Accession Number : AD0411311

Title :   STORED ENERGY OF COMPRESSED METALS FROM SHOCK AND STATIC TESTS,

Corporate Author : HIGH VELOCITY LAB UNIV OF UTAH SALT LAKE CITY

Personal Author(s) : Bailey,Neil P.

Report Date : 25 JAN 1963

Pagination or Media Count : 1

Abstract : The action of metals under extreme shock pres sures is dependent on the form or state of the stored energy in the metals. This need asks for an equation of state for metals which des cribes the stored energy in terms of the pressure and volume of the metal. It is shown that the form of the state equation which describes the internal energy of-4-temperature gases serves equally well for metals as well as for liquids. It is shown that impact tests and static tests yield the same equation of state. Equations are developed for zinc, copper, 24ST aluminum, lead, zirconium, magnesium, and beryllium. By using these state equations, it is shown that it is possible to separate the portion of the shock energy that is possessed kinetically by individual molecules from that stored in force fields between molecules. This makes it possible to evaluate the portion of the shock energy which can soften and change the state of metals. With this infor mation available, a possible approach to the analysis of the cratering by impacting pellets is outlined. (Author)

Descriptors :   (*METALS, DEFORMATION), (*CRATERING, PELLETS), IMPACT SHOCK, EQUATIONS, ZINC, COPPER, ALUMINUM, ALUMINUM, LEAD(METAL), ZIRCONIUM, MAGNESIUM, BERYLLIUM, SHOCK WAVES.

Distribution Statement : APPROVED FOR PUBLIC RELEASE