Fatigue Life Estimation of the Critical Wing Structure in a New-Generation Stol Aircraft

• Autorzy: Dewa Rando Tungga , Atami M. Ircham , Setiawan Anang , Maulana Fattah , Wafiqni

Identyfikatory

DOI

10.2478/fas-2024-0006

• Języki publikacji: EN

Abstrakty

EN

The lower wing section of an aircraft is considered particularly vulnerable to fatigue failure due to the presence of inspection holes, which create stress concentrations and increase local stress in the surrounding material. This study estimates the fatigue life of the lower wing structure, including rivet holes around the inspection openings, in a new-generation Indonesian short take-off and landing (STOL) aircraft under cyclic flight loads. Fatigue assessment was conducted in five stages: (1) development of a 3D design model of the lower wing skin; (2) stress analysis of the skin without rivet holes, using finite element analysis (FEA), to identify critical areas around the inspection hole; (3) stress analysis of the skin with rivet holes in these critical areas; (4) compilation of a stress spectrum from flight test data; and (5) fatigue life estimation using the cumulative damage method with the application of a scatter factor. The analysis results indicate a maximum fatigue life of 67,750 flight cycles for rivet holes in the lower wing skin, exceeding the industry target of 30,000 cycles. However, when a scatter factor is applied, the maximum fatigue life is reduced to 13,550 flight cycles, establishing the required inspection threshold for the STOL aircraft.

Słowa kluczowe

EN

Palmgren-Miner rule; fatigue life; cumulative damage; load spectrum; MSC. Patran/Nastran; center wing box

• Wydawca: Wydawnictwa Naukowe Sieci Badawczej Łukasiewicz - Instytutu Lotnictwa
• Czasopismo: Fatigue of Aircraft Structures
• Rocznik: 2024
• Tom: Iss.16
• Strony: 75--88
• Opis fizyczny: Bibliogr. 16 poz., rys., tab., wykr., wzory

Twórcy

autor

Dewa Rando Tungga

• Department of Mechanical Engineering, Republic of Indonesia Defense University, IPSC Area, Bogor 16810, Indonesia

• https://orcid.org/0000-0002-1006-1224

autor

Atami M. Ircham

• Department of Mechanical Engineering, Republic of Indonesia Defense University, IPSC Area, Bogor 16810, Indonesia

autor

Setiawan Anang

• Department of Mechanical Engineering, Republic of Indonesia Defense University, IPSC Area, Bogor 16810, Indonesia

• https://orcid.org/0009-0006-4742-0223

autor

Maulana Fattah

• Department of Mechanical Engineering, Republic of Indonesia Defense University, IPSC Area, Bogor 16810, Indonesia

• https://orcid.org/0000-0003-1092-6221

autor

Wafiqni

• Division of Design and Structural Analysis, Indonesian Aerospace, Bandung 40174, Indonesia

Bibliografia

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Uwagi

This research was carried out in the Indonesian Aerospace and as a part of research collaboration with the Republic of Indonesia Defense University under Ministry of Defense partnership program.