Accession Number:

AD0669848

Title:

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

Descriptive Note:

Technical Report

Corporate Author:

DAYTON UNIV OH DAYTON

Personal Author(s):

Report Date:

1968-02-01

Pagination or Media Count:

31.0

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

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE