Details
| Original language | English |
|---|---|
| Article number | 105397 |
| Journal | Engineering failure analysis |
| Volume | 127 |
| Publication status | Published - Sept 2021 |
| Externally published | Yes |
Abstract
Previous studies have demonstrated the effectiveness of strengthening with pre-stressed carbon-fiber reinforced polymer (CFRP) composites to increase the lifetime of cracked steel members. In some cases, complete crack arrest has been observed. This study aims to present a method that can estimate the minimum required prestressing that would result in a complete crack arrest in steel I-beams. Analytical and numerical models based on linear elastic fracture mechanics (LEFM) were developed and verified using a set of experimental results. Three steel I-beams with different crack lengths were strengthened with pre-stressed CFRP composites and later tested under a high-cycle fatigue loading regime. It was shown that the pre-stressed CFRP composites could result in a crack closure mechanism, in which the crack surfaces remained closed even under large external loads. Furthermore, it was shown that by considering the stiffness of the CFRP in the analytical formulation, the amount of prestressing required to arrest the fatigue crack growth can be reduced.
Keywords
- Carbon-fiber reinforced polymer (CFRP), Fatigue crack, Fracture, Metallic structures, Pre-stressing
ASJC Scopus subject areas
- Materials Science(all)
- General Materials Science
- Engineering(all)
- General Engineering
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In: Engineering failure analysis, Vol. 127, 105397, 09.2021.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Fatigue crack arrest in steel beams using FRP composites
AU - Hosseini, Seyed Mahdi
AU - Melchior, Jakob
AU - Izadi, Mohammadreza
AU - Ghafoori, Elyas
N1 - Publisher Copyright: © 2021 The Authors
PY - 2021/9
Y1 - 2021/9
N2 - Previous studies have demonstrated the effectiveness of strengthening with pre-stressed carbon-fiber reinforced polymer (CFRP) composites to increase the lifetime of cracked steel members. In some cases, complete crack arrest has been observed. This study aims to present a method that can estimate the minimum required prestressing that would result in a complete crack arrest in steel I-beams. Analytical and numerical models based on linear elastic fracture mechanics (LEFM) were developed and verified using a set of experimental results. Three steel I-beams with different crack lengths were strengthened with pre-stressed CFRP composites and later tested under a high-cycle fatigue loading regime. It was shown that the pre-stressed CFRP composites could result in a crack closure mechanism, in which the crack surfaces remained closed even under large external loads. Furthermore, it was shown that by considering the stiffness of the CFRP in the analytical formulation, the amount of prestressing required to arrest the fatigue crack growth can be reduced.
AB - Previous studies have demonstrated the effectiveness of strengthening with pre-stressed carbon-fiber reinforced polymer (CFRP) composites to increase the lifetime of cracked steel members. In some cases, complete crack arrest has been observed. This study aims to present a method that can estimate the minimum required prestressing that would result in a complete crack arrest in steel I-beams. Analytical and numerical models based on linear elastic fracture mechanics (LEFM) were developed and verified using a set of experimental results. Three steel I-beams with different crack lengths were strengthened with pre-stressed CFRP composites and later tested under a high-cycle fatigue loading regime. It was shown that the pre-stressed CFRP composites could result in a crack closure mechanism, in which the crack surfaces remained closed even under large external loads. Furthermore, it was shown that by considering the stiffness of the CFRP in the analytical formulation, the amount of prestressing required to arrest the fatigue crack growth can be reduced.
KW - Carbon-fiber reinforced polymer (CFRP)
KW - Fatigue crack
KW - Fracture
KW - Metallic structures
KW - Pre-stressing
UR - http://www.scopus.com/inward/record.url?scp=85107971150&partnerID=8YFLogxK
U2 - 10.1016/j.engfailanal.2021.105397
DO - 10.1016/j.engfailanal.2021.105397
M3 - Article
AN - SCOPUS:85107971150
VL - 127
JO - Engineering failure analysis
JF - Engineering failure analysis
SN - 1350-6307
M1 - 105397
ER -