A DIAMETER GAGE FOR TRUE STRESS-TRUE STRAIN MEASUREMENTS OF TENSILE SPECIMENS AT REDUCED TEMPERATURES

Abstract

The true stress-strain relationship in specimens undergoing tensile tests is being computed from a continuous record of the axial load and of two perpendicular profile traces of the specimen cross section. The displacement of two sets of opposing fingers, in contact with and constantly traversing the specimen, produces a strain-gage output on an oscillographic record. This record is proportional to the specimen profile. The tensile tests may be conducted at a variety of low temperatures using two cryostats. The first is capable of operation at a number of specific temperatures as low as 77 deg K and will accommodate either round or flat specimens. The second cryostat is capable of operating at temperatures from 4 deg K to 77 deg K with the round specimens only.

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Document Details

Document Type
Technical Report
Publication Date
Feb 01, 1968
Accession Number
AD0669848

Entities

People

  • Ira B. Fiscus
  • James M. Carson

Organizations

  • University of Dayton

Tags

Communities of Interest

  • Sensors

DTIC Thesaurus Topics

  • Air Force
  • Axial Loads
  • Calibration
  • Computer Programs
  • Computers
  • Error Analysis
  • Errors
  • Heat Transfer
  • Low Temperature
  • Materials
  • Materials Laboratories
  • Measurement
  • Strain Gages
  • Stress Concentration
  • Stress Strain Relations
  • Stresses
  • Test Methods

Readers

  • Computer Science/Computer Engineering/Data Science/Digital Signal Processing.
  • Mechanical Engineering/Mechanics of Materials.