Details
| Originalsprache | Englisch |
|---|---|
| Seiten (von - bis) | 1192-1199 |
| Seitenumfang | 8 |
| Fachzeitschrift | Procedia Structural Integrity |
| Jahrgang | 64 |
| Frühes Online-Datum | 8 Nov. 2024 |
| Publikationsstatus | Veröffentlicht - 2024 |
| Veranstaltung | 7th International Conference on Smart Monitoring, Assessment and Rehabilitation of Civil Structures, SMAR 2024 - Salerno, Italien Dauer: 8 März 2023 → 11 März 2023 |
Abstract
Wire and arc additive manufacturing (WAAM) is a versatile technology with applications ranging from manufacturing to the strengthening and repair of aging components. This paper investigates the effectiveness of strengthening techniques using WAAM through both numerical simulations and experimental observations. A thermo-mechanical analysis is employed to predict the temperature and stress fields in repaired specimens. The results show that original cracks in the plate are arrested due to compressive residual stresses generated at the crack tip due to the WAAM process, as well as the increased stiffness around the cracked region. However, new cracks initiate at the edge of the plate/WAAM-material interface which corresponds to the high-stress state in the region. This issue is mitigated significantly by machining the WAAM sample into a pyramid shape, resulting in infinite life for the strengthened plate under fatigue loading. Fractography analysis aids in better understanding the mechanism of sample failure. In conclusion, the results underscore the potential of WAAM repair, offering a hopeful outlook for the future of steel structure maintenance by presenting it as a promising method for mitigating fatigue-induced damage in steel structures.
ASJC Scopus Sachgebiete
- Ingenieurwesen (insg.)
- Tief- und Ingenieurbau
- Werkstoffwissenschaften (insg.)
- Allgemeine Materialwissenschaften
- Ingenieurwesen (insg.)
- Werkstoffmechanik
- Ingenieurwesen (insg.)
- Maschinenbau
Ziele für nachhaltige Entwicklung
Zitieren
- Standard
- Harvard
- Apa
- Vancouver
- BibTex
- RIS
in: Procedia Structural Integrity, Jahrgang 64, 2024, S. 1192-1199.
Publikation: Beitrag in Fachzeitschrift › Konferenzaufsatz in Fachzeitschrift › Forschung › Peer-Review
}
TY - JOUR
T1 - Numerical and Experimental Study on Steel Members Retrofitted by Directed Energy Deposition
AU - Dahaghin, Hamid
AU - Moshayedi, Hessam
AU - Pichler, Niels
AU - Li, Lingzhen
AU - Mohri, Maryam
AU - Diao, Chenglei
AU - Motavalli, Masoud
AU - Zahrai, Seyed Mehdi
AU - Ghafoori, Elyas
N1 - Publisher Copyright: © 2024 Elsevier B.V.. All rights reserved.
PY - 2024
Y1 - 2024
N2 - Wire and arc additive manufacturing (WAAM) is a versatile technology with applications ranging from manufacturing to the strengthening and repair of aging components. This paper investigates the effectiveness of strengthening techniques using WAAM through both numerical simulations and experimental observations. A thermo-mechanical analysis is employed to predict the temperature and stress fields in repaired specimens. The results show that original cracks in the plate are arrested due to compressive residual stresses generated at the crack tip due to the WAAM process, as well as the increased stiffness around the cracked region. However, new cracks initiate at the edge of the plate/WAAM-material interface which corresponds to the high-stress state in the region. This issue is mitigated significantly by machining the WAAM sample into a pyramid shape, resulting in infinite life for the strengthened plate under fatigue loading. Fractography analysis aids in better understanding the mechanism of sample failure. In conclusion, the results underscore the potential of WAAM repair, offering a hopeful outlook for the future of steel structure maintenance by presenting it as a promising method for mitigating fatigue-induced damage in steel structures.
AB - Wire and arc additive manufacturing (WAAM) is a versatile technology with applications ranging from manufacturing to the strengthening and repair of aging components. This paper investigates the effectiveness of strengthening techniques using WAAM through both numerical simulations and experimental observations. A thermo-mechanical analysis is employed to predict the temperature and stress fields in repaired specimens. The results show that original cracks in the plate are arrested due to compressive residual stresses generated at the crack tip due to the WAAM process, as well as the increased stiffness around the cracked region. However, new cracks initiate at the edge of the plate/WAAM-material interface which corresponds to the high-stress state in the region. This issue is mitigated significantly by machining the WAAM sample into a pyramid shape, resulting in infinite life for the strengthened plate under fatigue loading. Fractography analysis aids in better understanding the mechanism of sample failure. In conclusion, the results underscore the potential of WAAM repair, offering a hopeful outlook for the future of steel structure maintenance by presenting it as a promising method for mitigating fatigue-induced damage in steel structures.
KW - Crack arrest
KW - Fatigue life extension
KW - Fatigue repair
KW - Metal 3D-printing
KW - Thermo-mechanical analysis
UR - http://www.scopus.com/inward/record.url?scp=85217713997&partnerID=8YFLogxK
U2 - 10.1016/j.prostr.2024.09.166
DO - 10.1016/j.prostr.2024.09.166
M3 - Conference article
AN - SCOPUS:85217713997
VL - 64
SP - 1192
EP - 1199
JO - Procedia Structural Integrity
JF - Procedia Structural Integrity
SN - 2452-3216
T2 - 7th International Conference on Smart Monitoring, Assessment and Rehabilitation of Civil Structures, SMAR 2024
Y2 - 8 March 2023 through 11 March 2023
ER -