Download or read book Performance Tests of Wire Strain Gages written by William R. Campbell and published by . This book was released on 1946 with total page 606 pages. Available in PDF, EPUB and Kindle. Book excerpt: Results of calibrations to determine axial and transverse strain sensitivities are presented for 15 types of single-element, multistrand wire strain gage.
Download or read book Performance Tests of Wire Strain Gages written by William R. Campbell and published by . This book was released on 1944 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt: Results of calibrations in axial tension over the strain range of 0 to 0.0024 are presented for 15 types of single element multistrand wire strain gages. The majority of gages showed significant differences between the calibration factors for strain increasing the strain decreasing. Zero shift and nonlinearity between gage output and strain were present in nearly all gages. Improvement in gage performance after preloading was apparent in most cases. The maximum difference between the calibration factors for the gages of a given type and the average factor for the type ranged from 1 percent or less for the gages of types B, F, I., M, N, and J to more than 7 percent for the gage of types G and H.
Download or read book Performance Tests of Wire Strain Gages written by William R. Campbell and published by . This book was released on 1945 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt: Results of calibrations in axial tension over the strain range of 0 to 0.03 are presented for 15 types of single element, multistrand wire strain gages. The relation between change in resistance and strain showed deviations from linearity to a strain of about 0.01 which were of the same order as the deviations previously found in tensile calibrations at low strains. At higher strains the curve of change in resistance versus strain in many cases approached a straight line having lower slope than the initial slope. Gages failed by rupture of the wire strands in 58 percent of the calibrations. Measurements for decreasing strain after an applied strain of 0.03 indicated hysteresis in all cases. The strains computed from the measured changes in resistance of gages of types A, C-1, D, and F, using the average calibration factors for low tensile strains, differed less than 5 percent from the measured strains up to a strain of 0.03.
Download or read book Performance Tests of Wire Strain Gages written by William R. Campbell and published by . This book was released on 1945 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt: Results of calibratios in axial compression over the strain range 0 to 0.0021 are presented for 15 types of single element multistrand wire strain gages. The majority of gages showed significant differences between the calibration factors and strain increasing and strain decreasing. Zero shift and nonlinearity between gage output and strain were present in nearly all gages. Improvement in gage performance after prestraining was apparent in most cases. The maximum difference between the calibration factors for the gages of a given type and the average factor for that type ranged from 1 percent or less for the gages of bypes B, M, ad N to more than 4 percent of the gages of types E, G, I, K, and L.
Download or read book Performance Tests of Wire strain Gages written by William R. Campbell and published by . This book was released on 1948 with total page 25 pages. Available in PDF, EPUB and Kindle. Book excerpt: Variations in calibration factor and gage resistance with temperature are given for 15 types of single-element, multistrand wire strain gage. For 13 types of gage the maximum difference between room temperature calibration factor and that between -73 and 93 degrees C did not exceed 4 percent. Measurements of unit change in gage resistance between -73 and 93 degrees C on gages attached to unstressed steel and aluminum-alloy bars indicated for 12 out of 14 types of gage a scatter in gage output for 10 gages of a given type which did not exceed 10 x 10−6 / degrees C.
Download or read book Performance Tests of Wire Strain Gauges written by William R. Campbell and published by . This book was released on 1947 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Performance Tests of Wire Strain Gages written by William R. Campbell and published by . This book was released on 1947 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: Results of tests to determine the combined effects of rigidity and thickness of wire strain gages on indicated bending strains in thin sheet metal are presented for 15 types of single-element multistrand wire strain gages. In most cases the indicated extreme-fiber bending strain was greater than the actual strain. It was concluded that the positive error caused by the finite thickness of the gage predominated over the negative error casued by the rigidity of the gage. The combined effect of thickness and rigidity was suhc as to increase the indicated strains of the different gages from 5 to 40 percent for a sheet thickness of 0.026 inch. Errors in indicated strain ranged from 0 to 9 percent for a sheet thickness of 0.125 inch.
Download or read book Tests of Six Types of Bakelite bonded Wire Strain Gages written by William R. Campbell and published by . This book was released on 1948 with total page 690 pages. Available in PDF, EPUB and Kindle. Book excerpt: Tests were made to determine the important performance characteristics for six types of bakelite-bonded wire strain gages commercially available and in current use by the aircraft industry. Results on the following characteristics are presented: (1) uniformity of calibration factors for individual gages of the same type, (2) variation of calibration factor with temperature, (3) creep, (4) effect of current on gage resistance, and (5) variation of gage resistance with temperature.
Download or read book Technical Note National Advisory Committee for Aeronautics written by United States. National Advisory Committee for Aeronautics and published by . This book was released on 1948 with total page 876 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Index of NACA Technical Publications written by United States. National Advisory Committee for Aeronautics and published by . This book was released on 1949 with total page 616 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book National Bureau of Standards Handbook written by and published by . This book was released on 1961 with total page 988 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Simply Supported Long Rectangular Plate Under Combined Axial Load and Normal Pressure written by Samuel Levy and published by . This book was released on 1944 with total page 738 pages. Available in PDF, EPUB and Kindle. Book excerpt: The results indicate it to be conservative design in the elastic range to neglect the effect of lateral pressure on the sheet buckling load and on the load carried by the sheet after buckling.
Download or read book Technical Note written by and published by . This book was released on 1947 with total page 388 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Characteristics and Applications of Resistance Strain Gages written by United States. National Bureau of Standards and published by . This book was released on 1954 with total page 150 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Investigation of Aircraft Heaters written by Llewellyn Michael Kraus Boelter and published by . This book was released on 1948 with total page 666 pages. Available in PDF, EPUB and Kindle. Book excerpt: An analysis is presented of the factors determining the power efficiency of radiation thermopiles of that type in which the receivers consist either of parts of the conductors themselves or of coatings or other electrically insulating materials in intimate contact with these conductors. On the basis of this analysis, which is applicable to thermopiles of a wide variety of constructions and materials, criterions for maximum power efficiency can be calculated. Such criterions are obtained for a silver-constantan plated-type thermopile. The design and construction of thermopiles in accordance with these criterions are described, and test data are reported, showing agreement between actual and predicted performance.
Download or read book Handbook of Supersonic Aerodynamics written by R. J. Volluz and published by . This book was released on 1961 with total page 512 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Handbook of Supersonic Aerodynamics written by Johns Hopkins University. Applied Physics Laboratory, Silver Spring, Md and published by . This book was released on 1961 with total page 516 pages. Available in PDF, EPUB and Kindle. Book excerpt:
