Details
| Original language | English |
|---|---|
| Article number | 108104 |
| Number of pages | 11 |
| Journal | International journal of fatigue |
| Volume | 180 |
| Early online date | 12 Dec 2023 |
| Publication status | Published - Mar 2024 |
Abstract
Vast aging metallic structures are suffering from fatigue cracking, jeopardizing structural integrity and personnel safety. Therefore it is of great benefit to develop strengthening solutions to achieve complete fatigue crack arrest. A bonded and prestressed fatigue strengthening solution on the basis of an iron-based shape memory alloy (Fe-SMA) shows great potential in this term. An experimental campaign has been carried out in this paper to achieve complete fatigue crack arrest in metallic plates. Several activation methods greatly affecting the prestressing level have been experimentally tested, it has been found that the gas torch activation is the most effective method, extending the fatigue crack growth life by 6.9 times. The experimental campaign has demonstrated that prestressing forces required to achieve complete fatigue crack arrest capability could be realized by increasing the Fe-SMA patch width combined with the most effective activation method. In addition, the results show that the length of the Fe-SMA repair together with the activation length can be reduced without sacrificing the repair efficiency. The findings of this paper are greatly beneficial for industrial sectors suffering from fatigue cracking in metallic structures, small bonded Fe-SMA patches can be easily activated to achieve complete fatigue crack arrest capability.
Keywords
- Adhesive bonding, Fatigue crack arrest, Fatigue crack retardation, Fe-SMA, Self-prestressing
ASJC Scopus subject areas
- Mathematics(all)
- Modelling and Simulation
- Materials Science(all)
- Engineering(all)
- Mechanics of Materials
- Engineering(all)
- Mechanical Engineering
- Engineering(all)
- Industrial and Manufacturing Engineering
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In: International journal of fatigue, Vol. 180, 108104, 03.2024.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Complete fatigue crack arrest in metallic structures using bonded prestressed iron-based shape memory alloy repairs
AU - Wang, Wandong
AU - Zhou, Wei
AU - Ma, Yu'e
AU - Motavalli, Masoud
AU - Ghafoori, Elyas
N1 - Funding Information: This research was supported by Innosuisse-Swiss Innovation Agency, Switzerland and refer AG with the project number 30060.1 IP-ENG. Dr. Julien Michels has supported the research with in-sightful discussions. The authors would like to thank the technicians of the Empa Structural Engineering Lab for their assistance in performing the experiments. The funding from National Natural Science Foundation of China with the project number 52202509 is also acknowledged for supporting the summarizing and analyzing results of this project.
PY - 2024/3
Y1 - 2024/3
N2 - Vast aging metallic structures are suffering from fatigue cracking, jeopardizing structural integrity and personnel safety. Therefore it is of great benefit to develop strengthening solutions to achieve complete fatigue crack arrest. A bonded and prestressed fatigue strengthening solution on the basis of an iron-based shape memory alloy (Fe-SMA) shows great potential in this term. An experimental campaign has been carried out in this paper to achieve complete fatigue crack arrest in metallic plates. Several activation methods greatly affecting the prestressing level have been experimentally tested, it has been found that the gas torch activation is the most effective method, extending the fatigue crack growth life by 6.9 times. The experimental campaign has demonstrated that prestressing forces required to achieve complete fatigue crack arrest capability could be realized by increasing the Fe-SMA patch width combined with the most effective activation method. In addition, the results show that the length of the Fe-SMA repair together with the activation length can be reduced without sacrificing the repair efficiency. The findings of this paper are greatly beneficial for industrial sectors suffering from fatigue cracking in metallic structures, small bonded Fe-SMA patches can be easily activated to achieve complete fatigue crack arrest capability.
AB - Vast aging metallic structures are suffering from fatigue cracking, jeopardizing structural integrity and personnel safety. Therefore it is of great benefit to develop strengthening solutions to achieve complete fatigue crack arrest. A bonded and prestressed fatigue strengthening solution on the basis of an iron-based shape memory alloy (Fe-SMA) shows great potential in this term. An experimental campaign has been carried out in this paper to achieve complete fatigue crack arrest in metallic plates. Several activation methods greatly affecting the prestressing level have been experimentally tested, it has been found that the gas torch activation is the most effective method, extending the fatigue crack growth life by 6.9 times. The experimental campaign has demonstrated that prestressing forces required to achieve complete fatigue crack arrest capability could be realized by increasing the Fe-SMA patch width combined with the most effective activation method. In addition, the results show that the length of the Fe-SMA repair together with the activation length can be reduced without sacrificing the repair efficiency. The findings of this paper are greatly beneficial for industrial sectors suffering from fatigue cracking in metallic structures, small bonded Fe-SMA patches can be easily activated to achieve complete fatigue crack arrest capability.
KW - Adhesive bonding
KW - Fatigue crack arrest
KW - Fatigue crack retardation
KW - Fe-SMA
KW - Self-prestressing
UR - http://www.scopus.com/inward/record.url?scp=85180494788&partnerID=8YFLogxK
U2 - 10.1016/j.ijfatigue.2023.108104
DO - 10.1016/j.ijfatigue.2023.108104
M3 - Article
AN - SCOPUS:85180494788
VL - 180
JO - International journal of fatigue
JF - International journal of fatigue
SN - 0142-1123
M1 - 108104
ER -