Application of High Spatially Resolved Areal Array Velocity Measurement in the Cracking Behavior of Materials

The dynamic behavior of heterogeneous materials, such as semiconductor materials, under impact loading is one of the experimental studies to improve the material properties. However, the non-uniformity of the material, such as grains and defects, is around 100 microns, which requires high-spatially resolved and high-dimensional measurement methods. In this paper, an area array fiber optic probe with 100-micron spatial resolution is designed, and the two-dimensional continuous measurement of the free surface velocity of heterogeneous materials is realized on the light gas gun platform with DISAR velocimetry technology. The dynamic behavior change process under different positions is obtained, which provides experimental data for the study of the impact response of polycrystalline materials.