Handtool facilitates extraction of circuit modules
Compact handtool extracts electronic modules from circuit board socket. It is used on modules that have four small notches in the base of the plastic housing.
Lusby, T. K., Jr.↗
SEARCH · Engineering Papers
Results for “Notch”
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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Labyrinth-type valve seat increases valve life by decreasing fluid velocity
Labyrinth-type valve seat and a moving piston with V-notch openings reduce the fluid velocity and thus, the erosion rate of regulator valves.
Hicks, J. E.↗
New weldable high strength aluminum alloy developed for cryogenic service
Wrought aluminum alloy has improved low temperature notch toughness and weldability. This alloy can be mill-fabricated to plate and sheet without difficulty. Post-weld aging improves weld ductility and strength properties. A typical treatment is 8 hours at 225 deg F plus 16 hours at 300 deg F.
Source record↗
Application of ultrasonics to detection of fatigue cracks.
Ultrasonic detection of fatigue crack formation in center-notched sheets of steel and alloys of aluminum and nickel
METAL FATIGUE↗
Current status of plane crack toughness testing.
Design and testing of crack-notched specimens for determination of resistance of materials to unstable opening-mode crack extension under plane strain conditions
CRACK PROPAGATION↗
Improved S/N meter
Signal-to-noise ratios /S/N/ meter containing a variable-frequency notch filter measures noise plus interference in the presence of carrier or modulation signals. A noise source and calibration signal source are included in the instrument for calibration purposes.
Windett, C. B.↗
Effect of surface irregularities on bellows fatigue life
Report presents test data on the bending fatigue life of notched sheet specimens. The influence of a surface irregularity on the fatigue life of a metal bellows is evaluated, with emphasis on accidental defects in ducting bellows which are impossible to avoid short of completely eliminating human contact.
Schmidt, E. H.↗
Stress corrosion cracking of titanium alloys at ambient temperature in aqueous solutions
Stress corrosion tests of titanium alloys in distilled and aqueous salt solutions at ambient temperatures employing single edge notched specimens
Gilpin, C. B.↗
Crack growth in 2014-T6 aluminum tensile and tank specimens cyclically loaded at cryogenic temperatures
Crack propagation in aluminum notched tensile and pressure vessel specimens cyclically loaded at cryogenic temperatures
Pierce, W. S.↗
Effects of high-pressure hydrogen on storage vessel materials.
Tensile tests in high pressure hydrogen on various steels, discussing strength and ductility of notched and unnotched specimens
Chandler, W. T.↗
Structural ductility of high strength titanium alloys.
Ductility ratio data for high strength titanium alloys from specially designed experiments and notch strength tests
Papirno, R.↗
Nonlinear interactions of electromagnetic waves with a thermally generated cesium plasma.
The interaction of a large‐amplitude disturbing wave with a thermally generated, highly ionized cesium plasma has been investigated using a small‐amplitude sensing wave as a probe. The subsequent interaction between the disturbing and sensing waves is related to the plasma electron temperature. The plasma was contained in a magnetic field of 500–1000 G and had an electron plasma frequency near 10 GHz and an electron gyromagnetic frequency around 2 GHz. The sensing wave was a 10 GHz plane wave of approximately 1.5 mW input power and the disturbing wave was 7.5 GHz plane wave of about 1.2 W peak power. Measurements of the sensing‐wave transmitted power were made using standard microwave techniques. A notch filter in the sensing‐wave receiving circuit reduced the scattered disturbing‐wave interference to an immeasurably low level. Langmuir probes were used to detect disturbing‐wave modulation and to measure plasma temperatures and densities. Measurements of the interaction were correlated with a solution of the Boltzmann transport equation for a perturbed Maxwellian distribution function with binary Coulomb collisions.
Jack G Hewitt, Jr↗
Effects of high-pressure hydrogen on storage vessel materials
Tensile tests on welded plates of three grades of steel indicate an appreciable decrease of tensile strength and ductility of notched specimens and a decrease in ductility of unnotched samples. Surface cracking, evident in unnotched specimens, is conducive to breakdown in tensile strength and ductility.
Chandler, W. T.↗
Plane strain fracture toughness.
Plane strain fracture toughness determined for crack notched bend specimens using standard test procedure for specific metallic material property
Srawley, J. E.↗
Crack behavior and toughness of 2219-T81 aluminum alloy parent and weldments.
Al alloys sheet, plate and weldments crack behavior and fracture toughness at cryogenic temperatures, using notched and surface flawed plane strain specimens
Kropp, C. J.↗
The values of the parameters of a distributed RC null network
Distributed RC notch filter normalized constants for dominant and nondominant transmission zero
Huelsman, L. P.↗
Propagation of Love waves in layers with irregular boundaries
Love wave propagation in layers with irregular boundaries, investigating scattered field to determine reflection from triangular notch
Wolf, B.↗