Novel Technologies for Ultra-High-Rate Deformations of Materials
Abstract
In order to investigate the strain-rate dependence of the mechanical behavior over a wide range of strain rates a small version of the Kolsky Bar, called the Desktop Kolsky Bar, has been developed for testing small samples. The results of the experimental and numerical examinations show that this technique can be utilized for measuring the high-rate behavior at strain rates from approximately 10(+3)s(-1) up to approximately 5 x 10(+4)s(-1). The technique can bridge the capabilities of the conventional Kolsky bar and pressure-shear plate impact techniques, and thus improve our understanding of material behavior at high rates. Our experimental work has all been on the aluminum alloy 6061-T651. While we have been able to obtain both desktop Kolsky bar data at 5x10(4)s(-1) and pressure-shear plate impact data on this material, we have not as yet been able to obtain overlapping data. The lowest strain rate that we have achieved in the pressure-shear experiment is 8x10(4)s(-1), rather than the 5x10(4)s(-1) that needed for direct comparison.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 19, 2002
- Accession Number
- ADA414487
Entities
People
- K. T. Ramesh
Organizations
- Johns Hopkins University