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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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Ring oscillator and strain gage transmitter development for multichannel biotelemetry system
Differential pressure switch based on photosensitive semiconductor and strain gages
Strain gages, nitrocellulose effects, and mathematical models for hypervelocity launch tubes with propellant lining
NOL ring split-dee tensile test has the advantages that the specimen is readily fabricated by winding and the test is performed in a conventional testing machine without special fixtures. Strain gages cannot be mounted, however, and substantial bending moments are introduced.
Pulling device consisting of structural tube, connecting rod, spring-loaded nuts, loading rod, heating element, and three bulkheads fractures tensile specimens. Alternate heating and cooling increases tensile loading by increments until fracturing occurs. Load cell or strain gage, applied to pulling rod, determines forces applied.
Device determines average rms value of buffet signals by integrating rms signals from strain gages for preselected period of time. System measures average rms value of other transient data, and the upper frequency limit depends on the frequency response of the amplifiers.
Counter for aircraft counts and records number of times the strain at a point in a structural member exceeds each of four preset levels. Counter uses 28 volt dc power supply, metallic resistance strain gage bridge as sensor, integrated and solid state circuits for signal processing, and electromechanical counters for data storage and readout.
Temperature effects on electrical resistivity of metallic strain gage materials
X-15 flight heating simulation accuracy tested and inaccuracy effects on flight load strain gage responses
Apparatus for forming wire grids for electric strain gages
Strain gage accelerometer for angular acceleration measurement
Metal and alloys micro and macro stress-strain behavior data correlated for linear differential transformers, strain gages, longitudinal resonance waves and X ray diffraction
Test program to verify theory used in calculating axial thrust uses turbopump instrumented with /a/ proximity transducers for measuring shaft position, /b/ a strain gage thrust bearing carrier to measure axial thrust, and /c/ internal pressure taps to define component pressure gradients used in thrust calculations.
Strain gages on superpressure balloon flights from Christchurch, New Zealand - Jul. 1968 to Dec. 1969
Strain gage measurement of elongation due to thermally and mechanically induced stresses
Wind tunnel apparatus for reproducing coning and spinning motions of bodies of revolution, using six-component strain gage balance for aerodynamic forces
Elastic properties of lunar surface material from Surveyor spacecraft strain gage data
Transthoracic measurements of left and right ventricular systolic pressures in anesthetized mice, using fiber optics and strain gage manometer techniques