Attenuation of transverse ultrasound in copper.
Propagation of shear acoustic waves traveling parallel to magnetic field along symmetry direction in metal crystal
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Propagation of shear acoustic waves traveling parallel to magnetic field along symmetry direction in metal crystal
Dispersion relation for wave propagation in electro-magneto-ionic medium under electric and magnetic fields obtained using Maxwell- Boltzmann-Vlasov equations, discussing cut-off frequency
Plastic response of circular uniform plate to axisymmetric impulse load of Gaussian distribution
Motion picture report of IMP-1 magnetometer observations of interplanetary magnetic field
Magnetoplasma kinetic theory of diffusion across magnetic field, deriving single particle distribution function
Lift drag ratios attainable by slender bodies at hypersonic speeds assuming modified Newtonian pressure distribution and surface constant friction coefficient
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Physiological reactions and acceleration tolerance of humans after hypodynamia
Hemodynamic disorders in human retinal blood circulation during prolonged acceleration
Interaction shock shape prediction for gaseous and liquid injection in supersonic flow, using solid body and complementary models
Plasmon decay by neutrinos emission in strong magnetic field, examining parallel and perpendicular propagation
Mathematical model of nonsimilar laminar or turbulent boundary layer, including entropy layer and turbulence effects, solved by Newton-Raphson iteration
The usual boundary-layer equations describing the steady-state mixing of parallel jets are supplemented by the momentum equation in the direction normal to the flow. This allows detailed computation of the flow field in the mixing region and simultaneous computation of the outer inviscid flow. An explicit and an implicit finite difference scheme have been developed and applied in several illustrative examples. The examples include mixing of planar and axisymmetric supersonic jets of different composition with both matched and unmatched static pressures. Numerical results were compared with available experimental data obtained for the unmatched pressure case.
A theoretical study of the elastic stresses produced in an infinite plate when struck by a high-speed object is presented. The solution is obtained by means of linear elasticity. Laplace transformation techniques are employed to solve the axisymmetric problem. The plate is loaded normal to its surface with a uniform load over a circular area. The normal stress at the wave front of the unreflected dilatation wave along the axis and its variation with the radius of loading are determined. Various facets of the problem are discussed.
The solution was obtained without approximating the dispersion relation. This was made possible by the use of a computer method for carrying out the extremely large number of algebraic manipulations involved. The three-fluid model employed accounts for the interaction of the electron, ion, and neutral species. The solution for the e-folding distance describes the damping characteristics of each wave mode. Each of the e-folding solutions corresponds to one of the phase velocity solutions.
An expression is developed that makes possible the prediction of Poisson's ratio for unidirectional composites with reference to any pair of orthogonal axes that are normal to the direction of the reinforcing fibers. This prediction appears to be a reasonable one in that it follows the trends of the finite element analysis and the bounding estimates, and has the correct limiting value for zero fiber content. It can only be expected to apply to composites containing stiff, circular, isotropic fibers bonded to a soft matrix material.
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Laser Doppler velocimeters are used for measurement of localized fluid velocities without perturbation of flow field. Technique which utilizes only two outgoing beams polarized normally to one another can be processed in such a manner that local oscillator signal is obtained and usual dual-scatter velocity is also retrieved.