Strain-Rate Effects in Replica Scale Model Penetration Experiments
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 km/s 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.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 17, 1992
- Accession Number
- ADA255426
Entities
People
- Charles E. Anderson Jr.
- Chris J. Kuhlman
- Scott A. Mullin
Organizations
- Southwest Research Institute