Dynamic plastic response of thin circular plates struck transversely by nonblunt masses

A theoretical analysis is presented which examines the dynamic plastic response of thin circular plates struck transversely by a mass with a conical head and a spherical nose at the centre of the plates. The analysis employs an interaction yield surface which combines the bending moment and membrane force required for plastic flow. Material strain rate sensitive effects are considered with the aid of the Cowper-Symonds equation and Perrone and Bhadra's approximation. Good agreement between the theoretical predictions and the experimental results has been obtained on the maximum permanent deflections and the maximum forces between striker and plates for various impact energies.