Enhancing fatigue performance of damaged metallic structures by bonded CFRP patches considering temperature effects

Lu Ke; Chuanxi Li; Jun He; Qiang Shen; Yongming Liu; Yang Jiao

doi:10.1016/j.matdes.2020.108731

Enhancing fatigue performance of damaged metallic structures by bonded CFRP patches considering temperature effects

Lu Ke, Chuanxi Li, Jun He, Qiang Shen, Yongming Liu, Yang Jiao

Research output: Contribution to journal › Article › peer-review

10 Scopus citations

Abstract

This paper reports an experimental and theoretical investigation on the fatigue performance enhancement of damaged steel structures by bonded carbon fiber reinforced polymer (CFRP) systems considering the temperature effects. First, thermomechanical properties of the epoxy adhesive and CFRPs were examined via dynamic mechanical analysis (DMA) and tensile tests. The appropriate curing procedure for the structural adhesive was obtained. Next, the fatigue behavior of notched steel plates strengthened by bonded CFRPs was investigated at different temperatures. During the fatigue tests, beach marking and back-face strain techniques were used to monitor the fatigue crack growth on steel components and the damage evolution within the bonding interface. The results show that the high-temperature resistance of the epoxy adhesive can be effectively improved by increasing the curing temperature and duration. The properly cured bonded CFRP patches can effectively enhance the fatigue performance of damaged steel structures. However, and the elevated temperatures significantly degrade the fatigue behavior of the CFRP-strengthened steel components.

Original language	English (US)
Article number	108731
Journal	Materials and Design
Volume	192
DOIs	https://doi.org/10.1016/j.matdes.2020.108731
State	Published - Jul 2020

Keywords

Carbon fiber reinforced polymer (CFRP)
Elevated temperature
Epoxy adhesive
Fatigue
Metallic structure
Reinforcement

ASJC Scopus subject areas

Materials Science(all)
Mechanics of Materials
Mechanical Engineering

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10.1016/j.matdes.2020.108731

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@article{90ea114a9bc04ce9a123ecddd374a322,

title = "Enhancing fatigue performance of damaged metallic structures by bonded CFRP patches considering temperature effects",

abstract = "This paper reports an experimental and theoretical investigation on the fatigue performance enhancement of damaged steel structures by bonded carbon fiber reinforced polymer (CFRP) systems considering the temperature effects. First, thermomechanical properties of the epoxy adhesive and CFRPs were examined via dynamic mechanical analysis (DMA) and tensile tests. The appropriate curing procedure for the structural adhesive was obtained. Next, the fatigue behavior of notched steel plates strengthened by bonded CFRPs was investigated at different temperatures. During the fatigue tests, beach marking and back-face strain techniques were used to monitor the fatigue crack growth on steel components and the damage evolution within the bonding interface. The results show that the high-temperature resistance of the epoxy adhesive can be effectively improved by increasing the curing temperature and duration. The properly cured bonded CFRP patches can effectively enhance the fatigue performance of damaged steel structures. However, and the elevated temperatures significantly degrade the fatigue behavior of the CFRP-strengthened steel components.",

keywords = "Carbon fiber reinforced polymer (CFRP), Elevated temperature, Epoxy adhesive, Fatigue, Metallic structure, Reinforcement",

author = "Lu Ke and Chuanxi Li and Jun He and Qiang Shen and Yongming Liu and Yang Jiao",

note = "Funding Information: The authors acknowledge the financial support from the National Natural Science Foundation of China [Grant Nos. 51778069 & 51708047 & 51978081 ], the Horizon 2020-Marie Sk{\l}odowska-Curie Individual Fellowship of European Commission [Grant No. 793787 ], the Natural Science Foundation of Hunan Province [Grant No. 2019JJ50670 ], and the China Scholarship Council [Grant No. 201808430209 ]. Funding Information: The authors acknowledge the financial support from the National Natural Science Foundation of China [Grant Nos. 51778069 & 51708047 & 51978081], the Horizon 2020-Marie Sk?odowska-Curie Individual Fellowship of European Commission [Grant No. 793787], the Natural Science Foundation of Hunan Province [Grant No. 2019JJ50670], and the China Scholarship Council [Grant No. 201808430209]. The raw/processed data required to reproduce these findings cannot be shared at this time due to technical or time limitations. Publisher Copyright: {\textcopyright} 2018 The Authors",

year = "2020",

month = jul,

doi = "10.1016/j.matdes.2020.108731",

language = "English (US)",

volume = "192",

journal = "Materials and Design",

issn = "0264-1275",

publisher = "Elsevier BV",

}

TY - JOUR

T1 - Enhancing fatigue performance of damaged metallic structures by bonded CFRP patches considering temperature effects

AU - Ke, Lu

AU - Li, Chuanxi

AU - He, Jun

AU - Shen, Qiang

AU - Liu, Yongming

AU - Jiao, Yang

N1 - Funding Information: The authors acknowledge the financial support from the National Natural Science Foundation of China [Grant Nos. 51778069 & 51708047 & 51978081 ], the Horizon 2020-Marie Skłodowska-Curie Individual Fellowship of European Commission [Grant No. 793787 ], the Natural Science Foundation of Hunan Province [Grant No. 2019JJ50670 ], and the China Scholarship Council [Grant No. 201808430209 ]. Funding Information: The authors acknowledge the financial support from the National Natural Science Foundation of China [Grant Nos. 51778069 & 51708047 & 51978081], the Horizon 2020-Marie Sk?odowska-Curie Individual Fellowship of European Commission [Grant No. 793787], the Natural Science Foundation of Hunan Province [Grant No. 2019JJ50670], and the China Scholarship Council [Grant No. 201808430209]. The raw/processed data required to reproduce these findings cannot be shared at this time due to technical or time limitations. Publisher Copyright: © 2018 The Authors

PY - 2020/7

Y1 - 2020/7

N2 - This paper reports an experimental and theoretical investigation on the fatigue performance enhancement of damaged steel structures by bonded carbon fiber reinforced polymer (CFRP) systems considering the temperature effects. First, thermomechanical properties of the epoxy adhesive and CFRPs were examined via dynamic mechanical analysis (DMA) and tensile tests. The appropriate curing procedure for the structural adhesive was obtained. Next, the fatigue behavior of notched steel plates strengthened by bonded CFRPs was investigated at different temperatures. During the fatigue tests, beach marking and back-face strain techniques were used to monitor the fatigue crack growth on steel components and the damage evolution within the bonding interface. The results show that the high-temperature resistance of the epoxy adhesive can be effectively improved by increasing the curing temperature and duration. The properly cured bonded CFRP patches can effectively enhance the fatigue performance of damaged steel structures. However, and the elevated temperatures significantly degrade the fatigue behavior of the CFRP-strengthened steel components.

AB - This paper reports an experimental and theoretical investigation on the fatigue performance enhancement of damaged steel structures by bonded carbon fiber reinforced polymer (CFRP) systems considering the temperature effects. First, thermomechanical properties of the epoxy adhesive and CFRPs were examined via dynamic mechanical analysis (DMA) and tensile tests. The appropriate curing procedure for the structural adhesive was obtained. Next, the fatigue behavior of notched steel plates strengthened by bonded CFRPs was investigated at different temperatures. During the fatigue tests, beach marking and back-face strain techniques were used to monitor the fatigue crack growth on steel components and the damage evolution within the bonding interface. The results show that the high-temperature resistance of the epoxy adhesive can be effectively improved by increasing the curing temperature and duration. The properly cured bonded CFRP patches can effectively enhance the fatigue performance of damaged steel structures. However, and the elevated temperatures significantly degrade the fatigue behavior of the CFRP-strengthened steel components.

KW - Carbon fiber reinforced polymer (CFRP)

KW - Elevated temperature

KW - Epoxy adhesive

KW - Fatigue

KW - Metallic structure

KW - Reinforcement

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JO - Materials and Design

JF - Materials and Design

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Enhancing fatigue performance of damaged metallic structures by bonded CFRP patches considering temperature effects

Abstract

Keywords

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