Deformation mode and strain field analysis of clamped air-back circular plate subjected to underwater explosive loading

To explore anti-explosion and anti-shock performance of ship structure, the underwater explosive experiments to 5A06 aluminium alloy clamped circular plate were carried out by non-explosive underwater shock loading device. A digital high-speed camera was used to record the detailed processes of plate deformation and obtain the deformation history of clamped circular plate under underwater explosive loading. And the effects of the underwater shock wave strength on the plate deformation mode were compared among three different experiments. Based on the experimental results, the formulas of reduction rate and strain field of clamped circular plate subjected to underwater explosive loading was obtained after employing the same volume principle and rigid-plastic assumption. The theoretical calculation results are in good agreement with experiment results.