Plastic collapse of a circular plate under cyclic loads

The shakedown kinematic approach is used to analyze the collapse modes for a circular plate subjected to cyclic loads distributed axisymmetrically. Depending upon the loading scheme and parameters, the plate may fail by instantaneous, incremental, or alternating plasticity collapse. For quasistatic processes the nonshakedown load may be smaller than the instantaneous plastic limit load. In the case of periodic dynamic loading, which lies outside the framework of plastic limit analysis, the frequency parameter, besides the load amplitudes, can significantly influence the nonshakedown behavior of the plate.