DYNAMIC COMPRESSION TESTING OF CRUSHER GAGE MATERIAL

Abstract

In order to determine the validity of static calibration of crusher gages, annealed copper crusher gage material has been tested in compression at room temperature at rates of strain from 1.66 x 0.001 in/in/sec to 7.15 x 1000 in/in/sec. A modified Hopkinson bar apparatus as originally used by Kolsky ('An investigation of the Mechanical Properties of Materials at Very High Rates of Loading'. Proc. of the Physical Society, v. 62, pt. II, 1 Nov. 1949) was used to obtain dynamic stress-strain relations for this material. It has been found that this material is weakly strain rate sensitive and static calibration of crusher gages will introduce an insignificant error in the measurement of dynamic peak pressures.

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Document Details

Document Type
Technical Report
Publication Date
Feb 03, 1964
Accession Number
AD0619522

Entities

People

  • James L. Rand

Organizations

  • Naval Ordnance Laboratory

Tags

DTIC Thesaurus Topics

  • Crusher Gages
  • Engineering
  • Gages
  • Guns
  • High Pressure
  • Maryland
  • Materials
  • Measurement
  • Munitions
  • Ordnance Laboratories
  • Projectiles
  • Strain Rate
  • Stress Strain Relations
  • Stress Waves
  • Stresses
  • United States
  • Wave Propagation

Readers

  • Mechanical Engineering/Mechanics of Materials.