Crater forming process by liquid drop impacting liquid multi-layer target

In this article, the experiment of the impacting by liquid drops against liquid multi-layer target was carried out. From the results, a theoretical analysis was made to study the principle of the crater forming process. The crater was formed only in the first layer of the liquid target within certain impacting energy. The interface energy was one of the important parameter of crater forming process if there were dissolution phenomena between the liquid multi-layers. According to energy conversation and the analysis of the impacting energy transformation, the equation of the cavity diameters was obtained. It was found that the results of experiment agreed with that of theoretical analysis very well. The results of simulating experiments predicted that using the metal multi-layers construction would enhance the protection capability, which can be used as the reference for protection design of aircrafts.