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Stress analyses of perforated flat plates under in-plate loadings

Description: Strain-gaged flat plates having one, two, three, and five closely spaced holes were tested under uniaxial and 1:1 biaxial loading conditions. The experimental results of these tests were compared with corresponding calculated values obtained using the computer program TABLES, which was developed at Battelle-Columbus Laboratories. The study was conducted (1) to obtain highly reliable experimental data that can be used in the design of penetrations in vessels having large radii of curvature, (2) … more
Date: June 28, 1976
Creator: Callahan, J. P. & Bryson, J. W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Studies of encapsulation materials for terrestrial photovoltaic arrays. Third quarterly progress report, March 16, 1976--June 15, 1976

Description: Most of this report is concerned with Study 4, ''Development of Accelerated and Abbreviated Testing Methods for Predicting Performance of Encapsulation Materials Over a 20-Year Lifetime.'' The outputs of the study are to be (1) the specification of a methodology for developing the experimental designs for aging tests, and (2) the development of the experimental designs for aging tests for selected materials and material interfaces. Pursuant to these goals, the aging behavior of polymeric materi… more
Date: June 28, 1976
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Synthetic-pitch binders by autoclave polymerization of organics

Description: Polymers prepared by autoclave heat treatment of simple hydrocarbons were evaluated as sources of synthetic pitches for use in fabricating composite carbons. Hydrocarbons included: indene, phenanthrene, triphenylbenzene, 1,4-diphenyl-1,3-butadiyne, and cinnamylideneindene. Autoclave temperatures and pressures were in the ranges of 340 to 515/sup 0/C and 5 to 28 MPa, respectively. The more promising pitch materials were liquids or low-melting solids with coke yields of approximately 50 weight pe… more
Date: June 28, 1976
Creator: Smith, W. E. & Napier, B. Jr.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Apparatus for spot welding sheathed thermocouples to the inside of small-diameter tubes at precise locations

Description: Equipment and procedures used to spot weld tantalum- or stainless-steel-sheathed thermocouples to the inside diameter of Zircaloy tubing to meet the requirements of the Multirod Burst Test (MRBT) Program at ORNL are described. Spot welding and oxide cleaning tools were fabricated to remove the oxide coating on the Zircaloy tubing at local areas and spot weld four thermocouples separated circumferentially by 90/sup 0/ at any axial distribution desired. It was found necessary to apply a nickel co… more
Date: June 28, 1976
Creator: Baucum, W. E. & Dial, R. E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Neutral currents and parity breakdown in atomic transitions: three proposed experiments

Description: This paper describes three proposed experiments for observing the breakdown of parity in atomic transitions due to the exchange of neutral, parity-violating currents arising from some of the new gauge models (e.g., the Weinberg model) for the weak interaction. The experiments are based on exploiting a suggestion, by Bouchiat and Bouchiat, that modern laser technology be utilized to produce intense, monochromatic, and polarized photon beams with which to excite forbidden atomic transitions of th… more
Date: June 28, 1976
Creator: Bloom, S. D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Dip coating process. Quarterly report No. 3, March 19, 1976--June 18, 1976

Description: The objective of this research program is to investigate the technical and economic feasibility of producing solar-cell quality sheet silicon by dip-coating one surface of carbonized ceramic substrates with a thin layer of large-grain polycrystalline silicon. Of the various substrate materials dip-coated this reporting period, mullite appears, at this time, to best satisfy the requirements of this research program. Dip-coating experiments continue to demonstrate that layer thickness and grain s… more
Date: June 28, 1976
Creator: Heaps, J. D.; Maciolek, R. B.; Scott, M. W.; Wolner, H. A. & Nelson, L. D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Dynamics of the reaction of the N/sup +/ ion with hydrogen isotopes and helium

Description: Molecular beam techniques were used to study the reactive and non-reactive scattering of the nitrogen positive ion from hydrogen isotopes and helium, at energies above the stability limit for spectator stripping. Reactive scattering was observed from H/sub 2/ and HD targets. Non-reactive scattering was observed from H/sub 2/ and D/sub 2/ targets, and from He at one energy. A correlation diagram for the system is presented and compared with the available a priori calculations. Two surfaces are e… more
Date: June 28, 1976
Creator: Ruska, W. E. W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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