|
| Cause Analysis and Repair Discussion on Structure Damage of the Fifth to Eighth Rib Structure of an Aircraft Wing |
| Received:July 29, 2018 Revised:December 25, 2018 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7643/ issn.1672-9242.2018.12.015 |
| KeyWord:outer wing rib damage repair analysis strength |
| Author | Institution |
| YANG Jia-qin |
1. Wuhu State-owned Factory of Machining, Wuhu , China |
| XU Guang-qun |
1. Wuhu State-owned Factory of Machining, Wuhu , China |
| JIANG Ye |
2. ShenYang Aircraft Design and Research Institute, Shen-yang , China |
| FU Bin |
1. Wuhu State-owned Factory of Machining, Wuhu , China |
|
| Hits: |
| Download times: |
| Abstract: |
| Objective To analyze the cause of structure damage of fifth to eighth rib structure of an aircraft wing and to make a repair plan. Methods The causes of the damage were analyzed by means of load analysis, finite element simulation, static test data analysis, etc. The failure morphology of grinding crack was analyzed with SEM and optical microscope. The failure mode of the damaged structure was analyzed. Scientific and simple repair procedures were formulated based on damage cause and failure mode. The repair measures used for the damaged long truss were verified by strength. Results According to theoretical analysis, finite element simulation calculation, backstepping results of static test data and actual damage situation of aircraft, the conclusion was that the dangerous parts of the tank failure theory were in accordance with the actual damage situation. And the most dangerous structural parts of the finite element simulation were the first to be in line with the actual structure. It can be taken as the basis for formulating in-depth repair procedures and predicting the actual loading pressure. According to the backstepping results of the static test data, the conclusion of the damage check and the finite element simulation, the pressure of the tank was about 0.5 MPa when the fifth to eighth rib structure was damaged. The repair plan for replacing the damage fifth to eighth rib structure inside the fuel tank of wing was formulated. It was verified by the structure strength and the design requirement was met. Conclusion The cause of the damage of fifth to eighth ribs of an outer wing is that the fuel tank pressure is more than the design value. The repair of the damaged truss and the replacement of the damaged fifth to eighth rib structure meet the design requirement on strength. It could guide cause analysis and repair of structure damage of similar aircrafts. It reminds us that serviceman of aircraft should pay attention to the overload issue on fuel tank of the outer ring. |
| Close |
|
|
|