邹建胜,朱杰.民机衬套修理技术对金属结构疲劳性能的影响研究[J].民用飞机设计与研究,2018,(1):67-
民机衬套修理技术对金属结构疲劳性能的影响研究
Influence of Repairing Technique by Bushing on Fatigue Performance of Metal Structure for Civil Aircraft
  
DOI:10.19416/j.cnki.1674-9804.2018.01.012
中文关键词:民机  衬套  疲劳  细节疲劳额定值(DFR)
英文关键词:civil aircraft  bushing  fatigue  detail fatigue ratio(DFR)
基金项目:
作者单位
邹建胜,朱杰 上海飞机设计研究院上海201210 
中文摘要:首先研究了民机衬套修理技术对金属结构疲劳性能的理论影响,得出了主要影响参数,包括衬套孔径和衬套初始干涉量;然后通过数值模拟手段,建立了关于典型连接结构的有限元模型,分析了在不同衬套孔径和初始干涉量条件下,连接结构衬套孔边的最大径向压应力变化趋势;最后设计了若干组试片级疲劳试验,研究了衬套孔径和衬套干涉量对细节疲劳额定值(DFR)的影响,得出了当前工艺水平下的定量疲劳影响结论。
英文摘要:Firstly,the theoretical influences of repairing technique by bushing on metal structure of civil aircraft are studied, and the predominant bushing factors, including bushing diameter and bushing initial interference fit level were obtained. Secondly, the numerical simulation is adopted to build the FE model of the typical structure and the radial stress variation along the R direction at the critical point of the bushing hole was analyzed under the conditions of different bushing diameters and different bushing interference fit levels. Finally, several groups of fatigue tests are designed to study the effects of bushing factors on the detail fatigue ratio (DFR) of typical structure, and the qualitative fatigue conclusion was obtained under the process level at present.
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