Accession Number : AD0263798

Title :   A VERSATILE BI-AXIAL TESTING MACHINE FOR INVESTIGATION OF PLASTICITY, CREEP OR RELAXATION OF MATERIALS UNDER VARIABLE LOADING PATHS

Corporate Author : BROWN UNIV PROVIDENCE R I

Personal Author(s) : FINDLEY,W.N. ; GJELSVIK,A.

Report Date : AUG 1961

Pagination or Media Count : 1

Abstract : A machine is described for tests of high sensitivity on tubular specimens subjected to combinations of tension, torsion and internal pressure at room or elevated temperature. Load capacity is 12,000 lb in tension, 3000 in.-lb. in torsion, and 1200 psi internal pressure. Deflections of one in. or more and 150 degrees rotation can be accommodated without cross interference between loading systems. A method of detecting and correcting for eccentric loads was incorporated. Either constant load or constant deflection tests may be performed and a proportional loading device permits applying the load at a constant ratio of tension to torsion followed by excursions from the final loading along another constant ratio of increments of tension and torsion. An electric furnace and controls permit temperatures up to 1950 F. However, the indicated strain measuring sensitivity will probably not be maintained at temperatures much above 600 F. (Author)

Descriptors :   *LABORATORY EQUIPMENT, CREEP, DETERMINATION, HYDROSTATIC PRESSURE, LOAD DISTRIBUTION, MECHANICAL PROPERTIES, MECHANICS, PIPES, PLASTIC PROPERTIES, PLASTICS, RODS, TENSILE PROPERTIES, TEST EQUIPMENT, TORQUE

Distribution Statement : APPROVED FOR PUBLIC RELEASE