The biaxial tension of an elastoplastic space with a prismatic inclusion

The problem on the elastoplastic state of a thick isotropic plate (the case of plane deformation) is solved. A larger prismatic inclusion is made a cl ose fit in a polygonal hole in the plate. The plate is stretched at infinit y by constant mutually perpendicular forces. The problem is solved by the s mall-parameter method and by the theory of ideal plasticity. The axisymmetr ic state of the plane with a circular hole stiffened by a round ring with a constant force applied to its inner contour is considered as a zero approx imation. Some specific shapes of the hole and reinforcing elastic rigid rin g are considered.