A new conception for enhancement of fatigue life of large number of fastener holes in aircraft structures

被引：22

作者：

Duncheva, G. V. ^{[1
]}

Maximov, J. T. ^{[1
]}

Ganev, N. ^{[2
]}

机构：

[1] Tech Univ Gabrovo, Dept Appl Mech, Gabrovo, Bulgaria

[2] Czech Tech Univ, Dept Solid State Engn, Prague 1, Czech Republic

来源：

FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES | 2017年 / 40卷 / 02期

关键词：

aircraft failures; cold working; fatigue life; finite element analysis; residual stress; SEVERE PLASTIC-DEFORMATION; COLD EXPANSION; TOOL;

D O I：

10.1111/ffe.12483

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

A new conception for increasing fatigue life of large number of fastener holes in aircraft structures is developed. It is accomplished by a new method, called friction stir hole expansion (FSHE). This method not only reduces labour and time consumption, but it also decreases the overall cost for processing a large number of holes in structures made of aerospace grade 2024-T3 aluminium alloy. FSHE combines the advantages of friction stir processing with these of mandrel cold working methods in two ways: a micro effect, expressed in hole surface modification, and a macro effect, expressed by the introduction of beneficial compressive residual macro stresses. The effectiveness of the method has been assessed by fatigue tests. Finite element simulations have been carried out. It has been proven that the greater fatigue life of fastener holes, processed by FSHE, is a consequence of the obtained micro effect.

引用

页码：176 / 189

页数：14

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