Dynamical Response Behavior of Clamped Square Plates under the Impact of Large-Scale Hammer

In order to investigate the dynamic response behavior of clamped square plates under the impact of the large-scale hammer, a large-scale hammer head was designed in combination with the drop hammer tooling. The impact tests of clamped square plates under different impact strength were carried out, and the typical failure modes of clamped square plates under the impact of large-scale hammer were obtained. Based on the experimental results and the impact dynamics theory, the deformation evaluation method of clamped square plates under the impact of large-scale hammer was established. In addition, the boundary tearing criterion of clamped square plates was established by combining simulation analysis. The results indicated that the energy dissipation of clamped square plates under the impact of the large-scale hammer mainly depended on the plastic hinge and in-plane plastic hinge, and the initial tearing firstly occurred in plate boundary. Moreover, the plastic deformation evaluation method of clamped square plates established by the plastic hinge energy dissipation mechanism was in good agreement with the experiment results. In addition, the value of the stress triaxiality at the initial tearing position was nearly 0.6 during the tearing process of the clamped square plates. According to failure criterion established in this paper, the value of B_h was 1.6 times plate thickness. The evaluation method and failure criterion presented in this paper further improve the research on the dynamic response behavior of clamped square plates under the impact of the large-scale hammer.