Abstract：In the problem of hypervelocity impact, it is difficult to accurately obtain the crater morphology in some conditions. Studying the damage zone can make up for this deficiency, and provide important basis for the study of impact mechanism and verification of numerical simulation. There is relatively little research on numerical simulation of damage zone, mainly due to the lack of experimentally validated damage zone criteria. In this paper, the results of the existing quantitative measurement of damage zone were summarized. It is found that, for the same target, the depth of the damage zone obtained by multiple microscopic testing methods is relatively consistent, which provides convenience for the analysis of the damage zone. Based on the iSALE code, the applicability of total plastic strain (TPS), damage factor (D) and peak pressure as damage zone criteria is analyzed. The results indicate that, TPS = 0.1 is suitable as damage criterion; D = 1 could be used as damage criterion with caution; peak pressure is not suitable as damage criterion. Through parameter analysis, it is found that with the increase of porosity and target strength, the damage zone gradually decreases.
2024, Vol. 45 
