PIEZORESISTIVE SOIL STRESS GAGES

Abstract

A study was conducted to review the characteristics of available piezoresistive materials and evaluate their suitability as transducers for soil stress gages. The scope was limited to gages for measuring one component of static and dynamic free-field stresses. Three concepts were considered theoretically: (1) piezoresistive strain gage elements mounted on a deflecting diaphragm, (2) solid piezoresistive elements in direct compression and (3) solid piezoresistive beam elements subjected to bending. Gages were designed and fabricated to test each of these concepts. The most satisfactory overall results were obtained with the diaphragm gage. Four such gages were delivered to AFWL in fulfillment of the contract requirements. The compression gage has merit, but there remain many fabrication problems to be overcome. Further effort will be required to develop this concept. A systematic study of the behavior of diaphragm gages in soil is one of the most important activities which needs to be undertaken.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Sep 01, 1966
Accession Number
AD0489311

Entities

People

  • Ernest T. Selig
  • Henry G. Tobin

Organizations

  • IIT Research Institute

Tags

Communities of Interest

  • Advanced Electronics
  • Counter WMD
  • Sensors
  • Weapons Technologies

DTIC Thesaurus Topics

  • Air Force
  • Civil Engineering
  • Compression
  • Contracts
  • Crystal Structure
  • Fabrication
  • Free Field
  • Gages
  • Governments
  • Hydrostatic Pressure
  • Instrumentation
  • Materials
  • Measurement
  • Research Facilities
  • Strain Gages
  • Test And Evaluation
  • Transducers

Readers

  • Explosive Engineering.
  • Structural Dynamics.
  • Systems Analysis and Design