EXPERIMENT AND SIMULATION RESEARCH ON UNIFORM SUPERCHARGED FATIGUE CRACK INITIATION OF AIRCRAFT FUSELAGE SKIN

LIU LiPing; ZHANG Fang; ZHONG XiaoKun; BAO Rui; XU JianXin; QIN WenChao

doi:10.16579/j.issn.1001.9669.2020.04.032

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EXPERIMENT AND SIMULATION RESEARCH ON UNIFORM SUPERCHARGED FATIGUE CRACK INITIATION OF AIRCRAFT FUSELAGE SKIN

更新时间：2022-09-22

- EXPERIMENT AND SIMULATION RESEARCH ON UNIFORM SUPERCHARGED FATIGUE CRACK INITIATION OF AIRCRAFT FUSELAGE SKIN
- Journal of Mechanical Strength Vol. 42, Issue 4, Pages: 960-965(2020)
- 作者机构：
  
  1. 中国民航大学航空工程学院
  2. 北京航空航天大学航空科学与工程学院
- 作者简介：
- 基金信息：
- DOI：10.16579/j.issn.1001.9669.2020.04.032
  CLC：
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LIU LiPing, ZHANG Fang, ZHONG XiaoKun, et al. EXPERIMENT AND SIMULATION RESEARCH ON UNIFORM SUPERCHARGED FATIGUE CRACK INITIATION OF AIRCRAFT FUSELAGE SKIN. [J]. 42(4):960-965(2020)
DOI：

LIU LiPing, ZHANG Fang, ZHONG XiaoKun, et al. EXPERIMENT AND SIMULATION RESEARCH ON UNIFORM SUPERCHARGED FATIGUE CRACK INITIATION OF AIRCRAFT FUSELAGE SKIN. [J]. 42(4):960-965(2020) DOI： 10.16579/j.issn.1001.9669.2020.04.032.

摘要

用自制飞机机身蒙皮均布增压疲劳模拟装置做实验,研究了机身结构蒙皮在均布增压循环载荷0 Psi～7.8Psi作用下的疲劳裂纹萌生情况。并通过有限元仿真分析,研究了机身结构蒙皮疲劳裂纹萌生位置以及疲劳裂纹萌生的先后顺序。研究表明,结构蒙皮在均布增压疲劳载荷作用下,拉钉孔左、右侧会发生疲劳裂纹萌生,疲劳裂纹萌生顺序主要与拉钉孔左、右侧的最大von Mises应力值大小有关,同时受结构蒙皮连接紧度的影响。

Abstract

The fatigue crack initiation of the fuselage structure skin under the uniform supercharged cyclic load of 0 ～ 7. 8 Psi was experimentally studied by the self-made aircraft fuselage skin uniform supercharged fatigue simulation device. The location of the fatigue crack initiation of the fuselage structure skin and the sequence of fatigue crack initiation are studied by finite element analysis. The research showed that under the uniform supercharged fatigue load,fatigue crack initiation occurred on the left and right sides of the nail holes. The fatigue crack initiation sequence is mainly related to the maximum Von-Mises stress value at the initiation site,but also related to the tightness of the connection between the skin and the stringer.

关键词

机身蒙皮均布增压疲劳裂纹萌生

Keywords

Fuselage skinUniform superchargedFatigue crackInitiation

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