STRAIN DISTRIBUTION IN HY-80 STEEL PLATES COLDFORMED TO SMALL RADII.
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)
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 28, 1963
- Accession Number
- AD0459939
Entities
People
- S. T. Rolfe
Organizations
- U.S. Steel