Impact damage testing based on high-speed continuous water jet aircraft coatings  

作　　者：Minggong SHA Ying SUN Yutong LI Yiming LIU Gregory FEDOTENKOV Lev RABINSKIY Arseniy BABAYTSEV Yulong LI 

机构地区：[1]School of Civil Aviation,Northwestern Polytechnical University,Xi’an 710072,China [2]Joint International Research Laboratory of Impact Dynamics and Engineering Application,Xi’an 710072,China [3]Shaanxi Impact Dynamics and Engineering Application Laboratory,Xi’an 710072,China [4]NPU Yangzi River Delta Research Institute,Suzhou 215400,China [5]Moscow Aviation Institute(National Research University),Moscow 125993,Russia

出　　处：《Chinese Journal of Aeronautics》2024年第10期249-264,共16页中国航空学报（英文版）

基　　金：Supported by the National Natural Science Foundation of China(Nos.12261131505,62005172);the Russian Science Fund(No.23-49-00133);the Fundamental Research Funds for the Central Universities,China(No.D5000210517);the Basic Research Programs of Taicang,China(No.TC2021JC21).

摘　　要：When an aircraft passes through a rainy area at high speed,the coating on the front edge of the fuselage will be continuously eroded by raindrops,causing the coating to wear,crack or even peel off.This paper uses carbon fiber T300 material as the base material,and at the different impact speeds and impact numbers,water cutting equipment was used to simulate the erosion of the coating caused by the continuous impact of water droplets.The damage morphology of samples at different damage stages was observed by digital microscope and Scanning Electron Microscope(SEM),and the damage evolution curve was established to analyze and reveal the damage behavior and damage mechanism of rain erosion.The results show that the degree of damage experienced an increasing trend with the increase of impact numbers and speed,until circular peel damage was formed;no damage occurred during the incubation period,and the curvature of the damage evolution curve increased significantly after the expansion period and eventually showed a stable expansion trend.The mechanical properties of the coating material were the main influencing factors of its rain corrosion resistance.Moreover,the axially symmetric unsteady contact problem of droplets impacting the surface of a solid deformable body was studied.And the contact area was determined based on the iterative algorithm boundary positioning method.A mathematical model and closed mathematical formula describing the unsteady interaction between a droplet and a solid deformable obstacle were proposed.

关 键 词：Rain erosion damage Liquid-solid impact Multiple jets Composite materials Impact dynamics 

分 类 号：V216.55[航空宇航科学与技术—航空宇航推进理论与工程]