Details
| Original language | English |
|---|---|
| Article number | 108301 |
| Number of pages | 11 |
| Journal | International journal of fatigue |
| Volume | 184 |
| Early online date | 26 Mar 2024 |
| Publication status | Published - Jul 2024 |
Abstract
A bonded and prestressed retarder concept is proposed in this work. The shape memory effect of an iron-based shape memory alloy (Fe-SMA) has been exploited to realize a desirable self-prestressing mechanism, resulting in compressive stresses in the parent structure. The synergistic prestressing and added fail-safe features of bonded and prestressed Fe-SMA retarders desirably restrain the fatigue crack growth. The fatigue crack growth behaviour in metallic plates reinforced with bonded and prestressed retarders is experimentally studied in this work. A test campaign has been implemented to investigate the effects of prestressing, as well as the influence of the relative location between the Fe-SMA retarders and the initial crack tip on the crack growth behaviour and fatigue crack life extension. The experimental results show that the prestressing of retarders desirably extends the fatigue crack growth life. More extension in fatigue life can be achieved by positioning the bonded prestressed retarders from 40 to 20 mm before the initial crack tip, the desirable retardation due to beneficial compressive prestressing and added load path on the small crack is significant. The findings in this work imply that it is beneficial to proactively reinforce the fatigue-prone locations in metallic structures with bonded and prestressed Fe-SMA retarders in order to extend the service life.
Keywords
- Adhesive bonding, Fatigue crack retardation, Fatigue life extension, Prestressed retarders, 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. 184, 108301, 07.2024.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Bonded and prestressed fatigue crack retarders based on Fe-SMA
AU - Wang, Wandong
AU - Guo, Xinlu
AU - Zhou, Wei
AU - Ma, Yu'e
AU - Motavalli, Masoud
AU - Ghafoori, Elyas
N1 - Funding Information: The financial funding from Innosuisse-Swiss Innovation Agency and re-fer AG with the project number 30060.1 IP-ENG is acknowledged. The authors would like to thank the technicians of the Empa Structural Engineering Lab for their assistance in performing the experiments. National Natural Science Foundation of China also supported the continuation of this project with the project number 52202509, which is sincerely acknowledged.
PY - 2024/7
Y1 - 2024/7
N2 - A bonded and prestressed retarder concept is proposed in this work. The shape memory effect of an iron-based shape memory alloy (Fe-SMA) has been exploited to realize a desirable self-prestressing mechanism, resulting in compressive stresses in the parent structure. The synergistic prestressing and added fail-safe features of bonded and prestressed Fe-SMA retarders desirably restrain the fatigue crack growth. The fatigue crack growth behaviour in metallic plates reinforced with bonded and prestressed retarders is experimentally studied in this work. A test campaign has been implemented to investigate the effects of prestressing, as well as the influence of the relative location between the Fe-SMA retarders and the initial crack tip on the crack growth behaviour and fatigue crack life extension. The experimental results show that the prestressing of retarders desirably extends the fatigue crack growth life. More extension in fatigue life can be achieved by positioning the bonded prestressed retarders from 40 to 20 mm before the initial crack tip, the desirable retardation due to beneficial compressive prestressing and added load path on the small crack is significant. The findings in this work imply that it is beneficial to proactively reinforce the fatigue-prone locations in metallic structures with bonded and prestressed Fe-SMA retarders in order to extend the service life.
AB - A bonded and prestressed retarder concept is proposed in this work. The shape memory effect of an iron-based shape memory alloy (Fe-SMA) has been exploited to realize a desirable self-prestressing mechanism, resulting in compressive stresses in the parent structure. The synergistic prestressing and added fail-safe features of bonded and prestressed Fe-SMA retarders desirably restrain the fatigue crack growth. The fatigue crack growth behaviour in metallic plates reinforced with bonded and prestressed retarders is experimentally studied in this work. A test campaign has been implemented to investigate the effects of prestressing, as well as the influence of the relative location between the Fe-SMA retarders and the initial crack tip on the crack growth behaviour and fatigue crack life extension. The experimental results show that the prestressing of retarders desirably extends the fatigue crack growth life. More extension in fatigue life can be achieved by positioning the bonded prestressed retarders from 40 to 20 mm before the initial crack tip, the desirable retardation due to beneficial compressive prestressing and added load path on the small crack is significant. The findings in this work imply that it is beneficial to proactively reinforce the fatigue-prone locations in metallic structures with bonded and prestressed Fe-SMA retarders in order to extend the service life.
KW - Adhesive bonding
KW - Fatigue crack retardation
KW - Fatigue life extension
KW - Prestressed retarders
KW - Self-prestressing
UR - http://www.scopus.com/inward/record.url?scp=85189031393&partnerID=8YFLogxK
U2 - 10.1016/j.ijfatigue.2024.108301
DO - 10.1016/j.ijfatigue.2024.108301
M3 - Article
AN - SCOPUS:85189031393
VL - 184
JO - International journal of fatigue
JF - International journal of fatigue
SN - 0142-1123
M1 - 108301
ER -