Accession Number : AD0459939


Title :   STRAIN DISTRIBUTION IN HY-80 STEEL PLATES COLDFORMED TO SMALL RADII.


Descriptive Note : Progress rept.,


Corporate Author : UNITED STATES STEEL CORP MONROEVILLE PA APPLIED RESEARCH LAB


Personal Author(s) : Rolfe, S T


Report Date : 28 Feb 1963


Pagination or Media Count : 47


Abstract : The first phase of this study involved the measurement of the longitudinal strain distribution observed in the cold-formed plates and a comparison of the observed strains with those calculated from theory. The results showed that the measured strains ranged from +18.35 percent on the tension surface to -14.16 percent on the compression surface of a plate cold-formed to an inside radius of 7-3/4 inches, from +13.31 to -12.00 percent and from +6.34 to -6.00 percent for plates cold-formed to inside radii of 10-1/4 and 20-3/4 inches, respectively. Within the ranges studied, the strain varied linearly through the thickness of the plates. The results also showed that the top surface (tensile) strain was greater than the bottom surface (compressive) strain because of a shift in the neutral axis from the centroidal axis toward the center of curvature. Excellent agreement was obtained between the measured strains in the cold-formed plates and those that were calculated by using a theory based on a shift of the neutral axis. Based on this theory, a simple, accurate method is presented for determining the strain at any point in a cold-formed plate. This method requires only the measurement of the thickness of the undeformed plate and the inside radius of the cold-formed plate. (Author)


Descriptors :   *STEEL , STRAIN(MECHANICS) , MEASUREMENT , TENSILE PROPERTIES , COMPRESSIVE PROPERTIES , DISTRIBUTION , METAL PLATES


Distribution Statement : APPROVED FOR PUBLIC RELEASE