| With the deep space exploration and the Chinese lunar exploration program development, it's necessary to further study the damage characteristics of micro-meteoroid impacting on the spacecraft, Particularly the threat from Mm-level micro-meteoroids, because of its small size and difficult to observe and forecast, the spacecraft is generally designed to the structure of passive defense to protect the safe operation of spacecraft. Therefore, it is helpful to understand damage characteristics of mm-level micro-meteoroid hypervelocity impacting on spacecraft before the design of protective structures.First of all, through the research of micro-meteoroid environment, analyzing distribution of micro-meteoroids, chemical composition and physical and mechanical properties. According to their similarity of chemical physical properties, select the diamond and volcanic rocks as a typical simulation of micro-meteoroid material. Carrying out diamond,volcanic rock projectiles hypervelocity impact on the typical spacecraft materials and typical Whipple structuresSecond, according to the micro geometry of volcano rock, Using ANSYS establishes the volcanic micro-geometry model. And through analyze simulation and test results, verify the reliability of numerical simulation.At the end ,Studying the volcanic projectile hypervelocity impact honeycomb sandwich structure, and using the APDL of ANSYS establishes the model of honeycomb, and coupling the methods of SPH-Lagrange to simulate a volcanic projectile hypervelocity impacts honeycomb sandwich structure. Through experimental results show the reliability of the numerical simulation. Analysis the relationship with the energy of each part, when the volcanic projectile hypervelocity impact honeycomb sandwich structure. The results show that In the hypervelocity impact process,the top and bottom panels of the honeycomb have been convert a larger energy, and the honeycomb core has been absorbed a small part of energy.
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