Accession Number : AD0669848

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

Corporate Author : DAYTON UNIV OHIO RESEARCH INST

Personal Author(s) : Fiscus,Ira B. ; Carson,James M.

Report Date : FEB 1968

Pagination or Media Count : 30

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 77K and will accommodate either round or flat specimens. The second cryostat is capable of operating at temperatures from 4K to 77K with the round specimens only. (Author)

Descriptors :   (*METALS, NONDESTRUCTIVE TESTING), STRESSES, STRAIN(MECHANICS), STRAIN GAGES, PLASTIC PROPERTIES, MEASUREMENT, LOADS(FORCES), TENSILE PROPERTIES, RECORDING SYSTEMS, DEFORMATION, TEST EQUIPMENT, TEST METHODS, OPERATION, DATA PROCESSING, COPPER, ANALYSIS OF VARIANCE

Subject Categories : Metallurgy and Metallography
      Test Facilities, Equipment and Methods
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE