Details
| Originalsprache | Englisch |
|---|---|
| Titel des Sammelwerks | 9th International Conference on Fibre-Reinforced Polymer (FRP) Composites in Civil Engineering, CICE 2018 |
| Herausgeber/-innen | Emmanuel Ferrier, Karim Benzarti, Jean-Francois Caron |
| Seiten | 367-374 |
| Seitenumfang | 8 |
| ISBN (elektronisch) | 9780000000002 |
| Publikationsstatus | Veröffentlicht - 2018 |
| Extern publiziert | Ja |
| Veranstaltung | 9th International Conference on Fibre-Reinforced Polymer (FRP) Composites in Civil Engineering, CICE 2018 - Paris, Frankreich Dauer: 17 Juli 2018 → 19 Juli 2018 |
Publikationsreihe
| Name | 9th International Conference on Fibre-Reinforced Polymer (FRP) Composites in Civil Engineering, CICE 2018 |
|---|---|
| Band | 2018-July |
Abstract
This paper aims to show the feasibility of application of iron-based shape memory alloy (Fe-SMA) for fatigue strengthening of steel plates. The effectiveness of the proposed retrofit system was also compared with that of prestressed carbon-fiber reinforced polymer (CFRP) system. The Fe-SMAs are smart materials that can be self-prestressed via using their so-called shape memory effect (SME) characteristics. In this study, the Fe-SMA strips are anchored on the steel plates using a mechanical anchorage system. The SME in the Fe-SMAs is activated when the material is heated up to a characteristic temperature. Two precracked steel plates with different Fe-SMA strengthening schemes were prepared. Additionally, a precracked steel plate without strengthening served as a reference specimen. Fatigue tests were then performed on the SMA-strengthened steel plates. All specimens were subjected to fatigue loading with a stress range of 75 MPa and a load ratio of 0.2. It was observed that the fatigue life of the steel plates enhanced substantially by using the Fe-SMA strips. The activated (i.e., prestressed) Fe-SMA strips apply a compressive stress to the critical cracked detail in the steel plate, which decreases the tension stress at the crack tip and resulting in an increased fatigue life of the steel plates. The results of the tests were compared with the existing tests results on CFRP strengthening of steel plates.
ASJC Scopus Sachgebiete
- Ingenieurwesen (insg.)
- Tief- und Ingenieurbau
- Werkstoffwissenschaften (insg.)
- Polymere und Kunststoffe
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9th International Conference on Fibre-Reinforced Polymer (FRP) Composites in Civil Engineering, CICE 2018. Hrsg. / Emmanuel Ferrier; Karim Benzarti; Jean-Francois Caron. 2018. S. 367-374 (9th International Conference on Fibre-Reinforced Polymer (FRP) Composites in Civil Engineering, CICE 2018; Band 2018-July).
Publikation: Beitrag in Buch/Bericht/Sammelwerk/Konferenzband › Aufsatz in Konferenzband › Forschung › Peer-Review
}
TY - GEN
T1 - Shape memory alloy (SMA) strips for fatigue strengthening of cracked steel plates
AU - Izadi, M. R.
AU - Ghafoori, E.
AU - Motavalli, M.
AU - Maalek, S.
AU - Hosseini, A.
N1 - Funding Information: The first author would like to appreciate the Swiss Federal Commission for Scholarships for Foreign Students (FCS) to provide a Swiss Government Excellence Scholarship to support this project. Thanks also go to the technicians of the Structural Engineering Research Laboratory and Mechanical Systems Engineering Laboratory of Empa for their exceptional cooperation in performing the experiments. Furthermore, the support from the company re-fer AG, Switzerland and Von Roll Deutschland GmbH to provide the Fe-SMA strips and GFRP laminates, respectively, is acknowledged. Publisher Copyright: © INTER-NOISE 2019 MADRID - 48th International Congress and Exhibition on Noise Control Engineering. All rights reserved.
PY - 2018
Y1 - 2018
N2 - This paper aims to show the feasibility of application of iron-based shape memory alloy (Fe-SMA) for fatigue strengthening of steel plates. The effectiveness of the proposed retrofit system was also compared with that of prestressed carbon-fiber reinforced polymer (CFRP) system. The Fe-SMAs are smart materials that can be self-prestressed via using their so-called shape memory effect (SME) characteristics. In this study, the Fe-SMA strips are anchored on the steel plates using a mechanical anchorage system. The SME in the Fe-SMAs is activated when the material is heated up to a characteristic temperature. Two precracked steel plates with different Fe-SMA strengthening schemes were prepared. Additionally, a precracked steel plate without strengthening served as a reference specimen. Fatigue tests were then performed on the SMA-strengthened steel plates. All specimens were subjected to fatigue loading with a stress range of 75 MPa and a load ratio of 0.2. It was observed that the fatigue life of the steel plates enhanced substantially by using the Fe-SMA strips. The activated (i.e., prestressed) Fe-SMA strips apply a compressive stress to the critical cracked detail in the steel plate, which decreases the tension stress at the crack tip and resulting in an increased fatigue life of the steel plates. The results of the tests were compared with the existing tests results on CFRP strengthening of steel plates.
AB - This paper aims to show the feasibility of application of iron-based shape memory alloy (Fe-SMA) for fatigue strengthening of steel plates. The effectiveness of the proposed retrofit system was also compared with that of prestressed carbon-fiber reinforced polymer (CFRP) system. The Fe-SMAs are smart materials that can be self-prestressed via using their so-called shape memory effect (SME) characteristics. In this study, the Fe-SMA strips are anchored on the steel plates using a mechanical anchorage system. The SME in the Fe-SMAs is activated when the material is heated up to a characteristic temperature. Two precracked steel plates with different Fe-SMA strengthening schemes were prepared. Additionally, a precracked steel plate without strengthening served as a reference specimen. Fatigue tests were then performed on the SMA-strengthened steel plates. All specimens were subjected to fatigue loading with a stress range of 75 MPa and a load ratio of 0.2. It was observed that the fatigue life of the steel plates enhanced substantially by using the Fe-SMA strips. The activated (i.e., prestressed) Fe-SMA strips apply a compressive stress to the critical cracked detail in the steel plate, which decreases the tension stress at the crack tip and resulting in an increased fatigue life of the steel plates. The results of the tests were compared with the existing tests results on CFRP strengthening of steel plates.
KW - Fatigue
KW - Iron-based shape memory alloy (Fe-SMA)
KW - Prestressing
KW - Shape memory effect (SME)
KW - Steel strengthening
UR - http://www.scopus.com/inward/record.url?scp=85077582063&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:85077582063
T3 - 9th International Conference on Fibre-Reinforced Polymer (FRP) Composites in Civil Engineering, CICE 2018
SP - 367
EP - 374
BT - 9th International Conference on Fibre-Reinforced Polymer (FRP) Composites in Civil Engineering, CICE 2018
A2 - Ferrier, Emmanuel
A2 - Benzarti, Karim
A2 - Caron, Jean-Francois
T2 - 9th International Conference on Fibre-Reinforced Polymer (FRP) Composites in Civil Engineering, CICE 2018
Y2 - 17 July 2018 through 19 July 2018
ER -