Accession Number : AD0785610

Title :   Vaporization Waves in Impulsively Heated Materials

Corporate Author : ARMY BALLISTIC RESEARCH LAB ABERDEEN PROVING GROUND MD

Personal Author(s) : Burden, Henry S

PDF Url : AD0785610

Report Date : Jan 1972

Pagination or Media Count : 16

Abstract : Computer hydrocodes are essential in determining the magnitude, transmission, and effects of stresses produced when energy is impulsively deposited in a material. As do any solutions of the hydrodynamic equations, these numerical approaches depend upon the form of an auxiliary equation of state for their success. Most hydrocodes give satisfactory treatment in the solid and liquid phases but in codes such as PUFF and RIP the equations of state ignore or improperly treat the liquid-vapor phase change region in which the major expansion of subcritically heated materials takes place. In this paper, a model for this expansion is described which was successful in resolving an anomaly in exploding wire response but is of a type that could not be duplicated by hydrocodes using these equations of state.

Descriptors :   *EXPLODING WIRES, *IMPULSE LOADING, HEAT OF VAPORIZATION, HYDRODYNAMIC CODES, IMPULSE NOISE, METALS, THERMODYNAMICS

Subject Categories : Thermodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE