The fatigue failure study of repaired aluminum plates by composite patches using Acoustic Emission

被引：32
作者：
Maleki, Abdullah [1 ]
Saeedifar, Milad [1 ,2 ]
Najafabadi, Mehdi Ahmadi [1 ]
Zarouchas, Dimitrios [2 ]
机构：
[1] Amirkabir Univ Technol, Nondestruct Testing Lab, Dept Mech Engn, 424 Hafez Ave, Tehran 15914, Iran
[2] Delft Univ Technol, Struct Integr & Composites Grp, Fac Aerosp Engn, Delft, Netherlands
来源：
ENGINEERING FRACTURE MECHANICS | 2019年 / 210卷 / 300-311期
关键词：
Repaired cracked-aluminum; Composite patch; Acoustic Emission; Fatigue; Fractography; CRACK GROWTH-BEHAVIOR; PREDICTION; PROPAGATION; JOINTS; LIFE;
D O I：
10.1016/j.engfracmech.2017.12.034
中图分类号：
O3 [力学];
学科分类号：
08 ; 0801 ;
摘要：
The aim of this study is to investigate the failure of cracked aluminum plates repaired by one-side composite patches under fatigue loading using Acoustic Emission (AE) and fractography images. Rectangular specimens made of 6061 aluminum alloy with central through thickness pre-cracks were repaired using glass/epoxy laminated patches. The specimens were subjected to the fatigue loading and AE technique was employed to monitor the effect of the repair patch on the damage progression. First, different stages of damage evolution were studied based on the mechanical data and fractography images. Then, the AE energy utilized to characterize failure process of the specimens. To this aim, AE signals of the aluminum cracking and adhesive layer failure were discriminated according to their energy content. The effect of patch thickness and layup on the failure behavior of the specimens were also studied. Finally, it is concluded that AE is a powerful technique to characterize the failure process of a repaired cracked aeronautic structure by composite patches. (C) 2017 Elsevier Ltd. All rights reserved.
引用
收藏
页码：300 / 311
页数：12
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