This paper describes the elastbplastic buckling behavior ofrsteel plates with circular hole. In any numerical scheme used for the analysis of elastoplastic problems it becomes necessary to integrate the constitive equations governing material behavior. Thus, we describe the method to calculate stresses exactly in range of plastic flow. The analytical model is a perfect elastoplastic thin plate with circular hole under shear force. As a result of numerical analysis, we clarify the buckling strength and necessary width thick- ness ratio to carry yield strength for such a plate.
