Corrosion treatments and the fatigue of aerospace structural joints

Jaya, Aditya; Tiong, Ung Hing; Mohammed, R; Bil, Cees; Clark, Graham

doi:10.1016/j.proeng.2010.03.164

Cited by 9 publications

(4 citation statements)

References 2 publications

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“…Нажаль, як було показано в дослідженнях [2,3], процес захисту заклепокових з'єднань застосуванням плівкоутворюючих сполук супроводжується, в деяких випадках, негативними побічними ефектами, які полягяють в знаженні циклічної довговічності елементів конструкцій.…”

Section: вступunclassified

Експериментальне Дослідження Впливу Плівкоутворюючих Антикорозійних Сполук На Втому Заклепкових З’єднань

Gavrylov

2024

aktt

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The subject matter of this article is the influence of film-forming corrosion preventive compounds on aviation riveted joints fatigue life. The goal of this work is to develop a method for the assessment of negative side effects caused by the application of corrosion preventive compounds. Tasks of the work are as follows: analysis of the aircraft corrosion problem; critical review of existing publications concerning possible negative side effects caused by the application of corrosion preventive compounds for protection of aviation riveted joints against corrosion, where reduction of the fatigue life is considered as a result of the preventive compounds penetration into the gaps of riveted joints; development of the specimen for fatigue tests, with features of contemporary transport aircraft typical design; fatigue tests of the riveted specimens treated with preventive compounds and without treatment; investigation of the preventive compounds penetration into the gap of riveted joint. The main method of this research is fatigue loading of the riveted specimens at loads close to those the aircraft encounters in service. The main result is the experimentally proven possibility of negative side effects of corrosion preventive compound application. The observed effect is explained by the change in friction in joints and the corresponding redistributions of the forces between the joint elements. It was found that a factor influencing friction force is the viscosity of the preventive compounds. The possibility of preventing negative side effects by optimizing the protective procedure has been experimentally proven. Conclusions. The results presented in the paper show the probability of the negative side effects of corrosion preventive compound application. Considering the variety of these materials and their physical and chemical characteristics, the necessity of the grounded selection of the protective compounds is evident as well as the optimization of the treatment technology. Conducted research has revealed an example of the negative influence of preventive compounds on riveted joints fatigue life and has opened the way for this effect prevention. The described research procedure is a component of the complex method for exploring corrosion preventive compounds’ negative side effects.

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Section: вступunclassified

Експериментальне Дослідження Впливу Плівкоутворюючих Антикорозійних Сполук На Втому Заклепкових З’єднань

Gavrylov

2024

aktt

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“…Investigations were carried out with approved in aviation CPCs and rivet joints of transport category planes [6][7][8][9] and of light planes. 10 Authors of the experiments [6][7][8][9][10] founded essential reduction of the rivet joints fatigue life and have proposed probable mechanism of the phenomena.…”

Section: Side Effects Of the Cpcsmentioning

confidence: 99%

“…The treatment is carried out during the overhaul and maintenance. Protective properties of CPCs are proved and explained by numerous researches and current practice, for example, 4,5 but the probability of negative side effects [6][7][8][9][10] requires special attention and methods for testing.…”

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confidence: 99%

Influence of corrosion preventive compounds on the friction force in aircraft lap joints

Gavrylov¹,

Karuskevich

Игнатович

et al. 2021

Fatigue Fract Eng Mat Struct

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“…While the Ballistic Parachute Recovery System (BPRS), made popular by Cirrus, has demonstrated effectiveness in reducing fatality after a wide variety of accident conditions but these systems are expensive to maintain and expensive to retrofit in older aircraft (Alaziz et al, 2017). These aging training aircraft are currently operated past the service life for which they were originally designed so there is an inherent concern for structural integrity (Jaya et al, 2010). Due to this, it's reasonable to expect more of these ADs focused on fatiguing metal to spring up in the future and data on accidents in the common training aircraft is important to help assess the appropriateness of the ADs and safety of the aircraft in general.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Wing Separation and Mid-Air Breakup in Light Training Aircraft

Hirabayashi

2021

Aviation

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Despite increasing discussions concerning the recently published wing spar airworthiness directive (AD) that affects many training aircraft and several current ADs for wing struts, there remains limited objective literature on incidents of wing separation or mid-air breakup. This paper attempts to report and analyse instances of wing separation and mid-air breakup of light training aircraft. A careful review of the United States National Transportation Safety Board (NTSB) aircraft accident database revealed that wing separations were more likely occur as mid-air breakup in PA28s than 172s/182s (OR: 3.06, 95 % CI: 1.3682 to 6.8536, p = .008). Additionally, wing separations were less likely to occur as mid-air breakups in the strutted 172s/182s than 177s/210s that don’t have a wing strut (OR: 0.11, 95 % CI: 0.04 to 0.29, p = <.001). This implies that non-strutted wing designs may be more susceptability to mid-air breakup than the strutted design of similar aircraft.

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Corrosion treatments and the fatigue of aerospace structural joints

Cited by 9 publications

References 2 publications

Експериментальне Дослідження Впливу Плівкоутворюючих Антикорозійних Сполук На Втому Заклепкових З’єднань

Експериментальне Дослідження Впливу Плівкоутворюючих Антикорозійних Сполук На Втому Заклепкових З’єднань

Influence of corrosion preventive compounds on the friction force in aircraft lap joints

Analysis of Wing Separation and Mid-Air Breakup in Light Training Aircraft

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