Experimental Mechanics

, Volume 12, Issue 7, pp 311–316 | Cite as

Use of foil strain gage at high hydrostatic pressure

Investigation shows that, up to 10,000 psi, the calibration of these gages is independent of the hydrostatic pressure
  • Gurnam S. Kular
Article

Abstract

The sources of error inherent in the use of strain gages to measure strain, in various types of pressure or load transducers at high hydrostatic pressure have been pointed out. Two of these errors have generally been over-looked so far. A method to investigate the magnitude of these errors has been described. It is shown that up to 10,000 psi, the calibration of the gages is independent of the hydrostatic pressure.

Keywords

Mechanical Engineer Fluid Dynamics Hydrostatic Pressure Strain Gage High Hydrostatic Pressure 

List of Symbols

es

strain on the substrate to be measured

E

modulus of elasticity of the substrate

ν

Poisson's ratio of the substrate material

p

hydrostatic pressure at which the strainesis to be measured

(eindes,p

strain indicated by the strain gage when the substrate strain ises, and hydrostatic pressure isp

(eind)es,p

strain due to pressure effect at substrate straines, and pressurep

R

resistance of the gage

Kp

gage factor of the gage at pressurep

α

amplification factor of the measuring system

δ, Δ

errors

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Copyright information

© Society for Experimental Mechanics, Inc. 1972

Authors and Affiliations

  • Gurnam S. Kular
    • 1
  1. 1.University of WaterlooWaterlooCan.

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