When the metal material undergoes a series of physical processes such as strong impact loading, unloading, reverse stretching and reloading in the complex system, the spallation of the material is easy to occur in the reverse stretching stage. In order to study the movement behavior and law of metal materials under strong impact loading, the free surface particle velocity and the movement process of the sample surface with time were obtained by the combined measurements of VISAR (velocity interferometer system for any reflector) and electric probe technique. In this paper, the uncertainty sources of two kinds of systems are analyzed, and the test error ranges are given respectively.
In the two-dimensional Lagrange hydrodynamics program, we have added the hole fracture growth, polymerization and collapse effect of spallation processing function, and verify the model and program code through a numerical example. In the comparison between the experimental results and the calculated results, the width of the platform area and the takeoff height of the speed curve are in good agreement, and the relative error is less than 10%. In order to verify the reliability of numerical simulation, the research on the test method of grid independence and time independence is carried out. The influence of grid number and time step on the platform width in velocity curve is analyzed, and the determination method of grid number and time step is discussed.