Accession Number : ADP004952

Title :   Dynamic Response in an Elastic-Plastic Projectile Due to Normal Impact,

Corporate Author : ARMY ARMAMENT RESEARCH AND DEVELOPMENT CENTER WATERVLIET NY LARGE CALIBER WEAPON SYSTEMS LAB

Personal Author(s) : Chen,P. C. T. ; Flaherty,J. E. ; Vasilakis,J. D.

Report Date : FEB 1985

Pagination or Media Count : 20

Abstract : A numerical study of the dynamic response of an elastic-plastic projectile due to normal impact has been made using the finite element structural response code ADINA. The projectile is a finite length circular cylindrical bar striking a rigid target. First, three (central-difference, Newmark, Wilson) direct integration schemes were used for uniaxial stress wave problems in a linear-hardening material and the results were compared with an exact analytical solution in order to evaluate accuracy and stability. Then, additional numerical results for perfectly-plastic materials were obtained in order to show the effect of strain-hardening. Finally, some results for a multi-linear material model based on two-dimensional elements are presented order to show the lateral effect. (Author)

Descriptors :   *NUMERICAL ANALYSIS, *DYNAMIC RESPONSE, *PROJECTILES, *IMPACT, ELASTIC PROPERTIES, PLASTIC PROPERTIES, STRAIN HARDENING, FINITE ELEMENT ANALYSIS, EQUATIONS OF MOTION

Distribution Statement : APPROVED FOR PUBLIC RELEASE