Lamination residual stresses in cross-plied fiber composites
Lamination residual stresses in cross-plied fiber composites
Chamis, C. C.↗
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Application of the method of weighted residuals to the turbulent boundary-layer equations. II - A two parameter prediction technique
Method of weighted residuals /MWR/ applied to turbulent boundary layer equations, describing two parameter prediction technique
Abbott, D. E.↗
Residual structure and mechanical properties of alpha brass and stainless steel following deformation by cold rolling and explosive shock loading
Mechanical responses and residual defect structures in brass and stainless steel following explosive shock loading and cold reduction by rolling
Grace, F. I.↗
Technique for the direct observation of residual defect structures in explosive loaded metal cylinders
Thin walled metal cylinders residual deformation microstructures under internal impulsive loading
Altman, F. D.↗
On the relative residual intensities of the calcium H and K lines
Calcium H and K lines core residual intensities in stars with quiet and active chromosphere, suggesting activity due to thermal gradient
Linsky, J. L.↗
Lamination residual stresses in multilayered fiber composites
Residual stresses arising from fabrication processes in laminates
Chamis, C. C.↗
Residual stresses developed in molding a flat sheet of a chemically-hardening relatively incompressible material
Approximation of residual thermal stresses in flat sheet molded from chemical hardening materials
Levitsky, M.↗
Residual tensile properties of material from C-130 center wing section after service Final report
Flight service effects on residual tensile properties of C-130 aircraft center wing plate section
Kaisand, L. R.↗
Examination of turbulent shear models and the prediction of compressible turbulent boundary layers by the method of weighted residuals
Evaluation of turbulent shear models and prediction of compressible turbulent boundary layers by method of weighted residuals
Abbott, D. E.↗
A residual gas analysis technique for studies of photochemical surface reactions of powders
Residual gas analysis for ultraviolet degradation studies on aluminum oxide powder
Colony, J. A.↗
A search for residual magnetism along a tornado path
Statistical analysis of electrical phenomena associated with tornado activity and search for residual magnetism in buildings near path of tornado
Costen, R. C.↗
Evidence for residual modulation left over from the 1954-1964 solar cycle
Residual modulation from 1954-1964 solar cycle, considering 19th cycle hysteresis loop from cosmic ray balloon data
Neher, H. V.↗
Lamination residual stresses in cross-plied fiber composites
Longitudinal and transverse residual stresses arising in lamination fabrication process of cross-plied fiber composites
Chamis, C. C.↗
Vortex computation by the method of weighted residuals using exponentials
Rotationally symmetric quasi-cylindrical viscous incompressible vortex flow, using method of weighted residuals approximating axial velocity and circulation profiles by series of exponentials
Bossel, H. H.↗
Program for computing partial pressures from residual gas analyzer data
A computer program for determining the partial pressures of various gases from residual-gas-analyzer data is given. The analysis of the ion currents of 18 m/e spectrometer peaks allows the determination of 12 gases simultaneously. Comparison is made to ion-gage readings along with certain other control information. The output data are presented in both tabular and graphical form.
Easton, D. S.↗
Residual Gas Analyzer Calibration
A technique which employs known gas mixtures to calibrate the residual gas analyzer (RGA) is described. The mass spectra from the RGA are recorded for each gas mixture. This mass spectra data and the mixture composition data each form a matrix. From the two matrices the calibration matrix may be computed. The matrix mathematics requires the number of calibration gas mixtures be equal to or greater than the number of gases included in the calibration. This technique was evaluated using a mathematical model of an RGA to generate the mass spectra. This model included shot noise errors in the mass spectra. Errors in the gas concentrations were also included in the valuation. The effects of these errors was studied by varying their magnitudes and comparing the resulting calibrations. Several methods of evaluating an actual calibration are presented. The effects of the number of gases in then, the composition of the calibration mixture, and the number of mixtures used are discussed.
R H Lilienkamp↗
Effect of residual stresses induced by prestressing on rolling element fatigue life
A mechanical prestress cycle suitable to induce compressive stress beneath the surface of the inner race of radially loaded 207-size bearings was determined. Compressive residual stress in excess 0.69 x 10 to the 9th power N/sq m (100,000 psi), as measured by X-ray diffraction, were induced at the depth of maximum shearing stress. The prestress cycle consisted of running the bearings for 25 hours at 2750 rpm at a radial load which produced a maximum Hertz stress of 3.3 x 10 to the 9th power N/sq m (480,000 psi) at the contact of the inner race and the heaviest loaded ball. Bearings subjected to this prestress cycle and subsequently fatigue tested gave a 10 percent fatigue life greater than twice that of a group of baseline bearings.
Parker, R. J.↗