Bond durability of fatigued CFRP-steel double-lap joints pre-exposed to marine environment

Borrie, Daniel; Liu, H.B.; Zhao, Xiao‐Ling; Raman, R.K. Singh; Bai, Yu

doi:10.1016/j.compstruct.2015.06.021

Cited by 55 publications

(22 citation statements)

References 31 publications

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“…This study led to the realisation that a hot/wet environment can adversely affect the adhesive and/or the composite matrix rather than the metal-adhesive interface. Similar findings have also been reported for CFRP to steel joints/repairs [26].…”

Section: Experimental Test and Analysis Requirements For Cfrp Repairssupporting

confidence: 77%

Composite repairs to bridge steels demystified

Ali

Raman

Zhao

et al. 2017

Composite Structures

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Section: Experimental Test and Analysis Requirements For Cfrp Repairssupporting

confidence: 77%

Composite repairs to bridge steels demystified

Ali

Raman

Zhao

et al. 2017

Composite Structures

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“…The reductions in fatigue life in this experimental investigation are comparable to bond strengths lost during identical exposures in previous work [41]. The joints that comprised of one layer of HM CFRP witnessed reductions in strength of at least 10% after exposure.…”

Section: Comparison With Previous Researchsupporting

confidence: 83%

“…During submergence, specimens were simultaneously subjected to static tensile loads from a compressed spring using a hydraulic pump and calibrated gauge (identical to those in [41]). The applied load was 34.5 kN, which equates to 30% of the yield strength (r y ) of the steel.…”

Section: Exposed Specimensmentioning

confidence: 99%

“…Fatigue, environmental durability and temperature effects, as well as their combined effects, are commonly considered critical issues for adhesively bonded CFRP-steel joins [35]. Temperature, humidity and water ingress have shown to significantly impair the durability of CFRP bonds [36][37][38][39][40][41]. In fact, several studies of the past 5 years [42,43] have witnessed levels of corrosion under the composite patch after exposure to extreme environments.…”

Section: Introductionmentioning

confidence: 98%

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Fatigue performance of CFRP patched pre-cracked steel plates after extreme environmental exposure

Borrie

Zhao

Raman

et al. 2016

Composite Structures

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“…The increasing use of CFRPs for strengthening and retrofitting can be attributed to their excellent material properties, including a high stiffness‐to‐weight ratio, high strength‐to‐weight ratio, and ease of field application . These structural members typically encounter high humidity environments or are exposed to aggressive elements such as ions (a chloride‐containing environment), which can often accelerate their degradation and decrease their structural integrity . Because long service lives are required for civil engineering structures under various harsh environmental conditions, the long‐term mechanical behavior of CFRP composites or CFRP‐strengthened structures is always a concern .…”

Section: Introductionmentioning

confidence: 99%

Durability of CFRP sheets and epoxy resin exposed to natural hygrothermal or cyclic wet‐dry environment

Xie

Guo

et al. 2017

Polymer Composites

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Fiber reinforced polymer (FRP) composites are used in harsh environments, resulting in degradation of their mechanical properties. Such degradation is critical in terms of the reliable design and application of FRP composites. In this study, a set of CFRP flat coupons and epoxy resin matrix flat coupons were prepared and subjected to alternating conditions of 10 h immersion in a 40°C NaCl solution with a concentration of 3.5%, and 14 h drying at 25°C and 60% relative humidity (RH). They were divided into five series, subjected to 0, 60, 120, 240, and 360 wet‐dry cycles, respectively. For a comparison with the acceleration simulation tests, the same numbers of specimens were exposed to a natural hygrothermal environment for 0, 6, 12, 18, and 30 months, respectively. After removal from the environment at the designated time, a series of tension tests were carried out. Based on the experimental results, the relationship regarding the tensile strength degradation of the CFRP sheets between the natural hygrothermal environment and the cyclic wet‐dry environment was determined. It was found that the tensile modulus of the CFRP sheets increased by 1.4%, and the tensile strength and ultimate strain decreased by 8.1% and 8.0% after 360 wet‐dry cycles, respectively. After a 30‐month natural exposure period, the tensile strength, tensile modulus, and ultimate strain of the CFRP sheets decreased by 9.9%, 3.4%, and 7.2%, respectively. The tensile property of the epoxy resin matrix appeared to be more sensitive to these two types of exposure environments than that of the CFRP sheets, and the tensile strength decreased by 59.4% at the end of 30‐month exposure. POLYM. COMPOS., 40:553–567, 2019. © 2017 Society of Plastics Engineers

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Bond durability of fatigued CFRP-steel double-lap joints pre-exposed to marine environment

Cited by 55 publications

References 31 publications

Composite repairs to bridge steels demystified

Composite repairs to bridge steels demystified

Fatigue performance of CFRP patched pre-cracked steel plates after extreme environmental exposure

Durability of CFRP sheets and epoxy resin exposed to natural hygrothermal or cyclic wet‐dry environment

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