Fatigue analysis of aircraft fuel thin-wall welded tube based on DFR method

Jin Zhang; Degang Liu; Nanan Li; Changsheng He

doi:10.1117/12.2634874

25 April 2022 Fatigue analysis of aircraft fuel thin-wall welded tube based on DFR method

Jin Zhang, Degang Liu, Nanan Li, Changsheng He

Proceedings Volume 12244, 2nd International Conference on Mechanical, Electronics, and Electrical and Automation Control (METMS 2022); 122440H (2022) https://doi.org/10.1117/12.2634874
Event: 2nd International Conference on Mechanical, Electronics, and Electrical and Automation Control (METMS 2022), 2022, Guilin, China

Abstract

The welded structure has the characteristics of good connectivity, light weight and easy processing, and is widely used in the manufacture of civil aircraft fuel tubes. However, the structural discontinuity of the welded tube can easily lead to stress concentration, and at the same time, the heat generated during the welding process will reduce the strength properties of the material near the weld, making the welded tube one of the weak links in the fuel tube network system, which affect the performance of the aircraft fuel system reliability. In the early aircraft design process, the fuel tubes were designed and selected based on experience, and there was no effective method for fatigue analysis of welded tubes. In this paper, a fatigue analysis method of aircraft fuel thin-walled welded tube is proposed, the fatigue test piece of fuel thin-walled welded tube was designed, the fatigue test method was formulated, and the test data was analyzed based on the DFR method, and DFR value of typical 6061-T4 aluminum fuel thin-walled welded tube for civil aircraft was obtained. Combined with the finite element analysis example of fuel thin-wall welded tube, the general process of welded tube fatigue strength evaluation is given. This paper provides a reference for the fatigue design and engineering application of aircraft fuel thin-wall welded tubes.

Citation Download Citation

Jin Zhang, Degang Liu, Nanan Li, and Changsheng He "Fatigue analysis of aircraft fuel thin-wall welded tube based on DFR method", Proc. SPIE 12244, 2nd International Conference on Mechanical, Electronics, and Electrical and Automation Control (METMS 2022), 122440H (25 April 2022); https://doi.org/10.1117/12.2634874

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KEYWORDS

Reliability

Aluminum

Analytical research

Finite element methods

Aircraft structures

Manufacturing

Safety

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