Abstract
In this investigation, the magnitude and position of the maximum stresses, as well as the stress distributions (maximum sheading stress) of critical sections of large plates perforated by circular holes and subjected to two-dimensional hydrostatic tension, were determined by PhotoStress method. The plates tested had (1) four circular holes on a ring, (2) four circular holes on a ring with a central hole, (3) four circular holes on the first ring, and four circular holes on the second ring -- in parallel position, and (4) four circular holes on the first ring and four circular holes on the second ring -- 45°apart from parallel position. A series of tests, with different ratios of hole diameters to ring diameters have been performed in each case mentioned. The PhotoStress material used to make the models was Epon 828, a product of Shell Chemical Company. Only plastic plates have been used, and aluminum paint was sprayed on the bottom surface of the plastic model in order to make a mirror surface, which served the same purpose as an actual structural surface for the reflection of light. A technique for applying two-dimensional hydrostatic tensions on the periphery of a large p late was developed in order to carry out the investigation. Curves of stress distribution in dimensionless form have been plotted for the various sections in each PhotoStress model. Some comparisons were made between the experimental results and analytical values, whenever the latter were available.
Sun, Pu-Ning (1964). Investigation of stresses in a plate containing circular holes. Doctoral dissertation, Texas A&M University. Texas A&M University. Libraries. Available electronically from
https : / /hdl .handle .net /1969 .1 /DISSERTATIONS -174545.