METHOD OF ESTIMATING TENSILE PROPERTIES OF MATERIALS TESTED IN INDIRECT TENSION

EQUATIONS WERE DEVELOPED FOR ESTIMATING VALUES OF MODULUS OF ELASTICITY, POISSON'S RATIO, AND TENSILE FAILURE STRAINS FOR CIRCULAR SPECIMENS BASED UPON TOTAL HORIZONTAL AND VERTICAL DEFORMATIONS CREATED IN THE SPECIMEN DURING INDIRECT TENSILE TESTING. A STUDY WAS UNDERTAKEN TO VERIFY THE THEORETICAL RELATIONSHIPS FOR ESTIMATING THE ELASTIC CONSTANTS OF MODULUS OF ELASTICITY, POISSON'S RATIO, AND TENSILE STRAINS. TO SUBSTANTIATE THE EQUATIONS A CIRCULAR ALUMINUM SPECIMEN, WHICH IS CONSIDERED TO EXHIBIT A HIGH DEGREE OF ELASTICITY, WAS TESTED IN INDIRECT TENSION. THE ALUMINUM SPECIMEN WAS INSTRUMENTED WITH ROSETTE STRAIN GAGES AT THE CENTER. THE RESULTS INDICATED THAT THE ELASTIC PROPERTIES CAN BE OBTAINED FROM TOTAL HORIZONTAL AND VERTICAL DEFORMATIONS OF AN ELASTIC MATERIAL TESTED IN INDIRECT TENSION. ADDITIONAL TESTS WERE CONDUCTED TO EVALUATE THE EFFECT OF THE DIMENSIONS OF THE CURVED LOADING STRIP USED IN THE INDIRECT TENSILE TEST AND TO EVALUATE THE EFFECT OF LOADING RATE (VERTICAL STRAIN RATE). IT WAS FOUND THAT THE DIMENSIONS OF THE CURVED LOADING STRIP USED HAD NO SIGNIFICANT EFFECT ON THE TENSILE STRAIN AT THE CENTER OF THE CIRCULAR ALUMINUM SPECIMEN. THE LOADING RATE HAD A SIGNIFICANT EFFECT ON POISSON'S RATIO BUT HAD NO PRACTICAL ENGINEERING EFFECT ON THE MODULUS OF ELASTICITY. /AUTHOR/

• Corporate Authors:

  University of Texas, Austin

  Cockrell Hall
  Austin, TX  United States  78712

  Texas State Department of Highways & Public Transp

  11th and Brazos Streets
  Austin, TX  United States  78701

  Bureau of Public Roads /US

  400 7th Street, SW
  Washington, DC  United States  20590
• Authors:
  • Hadley, W O
  • Hudson, W R
  • Kennedy, T W
• Publication Date: 0

Subject/Index Terms

• TRT Terms: Compliance constant; Deformation; Elasticity (Mechanics); Equations; Estimating; Loads; Modulus of elasticity; Poisson ratio; Strain (Mechanics); Tensile properties; Tension
• Uncontrolled Terms: Loading rate
• Old TRIS Terms: Poissons ratio; Strains
• Subject Areas: Geotechnology; Highways; Materials;

Filing Info

• Accession Number: 00215931
• Record Type: Publication
• Source Agency: Bureau of Public Roads /US
• Files: TRIS, STATEDOT
• Created Date: Sep 28 1970 12:00AM