A study on fracture of metal plate under the detonation wave interaction.

• The first study using the threshold impact velocity as a criterion to estimate the fracture of metal plate. • Experiments of metal plates under the load of detonation waves interaction were conducted. • The fracture mechanism of metal plates under explosive load was studied theoretically with a method of micro-element. In this paper, the response of metal plates under the interaction of detonation wave is studied experimentally and numerically. Detonation wave interaction experiments were carried out on metal plates of different materials and thicknesses, and different results such as incision, partial fracture and complete fracture were obtained. ALE algorithm and fluid − solid coupling mode were used to simulate the conditions similar to experiments, and the fracture process and pressure distribution of the metal plate were analyzed. The experimental results were in good agreement with the simulation results. Finally, based on the micro-element fracture theory, the theoretical analysis of the fracture law of the metal plate was carried out, and the fracture criterion based on the threshold impulsive velocity was concluded. It has been verified that this criterion is in good agreement with the simulation and experimental results. It can be used as a basis for estimating the fracture problem of metal plates under explosive load. [ABSTRACT FROM AUTHOR]