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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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Fixture facilitates inspection testing of circumferential pipe welds for vacuum tightness, using helium gas as a leakage tracer in conjunction with a mass spectrometer. It consists of a split rubber torus and a mating clamping ring with a vacuum hose fitting.
Cutoff-type high gain amplifier coupled by a diode prevents overdriving of operational amplifier. An amplified feedback signal offsets the excess input signal that tends to cause the amplifier to exceed its preset limit. The output is, therfore, held to the set clamp level.
Piezoresistive transducer measures gas pressure inside sealed secondary electrochemical cells without breaking the seal. This method is based on the observed fact that the force exerted by the cell faces on the clamp tightening them against the transducer is a function of the gas pressure inside the cell.
Motion analysis for rigid-plastic cylindrical shell clamped at both ends and subjected to internal impact load
Equilibrium, compatibility, and contour equations for bending in rectangular flexible plate rigidly clamped to elastic ribs
Dynamic stability of solid shallow shell of revolution with arbitrary elastic clamping at edge
Stresses in infinitely long strip of finite width containing semiinfinite crack calculated for displaced clamped boundaries, using Wiener-Hopf technique
Identical flutter boundaries of multibay and one- bay panels with clamped edges in high and low supersonic regions
Effect of axisymmetric impact against water on shallow clamped aluminum spherical shell-type caps
Pipe plug for remote installation in an open-ended pipe used in a hazardous environment provides a gastight seal by expanding a rubber seal against the inside surface of the pipe opening, with mechanical clamps contacting the pipe flange for positive retention of the plug.
Molding press is used to form phenolic resin impregnated glass fiber cloth into a high-density, cylindrical-ring laminate. The press applies clamping pressure and heat to a mold containing the glass fiber cloth laminate, which has hydrostatic pressure applied to it by means of a specially designed pressure plug.
Scaling, clamping pressure, and liquid lubricant effects on damping in practical joint-cantilever beam assembly
Clamping system for maintaining natural line widths of Mossbauer absorbers at varying temperatures
Method utilizes a standard terminal lug, a braided wire passed through the barrel and overlapping the top of the lug, and a ferrule to clamp the end of the wire. Electrical connectors can be sterilized and visibly inspected for reliability.
Greater centrifugal radial growth of the preimpeller hub with respect to the impeller and nut at operating speed alleviates clamping and alignment problems in high speed rotating machinery. Design results in axial tightness and radial piloting of the preimpeller.
Compatible triangular plate elements for normal and in-plane displacements, discussing nine degree of freedom element, strain energy, simply supported and clamped plates
Elastic buckling and initial postbuckling behavior of clamped shallow spherical shells under axisymmetric load
One motion of a manual clamp makes a universally flexible arm instantly rigid in any configuration. Device is locked rigid by meshing of gear teeth, providing great resistance to loading.