Analysis of Optic and Electric Combines Measurement Uncertainty Under Strong Impact Loading

Abstract

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 layer fracture of the material is easy to occur in the reverse stretching stage. In order to study the movement behavior and law of metal material under strong impact loading, the free surface particle velocity and the movement process of the sample surface with time were obtained by the verify of DISAR and electric probe measurement technique. In this paper, the uncertainty sources of two kinds of test systems are analyzed, and the test error ranges are given respectively. In the two dimensional Lagrange hydrodynamics program, the layer fracture processing function considering void growth, polymerization and collapse effect is added to carry out numerical simulation research. The simulation results show that the layer fracture occurs in the process of loading and unloading, and the experimental data are in good agreement with the simulation results. The width of the platform and the takeoff height of the speed curve are basically the same, and the relative error is not more than 10%.