Abstract

The present study aims to optimise the material parameters of the 2xxx series aluminium alloy used in aircraft wing leading edges to improve its mechanical properties against bird impact. For this study, a bird model is established and validated with an experiment test from literature and with a bird strike test on the wing leading edge. The significant material parameters which affect the energy absorption characteristics of the wing leading edge is selected from the comparison of parametric study results. Then the selected parameters are optimised and validated with bird impact analysis studies based on Taguchi’s L16 factorial design of experiments combined with grey relational analysis. The significant improvement in the mechanical properties, i.e. yield strength, ultimate tensile strength, and tensile toughness of the new optimised aluminium alloy has been proved with a series of uniaxial tension tests. The new alloy shows average property improvement up to 24.44% in tensile toughness and 19.4% in tensile strength than baseline alloy AA 2024-T3.

摘要

本研究旨在优化用于飞机机翼前缘的 2xxx 系列铝合金的材料参数，以提高其抗鸟撞的机械性能。在本研究中，通过文献中的实验测试和机翼前缘的鸟击测试建立并验证了鸟类模型。从参数研究结果的比较中选择了影响机翼前缘能量吸收特性的重要材料参数。然后通过基于田口的L16因子试验设计结合灰色关联分析的鸟类影响分析研究对所选参数进行优化和验证。力学性能显着提高，即屈服强度、极限抗拉强度、经一系列单轴拉伸试验证明了新优化铝合金的抗拉韧性和抗拉韧性。与基准合金 AA 2024-T3 相比，这种新合金的拉伸韧性平均性能提高了 24.44%，拉伸强度提高了 19.4%。