Accession Number : ADA188683

Title :   Sub-Scaling of Projectile/Target System Damaged by Hypervelocity.

Descriptive Note : Final rept. 28 Aug 85-30 Sep 86,

Corporate Author : COMPTEK CORP ALLENTOWN PA

Personal Author(s) : Sih, G C

PDF Url : ADA188683

Report Date : Mar 1987

Pagination or Media Count : 59

Abstract : Preliminary efforts are made to develop a methodology for analyzing the progressive failure of projectile/target systems under hypervelocity impact. Particular emphasis is placed on the thermal/mechanical interaction effects not only for evaluating the change in the local strain rates and material properties but also in finding the temperature and latent heat at which the solid may locally transform into liquid and/or gas. Such a transition can be accurately determined by the inflection points on the time dependent H-function curve that serves as a measure of the order and/or disorder of a physical system. Keywords: Hypervelocity impact, Scale models, Damage, Fracture, Finite element, Strain energy methods, Numerical analysis, Phase transformation.

Descriptors :   *FINITE ELEMENT ANALYSIS, *HYPERVELOCITY IMPACT, *NUMERICAL ANALYSIS, *PROJECTILES, *TARGETS, INTERACTIONS, LATENT HEAT, MECHANICAL PROPERTIES, PHASE TRANSFORMATIONS, PHYSICAL PROPERTIES, SCALE MODELS, STRAIN RATE, THERMAL PROPERTIES

Subject Categories : Ballistics

Distribution Statement : APPROVED FOR PUBLIC RELEASE