机械制造与自动化2023，Vol.52Issue(6)：36-39,4.DOI:10.19344/j.cnki.issn1671-5276.2023.06.009
机身蒙皮划窝对结构细节疲劳额定值的影响
Influence of Countersink of Fuselage Skin on Detail Fatigue Rating of Structure
彭乾坤 1周颜 2张彦军 2曾建江 1孙琰翔1
作者信息
- 1. 南京航空航天大学航空学院,江苏南京 210016
- 2. 航空工业第一飞机设计研究院,陕西西安 710072
- 折叠
摘要
Abstract
The fatigue failure of aircraft fuselage skin is a focus needing to be attended to.To evaluate the influence of connection mode(countersunk head and flat head)on its fatigue performance,typical double-shear lap structures were selected for experimental study.The fatigue life of the structure was determined by test to abtain the DFR value of the structure.It is found that the countersunk head reduces the DFR value of the structure by about 22％.The comparison between the DFR value of the structure calculated by theoretical method and the test data shows that the average error of the two methods is 2.10％,which verifies the reliability of the theoretical method and provides a reference for the study of the fatigue performance of the fuselage skin structure.The DFR value of the structure with different skin thickness was calculated finding that the DFR value of the flat head structure decreases gradually with the increase of skin thickness.For the structure with countersunk head,excessive large or small skin thickness will reduce the DFR value of the structure,and 1.5 mm and 1.8 mm skin thickness will be better choices.关键词
疲劳/双剪搭接/肖维勒准则/细节疲劳额定值/疲劳寿命Key words
fatigue/double-shear lap/Chauvenet criterion/detail fatigue rating/fatigue life分类
航空航天引用本文复制引用
彭乾坤,周颜,张彦军,曾建江,孙琰翔..机身蒙皮划窝对结构细节疲劳额定值的影响[J].机械制造与自动化,2023,52(6):36-39,4.
