Effects of Impact Velocity and Stress Concentrators in Titanium on Failure by Adiabatic Shearing

Abstract

This Interim Report covers the contract period from Feb. 18/2000 to June 17/2001 (third period of three months). During that period a series of tests on the Modified Double Shear specimens (MDS) of different notch geometry loaded by direct impact has been completed. Impact velocities applied were within the following limits :10 m/s < V < 90 m/s (nominal strain rates 5(*)10(exp 3) 1/s <T < 4.5(*) 10(exp 4) 1/s). The followinggeometry of notches were tested: U-geometry and I-geometry. That is increased stress concentrators were applied. The material tested was Ti-6A1-4V, delivered by the ARL-APG-AMSRL. This series of tests was performed to complete testing at high strain rates with different stress concentrators and to compare results with the standard MDS geometry. Analysis of oscillograms obtained with those tests are almost finished. Before testing the experimental setup for the direct impact loading has been improved. The experimental results show a substantial rate effects for all notch geometry. The failure criteria and the energy to failure are the tasks to be studied in the near future.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Jun 01, 2001
Accession Number
ADA392678

Entities

People

  • J. R. Klepaczko

Tags

DTIC Thesaurus Topics

  • Abstracts
  • Alloys
  • Contractors
  • Contracts
  • Geometry
  • Governments
  • Materials
  • Mechanics
  • Monitoring
  • Security
  • Shear Bands
  • Strain Rate
  • Titanium
  • Titanium Alloys
  • United States
  • Universities

Readers

  • Auditory Neuroscience/Auditory Physiology.
  • Metallurgy
  • Technical Research and Report Writing.