存储参数对适航用冰雹力学性能的影响

Artificial hail is mostly used in aircraft shell and engine testing， and its mechanical properties have a direct impact on the test results. Considering the storage problem of artificial hail after production， the influences of storage parameters (storage temperature and time) on the mechanical properties of artificial hails were explored with the help of experimental research methods. In terms of storage temperature，the results showed that the estimated maximum compressive strength values of pure ice hails and cotton-containing hails increased to a certain extent at −10， −15 ℃ and −25 ℃ storage temperatures，and the maximum increment was 73% and 80%. In terms of storage time，the results showed that after storage for 5 h，10 h and 20 h at −20 ℃，the estimated maximum compressive strength values of pure ice hails and cotton-containing hails showed a trend of first decrease and then increase， and the maximum value was obtained under the condition of 20 hours of storage，which increased by 113% and 54%，respectively，compared with the unstored hails. Therefore，the influences of storage parameters on the mechanical properties of hail cannot be ignored and need to be considered during airworthiness testing.