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.

Report Date:

1987-03-01

Pagination or Media Count:

59.0

Abstract:

Preliminary efforts are made to develop a methodology for analyzing the progressive failure of projectiletarget systems under hypervelocity impact. Particular emphasis is placed on the thermalmechanical 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 andor 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 andor 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