Accession Number : ADA117392

Title :   A More Rational Approach to the Stress Analysis of Projectiles.

Descriptive Note : Conference paper,

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

Personal Author(s) : Chu,Shih C ; Steiner,James

PDF Url : ADA117392

Report Date : 18 Jun 1982

Pagination or Media Count : 13

Abstract : Projectiles are traditionally analyzed and designed by using theory of elasticity. In this approach, the entire projectile body is considered to be loaded within the elastic region. However, under actual firing conditions, the equivalent stress in some region of the projectile is much greater than the yield strength of the projectile material. Hence, plastic flow will be encountered in the projectile body. The present trend in stress analysis of weapon and ammunition components is to take into account, in a more rigorous fashion, the complex phenomena of plastic flow. This is due too the necessity of designing for maximum stress to achieve an optimal design. In this investigation, a more rigorous nonlinear technique is developed in order to predict the inelastic deformation and stress distributions of a projectile subjected to actual firing conditions. Both nonlinear material response and geometric nonlinearity have been taken into consideration. Nonlinearity of material properties has been taken into account by use of theories of plasticity. Geometric nonlinearity has been considered by use of the finite element approach. A complete inelastic stress analysis of a 30 mm XM TP projectile has been conducted. The intent of this investigation is to identify potential design flaws and critical regions of the projectile under actual firing environment.

Descriptors :   *Finite element analysis, *Statistical analysis, *Stress analysis, *Projectiles, Elastic properties, Defects(Materials), Yield strength, Plastic flow, Axisymmetric, Stress strain relations, Modulus of elasticity, Thermal properties, Hardening, Density, Matrices(Mathematics), Poisson ratio, Nonlinear analysis, Mechanical properties, Aluminum, Metals, Steel, Experimental design, Firing tests(Ordnance)

Subject Categories : Metallurgy and Metallography
      Statistics and Probability
      Ammunition and Explosives
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE