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Now showing items 51-57 of 57
The effect of diffused hydrogen on the torsional fatigue life of 2024-T351 aluminum alloy
(Virginia Polytechnic Institute and State University, 1978)
Fatigue tests in reversed torsion were run on 2024-T351 aluminum alloy specimens into which hydrogen had been diffused. The diffusion was accomplished by placing the specimens in a hydrogen environment (>99.5%) for 25 days ...
An improved digital computer model of the neonatal repiratory system
(Virginia Polytechnic Institute and State University, 1977)
An improved digital computer model of the neonatal respiratory system was developed. Using previous models as a basis, important improvements were made in order to accurately simulate infant blood gas chemistry and its ...
Pressure distribution on a rotating axial-flow compressor blade
(Virginia Polytechnic Institute and State University, 1976)
An investigation of mean rotor blade surface pressures was conducted over a range of operating conditions. The pressures were measured at three span positions and five chord positions on both auction and pressure sides. ...
Effect of relative humidity on the fatigue characteristics of mild steel in reversed torsion
(Virginia Polytechnic Institute and State University, 1972)
Reversed torsion fatigue tests were conducted on both notched and unnotched specimens of SAE 1018 steel. The tests were made on a Sonntag Universal Fatigue Testing Machine at the rate of 1800 stress cycles per minute. The ...
The development of a computer program using a modified room acoustics approach to determine sound levels in regular rooms
(Virginia Polytechnic Institute and State University, 1974)
A program was developed which calculated sound pressure levels at an array of points in a room. Necessary inputs are the room dimensions, sound power or sound pressure levels for the sources, absorption coefficients for ...
Design analysis of a drilled geothermal well
(Virginia Polytechnic Institute and State University, 1974)
An insulated coaxial pipe for a 50,000 ft drilled geothermal well was designed, in order to remove heat from the earth's crust by the circulation of water through a single well. The design took into consideration means of ...
The development of a dynamically coupled axial-torsional-lateral point transfer matrix for a whirling eccentric mass
(Virginia Polytechnic Institute and State University, 1974)
A point transfer matrix for a whirling eccentric mass was developed. Two right handed cartesian coordinate systems, a fixed and a rotating, were used in the derivation. The state variables and the elliptical whirl orbit ...