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Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
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Differential corrections applied to Vinti accurate reference satellite orbit with inclusion of third zonal harmonic
Differential method of orbit improvement for Vinti spheroidal theory of artificial satellite motion about oblate planets with inclusion of planetary gravitational effects
Stress field generation by screw dislocation pile- up at hard circular cylindrical inclusions obtained, using approximation of continuously distributed dislocations
Baddeleyite inclusion in Marthas Vineyard tektite identified by electron microscopy
Chemical analyses of stony meteorite and iron meteorite with silicate inclusions
Elastoplastic analysis of circular cylindrical inclusion in uniformly stressed infinite homogeneous matrices of composite materials for aerospace applications
Argon and potassium in silicate inclusions of iron meteorites analyzed, determining radioactive age
Mafic and ultramafic inclusions as clues to depth of origin of basaltic magmas in earth mantle, noting estimation of geothermal gradients
Electron microprobe study of inclusions in lead telluride thermoelectric elements
Silicate inclusions in iron meteorites analyzed by microprobe and classified according to phase assemblages, compositions and textures
Lunar petrology of silicate melt inclusions from Apollo 11 rock samples, discussing heating experiments
Neutron activation determined concentrations of Ni, Ga, Ge and Ir in iron meteorites with silicate inclusions
Aerodynamic drag inclusion in Vinti satellite theory and application to heavy air drag satellite San Marco 2 with increased computed orbit accuracy
Stress-strain diagram for nonhomogeneous composite with circular inclusion using Hookes law
Large elastic deformations of incompressible materials shells with inclusion of transverse normal strain, considering thickness change at boundaries
Apollo 12 lunar soil particles observation for reduced metal meteoritic inclusions, suggesting shock impact effects during meteoritic bombardment of moon
Measurements have been conducted of the amounts and isotopic composition of Xe and Kr in silicate inclusions of several iron meteorites. It is shown that the Xe and Kr contents are comparable to chondritic values. The isotopic compositions show trapped gas of both chondritic and atmospheric composition. Large spallation effects occur in some of the meteorites; the spallation spectra in some instances differ from those reported for stone meteorites. In several meteorites, very large neutron capture effects on Br and I occur. All samples have pronounced Xe129 excesses which apparently indicate differences in the formation times from chondrites of less than about 100 million years; however, the presence of trapped Xe132 in silicates which were enclosed in molten Fe-Ni and cooled slowly proves that they were not entirely outgassed, so that some of the Xe129 excess may also be trapped.
Nonlinear boundary value problems of an infinite elastic-plastic plate with a circular hole subjected to pure tension and pure shear at infinity are solved by a method involving Fourier series and finite difference. On the basis of these solutions, the validity of Neuber's relationship between the stress and strain concentration factors for the plane stress problems is examined and a generalized Stowell formula for the stress concentration factor is proposed for problems in which the applied loading may be pure shear as well as pure tension and, furthermore, other stress states. By the same method of solution, the stress distributions around a rigid circular cylindrical inclusion embedded in an infinite rigid-plastic matrix subjected to uniform transverse pure shear and tension are obtained.