Accession Number : AD0628790

Title :   PRODUCTION AND MEASUREMENT OF A DILATATION LOADING FIELD,

Descriptive Note : Final rept.,

Corporate Author : NEW MEXICO UNIV ALBUQUERQUE BUREAU OF ENGINEERING RESEARCH

Personal Author(s) : Ju,F. D. ; Benham,R. A.

Report Date : NOV 1965

Pagination or Media Count : 109

Abstract : A model of homogeneous, isotropic material was developed in which pure dilatation could be produced and measured. Essentially, the model is a cube of resin epoxy each face of which is pulled by equal tensile force. The equal tensile forces were produced with a hydraulic triaxial tensile testing machine developed for this project. The states of strain were then measured and recorded. An embedded three-dimensional strain gage rosette was used. Dilatation states were produced to within instrumentation error at a hydraulic pressure of 10 psig and carried through to the maximum level of 60 psig which induced an internal strain of approximately 400 mu in/in. The instrumentation error is estimated to have an accumulative maximum of plus or minus 9 percent. There was also an evaluation of the perturbative effects due to the loading device. Included were alignment perturbation causing additional bending moment in the model and excessive friction in the load cylinder causing unequalization of the triaxial loads. (Author)

Descriptors :   (*FRACTURE(MECHANICS), MATERIALS), (*FAILURE(MECHANICS), MATERIALS), EPOXY RESINS, SHEAR STRESSES, TENSILE PROPERTIES, LOADS(FORCES), THERMAL STRESSES, HYDRAULIC CYLINDERS, DEFORMATION, TEST METHODS

Subject Categories : Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE