Hopkinson Bar Pulse-Shaping with Variable Impedance Projectiles-An Inverse Approach to Projectile Design
Abstract
This report discusses a pulse shaping method for the split Hopkinson pressure bar. The idea is that the profile of an incident pulse can be shaped by using an appropriately tapered projectile. A simple numerical method is described that can determine the projectile shape necessary to yield a desired pulse; it is essentially the inverse of the widely used method that determines the resulting incident pulse due to the impact of a projectile with a known shape. Examples are given where tapered projectiles are used to design tests at constant strain-rates and also to apply a sudden strain-rate "jump" to a specimen during a single test.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 01, 2010
- Accession Number
- AD1207554
Entities
People
- Daniel Casem
Organizations
- United States Army Research Laboratory