Aircraft life extension based on incremental assessment: Method and application

GUAN Yu; CHEN Liang; CAO Qikai

doi:10.7527/S1000-6893.2021.25782

ACTA AERONAUTICAET ASTRONAUTICA SINICA >

2021 , Vol. 42 >Issue 8: 525782 - 525782

DOI: https://doi.org/10.7527/S1000-6893.2021.25782

Article

Aircraft life extension based on incremental assessment: Method and application

GUAN Yu ,
CHEN Liang ,
CAO Qikai

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1. Department of Comprehensive Strength, AVIC Shenyang Aircraft Design & Research Institute, Shenyang 110035, China;
2. Faculty of Vehicle Engineering and Mechanics, Dalian University of Technology, Dalian 116024, China;
3. Chief Designer's Office, AVIC Shenyang Aircraft Design and Research Institute, Shenyang 110035, China

Received date: 2021-04-15

Revised date: 2021-05-08

Online published: 2021-05-24

Supported by

Equipment Development Department Project

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Abstract

In order to maximize the life potential of aging aircraft, an aircraft life extension method based on increment assessment is proposed and applied. Taking the life increment assessment as the main way, we study the basic point of life extension, renew the structure and get the life increment. By using the equivalent flying hours which reflect the severity of the aircraft as the base point of life extension, the ageing aircraft has been scientifically treated. To carry out the deep demolition and damage assessment of 4 kinds of aircraft from different status to life, master the key parts of fatigue, and establish the base point of structural repair. The technical system of extended service life of aircraft is established, which is based on the durability repair of weak parts of fatigue and the additive manufacturing repair in key parts and high precision damage detection in concealed areas. At the lower weight cost, the original fatigue quality of the body structure is greatly improved, the accumulated damage is "cleared", the structure state "unified", all the hidden troubles and faults affecting the flight safety are eliminated, and the structure of the body is "re-updated". Then, drawing on the structural repair and life extension of the aircraft, the life increment of the aircraft is verified and a complete technical system is formed through the full-size fatigue test system,

Key words： aircraft; extension of life; demolition inspection; cold spray; durability repair; stress corrosion; dispersion coefficient

Cite this article

GUAN Yu , CHEN Liang , CAO Qikai . Aircraft life extension based on incremental assessment: Method and application[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2021 , 42(8) : 525782 -525782 . DOI: 10.7527/S1000-6893.2021.25782

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