Fatigue life prediction of aluminum-lithium alloy considering impact effects

Lei Li; Qiangbin Shi; Xuan Wang

doi:10.1117/12.3007210

25 October 2023 Fatigue life prediction of aluminum-lithium alloy considering impact effects

Lei Li, Qiangbin Shi, Xuan Wang

Proceedings Volume 12801, Ninth International Conference on Mechanical Engineering, Materials, and Automation Technology (MMEAT 2023); 128010J (2023) https://doi.org/10.1117/12.3007210
Event: Ninth International Conference on Mechanical Engineering, Materials, and Automation Technology (MMEAT 2023), 2023, Dalian, China

Abstract

The C919 aircraft reflects the combination of maturity and advanced in the selection of structural materials, and adopts a large number of third-generation aluminum-lithium alloy materials marked by 2060, which has the advantages of high specific stiffness and high specific strength. During aircraft operation, low-energy impactors such as hail and gravel can hit the surface of the aircraft, forming minor pit defects at the skin and forming local stress concentrations, thereby significantly reducing the fatigue life of the aircraft structure. In this paper, the 2mm thick 2060 aluminum-lithium alloy skin is used as the research object, the impact test is carried out first, and the fatigue test is carried out after the impact is completed, and the finite element model is established in the ABAQUS software to simulate the impact, and the nominal stress and stress concentration factor of the dangerous part are clarified, and the fatigue life prediction is carried out by the nominal stress method, and compared with the fatigue test results, the results show that the life prediction by the nominal stress method can provide a reference for the regular maintenance of the aircraft.

(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Lei Li, Qiangbin Shi, and Xuan Wang "Fatigue life prediction of aluminum-lithium alloy considering impact effects", Proc. SPIE 12801, Ninth International Conference on Mechanical Engineering, Materials, and Automation Technology (MMEAT 2023), 128010J (25 October 2023); https://doi.org/10.1117/12.3007210

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