英文论文


文献类型
Journal article (JA)
题名
A method for improving the crack resistance of aluminum alloy aircraft skin inspired by plant leaf
作者
Wu, Lushen; Wang, Teng; Hu, Yun; Liu, Jiaming; Song, Minjie
作者单位
[Wu, Lushen; Wang, Teng; Hu, Yun; Liu, Jiaming; Song, Minjie] Nanchang Univ, Sch Mechatron Engn, Nanchang 330031, Jiangxi, Peoples R China. [Wang, Teng] Xiamen Univ, Sch Aerosp Engn, Xiamen 361102, Peoples R China. [Hu, Yun] Imperial Coll London, Dept Mech Engn, London SW7 2AZ, England.
通讯作者地址
Nanchang Univ, Sch Mechatron Engn, Nanchang 330031, Jiangxi, Peoples R China.
Email
hyfatigue@163.com
ResearchID
ORCID
期刊名称
Theoretical and Applied Fracture Mechanics
出版社
Elsevier B.V.
ISSN
0167-8442
出版信息
2020-04, 106 ():-.
JCR
3
影响因子
4.017
ISBN
基金
National Natural Science Foundation of China, ChinaNational Natural Science Foundation of China (NSFC) [51705229]; China Scholarship Council, ChinaChina Scholarship Council
会议名称
会议地点
会议开始日期
会议结束日期
关键词
Aircraft; Aluminum alloys; Biomimetics; Crack propagation; Crack tips; Edge detection; Fractals; Residual stresses; Stress intensity factors
摘要
Aircraft skins are likely to experience cracks and fracture failure due to the combined action of shear, bending, and torsional load. Inspired by the crack resistance exhibited by plant leaf, a method is proposed to improve the crack resistance of aluminum alloy aircraft skin. The characteristic parameters of main and secondary leaf veins are extracted by image edge detection and analysis methods. According to a constructed collection of self-similar fractal sets, a bio-inspired residual stress field with fractal characteristics extracted from leaf veins is applied to specimens ahead of crack tip by using laser peening. The effects of fractal parameters on crack retardation are analyzed using interaction integral. The results show that the stress intensity factor ahead of crack tip is reduced by applying a bio-inspired residual stress field, whereas the plastic zone area ahead of crack tip is enlarged. The correlation between these two trends reveals the mechanism of stress intensity decrease after the introduction of bio-inspired residual stress field. The optimal crack retardation effect is achieved at a fractal angle of 55 degrees, at which the residual fatigue life is increased by up to 203.0%. Compared with square-shaped laser peening, full-coverage laser peening, square criss-cross pattern method, and single-edge notched tensile (SENT) specimen repair method, the proposed method achieves the longest residual fatigue life, which is almost three times that of the square-shaped laser peening method. Therefore, this theoretical study presents a potential method for improving the crack resistance of aluminum alloy aircraft skin.
一级学科
Engineering, Mechanical; Mechanics
WOS入藏号
WOS:000519657500009
EI收录号
20195307950035
DOI
10.1016/j.tafmec.2019.102444
ESI
ENGINEERING
收录于
SCIE, EI

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