Accession Number : ADP000025

Title :   Nonlinear Analysis of In-Bore Projectiles,

Corporate Author : ARMY ARMAMENT RESEARCH AND DEVELOPMENT COMMAND DOVER NJ FIRE CONTROL AND SMALL CALIBER WEAPON SYSTEMS LAB

Personal Author(s) : Chu,Shih C.

Report Date : SEP 1982

Pagination or Media Count : 14

Abstract : In contrast to the traditional designing and analyzing techniques (theories of elasticity), the plastic flow in the projectile has been taken into account. On the basis of Drucker's flow rule of plasticity, the Von Mises flow criterion, and the strain-hardening and compressibility properties of a material, a nonlinear elastoplastic method has been developed for analyzing a projectile subjected to actual complicated firing conditions. Geometric nonlinearity has been considered by using the finite element technique. An incremental loading procedure has been used to consider the actual firing environment of a gun. The complete loading history which includes propellant gas pressure, rotating band pressure, setback force, and spin rate of a projectile was defined as a function of time. (Author)

Descriptors :   *Steel, *Projectiles, *Plastic flow, *Stress analysis, *Finite element analysis, Nonlinear analysis, Bores, Armor piercing ammunition, Stress strain relations, Yield strength, Poisson ratio, Modulus of elasticity, Plastic deformation, Interior ballistics, Computations, Equations, Matrices(Mathematics)

Distribution Statement : APPROVED FOR PUBLIC RELEASE