Title :
Why high pulsed currents shatter metal wires?
Author :
Lukyanov, A. ; Molokov, S.
Author_Institution :
Sch. of Math. & Inf. Sci., Coventry Univ., UK
Abstract :
If a pulsed current is supplied to a thin metal wire the latter may disintegrate in the solid state. This occurs when the current density is not too high. A review of both theoretical and experimental results on the wire fragmentation due to high pulsed currents is given. It is shown that the main mechanisms of wire disintegration are stress waves induced by thermal expansion of the material owing to Joule heating and thermal shock due to arcs.
Keywords :
buckling; exploding wires; fracture; magnetocaloric effects; pulsed power technology; thermal expansion; thermal stresses; thermoelasticity; Joule heating; air gap; arcs; buckling; current density; current risetime; external circuit; flexural vibrations; fracture surfaces; high pulsed current effects; magneto-thermo-elasticity; one-dimensional model; plastic effects; pulsed current; shattering; stress wave propagation; thermal expansion; thermal shock; thermal stress waves; thin metal wire; wire disintegration mechanism; wire ends; wire fragmentation; Current supplies; Equations; Explosions; Heating; Plastics; Solid state circuits; Surface cracks; Thermal expansion; Thermal stresses; Wire;
Conference_Titel :
Pulsed Power Plasma Science, 2001. PPPS-2001. Digest of Technical Papers
Conference_Location :
Las Vegas, NV, USA
Print_ISBN :
0-7803-7120-8
DOI :
10.1109/PPPS.2001.1001869
