Accession Number : AD0646457

Title :   THEORETICAL AND EXPERIMENTAL STUDY OF LOW-VELOCITY PENETRATION PHENOMENA.

Descriptive Note : Final rept. May 64-Aug 66,

Corporate Author : UTAH RESEARCH AND DEVELOPMENT CO INC SALT LAKE CITY

Personal Author(s) : Cannon,Emerson T. ; Paul,Palmer E.

Report Date : AUG 1966

Pagination or Media Count : 152

Abstract : A computer code was developed for solving impact problems. The code uses moving mass points which have all the field variables such as pressure, energy, and stress associated with the points. The fields and their gradients determine the forces on the masses and change as the points move. The code was tested in a one-dimensional problem where it was found to produce correct results. An investigation was carried out on equations of state for materials of interest in armor development. A summary of existing data is given. A simple equation is given for the shock compression of metals and other materials and a computer code is given for calculating adiabatic expansions from a shock-compressed state. A complete report is given on an experimental program to measure material properties. The emphasis in the work is on measuring the energy involved in large-scale deformation of materials. Measurements were made by crushing disks of the test material in testing machines and by ballistic impacts. Measurements were also made on rod-to-rod impacts and on impacts of steel balls on thin plates of the test materials. Ultimate strength of materials was measured by measuring maximum acceleration of a free surface in rod-to-rod impact. (Author)

Descriptors :   (*ARMOR, SHOCK RESISTANCE), PENETRATION, COMPUTER PROGRAMS, VELOCITY, THEORY, PRESSURE, STRESSES, ENERGY, TERMINAL BALLISTICS, METALS, MATERIALS, IMPACT

Subject Categories : Ballistics

Distribution Statement : APPROVED FOR PUBLIC RELEASE