THE EFFECTS OF HIGH PRESSURE ON FOIL STRAIN GAGES ON CONVEX AND CONCAVE SURFACES.

Abstract

The investigation was made to determine whether a linear pressure-strain response could be obtained for gages mounted on convex and concave specimens subjected to hydrostatic pressures to 140 ksi. Linear pressure-strain curves were obtained for five different types of foil strain gage having gage lengths varying from 1/16 to 1/4 in. These were mounted on steel, aluminum and magnesium specimens having diameters ranging 1/4 in. convex to 3/8 in. concave. The inverse slope of the pressure-strain curves was compared with the compressibility constant to determine a percent deviation. The percent deviation was found to be essentially independent of gage length for the range of specimen configurations investigated except where the radius of curvature of the specimen induces problems in mounting the gages. Since a linear pressure-strain response was obtained, it is possible to correct the strain readings for gages mounted on specimens of varied hydrostatic compressibility and geometrical configuration.

Document Details

Document Type
Technical Report
Publication Date
Mar 01, 1965
Accession Number
AD0615030

Entities

People

  • R. Vincent Milligan

Tags

DTIC Thesaurus Topics

  • Aluminum
  • Compressive Properties
  • Curvature
  • Diameters
  • Gages
  • Geometric Forms
  • Geometry
  • High Pressure
  • Hydrostatic Pressure
  • Lines (Geometry)
  • Magnesium
  • Strain Gages

Readers

  • Critical Infrastructure Protection in CBRN and WMD Threats.
  • Mechanical Engineering/Mechanics of Materials.