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FORTRAN IV listings and check-case outputs are given for userinteractive programs CIRCLE and ELLIPSE. The programs suppose either circular or elliptical inclusions, respectively, in an edge-loaded elastic plate, and calculate differential stress concentration factors over a 10 x 11 array of physical points which can be specified by the user. Differential stress concentration factor is defined in this case to be the amount by which the radius of Mohr's circle expands in the vicinity of the inclusion. The two programs handle two-dimensional geometry only. Both programs print extensive prompt-lists to help the user on input. Equations for stresses in the vicinity of a circular cylindrical elastic inclusion in an edge-loaded elastic plate may be found in Jaeger and Cook . Similarly, the solution for an elliptical, cylindrical 2 inclusion is given by Donnell . In both cases, the generators of the cylinder are taken perpendicular to the plane of the stresses, so that the problems under consideration are strictly two-dimensional. The stresses depend on the contrast in rigidity, XK, between inclusion and plate, and on the Poisson's ratios, PRP and PRI,of plate and inclusion,

u.s. geological survey open file report/open-file report

FORTRAN programs to calculate differential stress concentration factors around two-dimensional circular and elliptical inclusions in an edge-loaded plate