Accession Number:

ADA255426

Title:

Strain-Rate Effects in Replica Scale Model Penetration Experiments

Descriptive Note:

Interim rept. Jul 1991-Apr 1992

Corporate Author:

SOUTHWEST RESEARCH INST SAN ANTONIO TX

Report Date:

1992-08-17

Pagination or Media Count:

33.0

Abstract:

A computational study has been performed to quantify the effects of strain rate on replica-model scaled experiments of penetration and perforation. The impact of a tungsten-alloy long-rod projectile into an armor steel target at 1.5 kms was investigated. It was found that over a scale factor of 10, strain-rate effects change the depth of penetration, for semi-infinite targets, and the residual velocity and length of the projectile, for finite- thickness targets, on the order of 5. Although not modeled explicitly in the present study, the time-dependence of damage was examined. Damage accumulation is a strong function of absolute time, not scaled time. At homologous times, a smaller scale will have less accumulated damage than a larger scale therefore, the smaller scale will appear stronger, particularly in situations where the details of damage evolution are important.

Subject Categories:

  • Ammunition and Explosives

Distribution Statement:

APPROVED FOR PUBLIC RELEASE