A COMPLETE E, P, V, T, S THERMODYNAMIC DESCRIPTION OF METALS BASED ON THE P,U MIRROR-IMAGE CONCEPT
Abstract
The well-known practice of using the mirror image, in the P,u plane, of the shock Hugoniot curve about a vertical line through the shocked state PH, uH is shown to give a complete thermodynamic description of metals when the U(shock velocity) vs. uH relationship and V-1( V/ T)P 0 are known. Use of the experimental relationship U = co + auH (a and co constants) and = constant, leads to a thermodynamic description which results in the metal appearing less compressible than if described by the Mie-Gruneisen equation of state. Furthermore, the existence of an anomalous behavior of cp in the low pressure neighborhood of the initial state rules out the simultaneous existence of a Hugoniot satisfying the linear U vs. uH relationship, of isentropes satisfying the mirror image assumption, and of a constant value of in this neighborhood. Thermodynamic functions for 16 metals are calculated up to 2 megabars and compared with the results obtained from the Mie-Gruneisen equation of state.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 13, 1962
- Accession Number
- AD0290779
Entities
People
- Julius W. Enig
Organizations
- Naval Ordnance Laboratory