STRESS-CONCENTRATION EQUATIONS FOR STRAIGHT-SHANK AND COUNTERSUNK HOLES IN PLATES

Stress concentration equations for straight shank and countersunk hole s in a large plate subjected to various lending conditions encountered in service were developed from three-dimensional finite element solut ions. For straight shank holes, three types of loading: remote tension , remote bending and pin loading were considered; and for the counters unk hole only remote tension and bending loads were considered The equ ations are within one percent of the finite element results and are va lid for isotropic materials with Poisson's ratio of 0.3.