Investigation on lunar water ice simulant under impact load is essential for future lunar exploration in the south polar region of the moon. In this paper, the impact dynamic properties of lunar water ice simulant are investigated by using an FDM-DEM coupling method, and the effectiveness of the method and the rationality of parameters are verified by comparing simulation results with experimental results. The results indicate that the FDM-DEM coupling method can effectively simulate the impact dynamic properties of lunar water ice simulant, and find that the lunar water ice simulant exhibits strain rate enhancement effect, the enhancement effect is more pronounced with increasing water content. Furthermore, the quantitative damage degrees and visualized failure patterns are obtained, the damage degrees and failure patterns of lunar water ice simulant show a strong dependence on the water content and impact velocity. But when the water content is 5%, the damage degree is close to 95% and basically no longer affected by impact velocity. (c) 2024 The Society of Powder Technology Japan. Published by Elsevier B.V. and The Society of Powder Technology Japan. All rights reserved.
