Volume 39, Number 1, February 2021
|Page(s)||1 - 8|
|Published online||09 April 2021|
Structure design and reliability analysis of Al-Ti lugs
School of Aeronautics, Northwestern Polytechnical University, Xi'an 710072, China
Aircraft lug joint is the key part of load transfer. In order to improve the safety of lug joint, on the premise of meeting the design requirements of static strength and fatigue, the composite connection lug structure design technology of different metal materials is proposed in this paper. Firstly, the damage safety design and life reliability analysis of the lug structure are studied theoretically. Secondly, based on the concept of damage safety design and the design principle of deformation coordination, the design method of composite connection lug with deformation coordination is proposed, and the thickness ratio of single ear is 0.8:1:0.8. Finally, the reliability of the composite lug is analyzed. The results show that the structural design scheme of aluminum-titanium composite ear piece can meet the requirements of static strength and damage tolerance, and compared with the conventional ear structure, the failure probability of structure mission life is greatly reduced when the weight of the composite connection lug is only increased by 4.9%. The proposed method can effectively guide the structural design of composite ear piece.
Key words: composite connection lug / damage safety design / deformation coordination / life reliability analysis / structural design / damage tolerance
关键字 : 复合耳片 / 破损安全设计 / 变形协调 / 可靠性分析 / 结构设计
© 2021 Journal of Northwestern Polytechnical University. All rights reserved.
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