Abstract
The stability of strong shock waves in metals with respect to
spontaneous emission of acoustic and entropy-vortex waves is
investigated theoretically. The analysis employs the empirical Hugoniot
adiabatic (HA) which is commonly represented as a straight line in the
plane (U,D) where U is the particle velocity behind the shock and D is
the shock velocity. The criterion for spontaneous emission depends on
the sound velocity in a shock-compressed medium which is determined from
the three-term equation of state. The latter takes into account
contributions of atoms and electrons to the total pressure. The atomic
Gruneisen parameter and the cold elastic pressure are calculated from a
system of coupled differential equations which is based on the empirical
HA and the Slater-Landau approach. It has been found that spontaneous
emission may occur in metals with relatively low values of the Hugoniot
adiabatic slope S=dD/dU such as molybdenum and tantalum.
Original language | English GB |
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Pages (from-to) | 207-210 |
Journal | AIP Conference Proceedings |
Volume | 429 |
DOIs | |
State | Published - 1 Jul 1998 |
Externally published | Yes |
Keywords
- High-pressure and shock wave effects in solids and liquids
- Acoustical properties of solids