Notched Bend Behavior of Beryllium over a Wide Range of Strain Rates

Abstract

Three point bend tests on U-notched Charpy specimens were conducted for six grades of beryllium over a range in loading rates from 0.000 001 to 10 m/sec. Load-deflection curves were obtained from tests performed on a servo- controlled hydraulic testing machine at low and intermediate loading rates and with a Hopkinson pressure bar apparatus at high rates. Curves of absorbed energy, maximum load, and maximum deflection against loading velocity indicate a transition velocity for several grades of beryllium at which the ductility of the material decreases sharply.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1975
Accession Number
ADA021116

Entities

People

  • T. Nicholas

Organizations

  • Air Force Research Laboratory

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Air Force
  • Air Force Facilities
  • Chemical Analysis
  • Dynamic Tests
  • Impact Tests
  • Materials
  • Materials Laboratories
  • Mechanical Properties
  • Mechanical Working
  • Stress Concentration
  • Stress Strain Relations
  • Stresses
  • Tensile Strength
  • Tensile Stress
  • Test And Evaluation
  • Transitions
  • Yield Strength

Readers

  • Mechanical Engineering/Mechanics of Materials.