invention is a method and a composition where, on command, a distributed number of micron size voids are created in an energetic material. The voids are hot spots, which change the shock compression sensitivity of the explosive composition by a factor of 2 to 10. The composition contains SMART materials, which are magnetostrictive materials having a large magnetostrictive coefficient, and in a matter of microseconds following the application of an external electromagnetic field, each of the magnetostrictive nano-structures expands and contracts forming a void, where the sum of the voids increases the shock compression sensitivity of the composition.

REFERENCES:
patent: 6214137 (2001-04-01), Lee et al.
patent: 6669753 (2003-12-01), Chambers et al.
patent: 7088198 (2006-08-01), Simon et al.
Judy Lin-Eftrkhar, Materials on the Move Engineering SMART Materials, http://www.enginerr.ucla.edu/magazine/USsp02.pdf.
Geoffrey P. McKnight,UCLA, Magnetostrictive Materials Background,http://aml.seas.ucla.edu/home.htm.

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