Effect of pre-installed corrosion on steel plate-CFRP bond characteristics

Chotickai, Piya

doi:10.1016/j.ijadhadh.2018.05.010

Cited by 13 publications

(4 citation statements)

References 18 publications

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“…From this point of view, many investigations have been conducted on metal-CFRP joints under corrosion conditions. Chotickai (2018) investigated the mechanical properties of pre-corroded metal-CFRP joints and reported that the rougher surface caused by severer corrosion enlarged the joint strength. Freitas et al (2017) investigated the adhesion quality of composite-to-metal bonded joints under salt spray aging conditions.…”

Section: Introductionmentioning

confidence: 99%

Effect of corrosion on mechanical properties for CFRP/aluminum adhesive joints under a salt spray environment

Kobayashi

Yanagisawa

Osada

et al. 2023

Mechanical Engineering Journal

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In this study, we aim to investigate the effect of galvanic corrosion on the mechanical properties of aluminum-CFRP adhesive joints. Aluminum-CFRP, aluminum-aluminum, and CFRP-CFRP adhesive joint specimens were prepared. Subsequently, the specimens were subjected to accelerated aging treatment in a salt spray environment, and the tensile shear adhesive strength, the transition of the failure surface and the deposition state and the components of corrosion products with aging time were quantitatively evaluated. As a result, in aluminum-CFRP adhesive joints under the salt spray, galvanic corrosion of the aluminum substrate occurred within 24 hours, and the adhesive-adherend interfacial strength decreased significantly compared to aluminum-aluminum and CFRP-CFRP adhesive joints. In addition, the failure mode of aluminum-CFRP adhesive joints changed from the mixed failure of interfacial failure, cohesive failure, and fiber tear failure to interfacial failure. Furthermore, it was found that the deposition amount of Al 2 O 3 increased under the influence of the salt spray environment.

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Section: Introductionmentioning

confidence: 99%

Effect of corrosion on mechanical properties for CFRP/aluminum adhesive joints under a salt spray environment

Kobayashi

Yanagisawa

Osada

et al. 2023

Mechanical Engineering Journal

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“…However, what should be pointed out is that almost all the aforementioned studies were focused on the bond behavior between CFRP materials and the intact steel substrates, i.e., the uncorroded steel surface, only a very small amount of experimental work has been involved with the bond properties for CFRP material externally bonded to corroded steel substrates [ 12 , 26 , 27 ]. The limited experimental data have shown that the increase in surface area, surface free energy and surface roughness caused by corrosion would took positive effect on the ultimate bearing capacity of the bonding interface, and longer CFRP plates may be required to ensure the effectiveness of load transformation when the CFRP strengthening system is adopted for corroded steel structures [ 12 ].…”

Section: Introductionmentioning

confidence: 99%

Estimation of Bond Strength and Effective Bond Length for the Double Strap Joint between Carbon Fiber Reinforced Polymer (CFRP) Plate and Corroded Steel Plate

Wang

et al. 2022

Polymers

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In this paper, we examine the development of the estimation models of bond strength and effective bond length for a double strap joint between carbon fiber reinforced polymer (CFRP) plate and corroded steel plate. The experimental study on the bond behavior between CFRP plate and corroded steel plate is summarized first and the analytical interfacial bond–slip model for CFRP plate externally bonded to corroded steel plate is proposed. Based on the theoretical stress analysis for the CFRP plate–corroded steel plate double-lap joint, the piecewise expressions of the interfacial shear stress and the normal peel stress of the interface between CFRP plate and corroded steel plate were established. The estimation models of the bond strength and the effective bond length for the double strap joint between the CFRP plate and the corroded steel plate were consequently developed on the basis of interfacial stress distribution equations and the stress boundary conditions. The comparison between the predicted and experimental results indicated that the proposed models could be adopted to predict the bond strength and effective bond length for the CFRP plates externally bonded to corroded steel substrates with reasonable accuracy. The proposed estimation models are expected to provide meaningful references and essential data for the reliable application of CFRP strengthening system to the performance improvement of corroded steel structures.

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“…Recently, a few studies have been concerned with the applications of CFRP materials in the reinforcement of corroded steel structures. Chotickai [24], Li et al [25,26], and Xu et al [27] have investigated the bond properties between CFRP materials and precorroded steel plates. Sharaf et al [28] conducted an experimental and numerical analysis of the behavior of corroded steel plates strengthened with thin-ply glass/carbon hybrid FRP composites.…”

Section: Introductionmentioning

confidence: 99%

Stress Concentration Analysis of the Corroded Steel Plate Strengthened with Carbon Fiber Reinforced Polymer (CFRP) Plates

Wang

et al. 2022

Polymers

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The purpose of this study is to investigate the stress concentration of a corroded steel plate strengthened with carbon fiber reinforced polymer (CFRP) plates. An accelerated corrosion experiment was first executed to acquire corroded steel plates, and then surface profile measurements were conducted to obtain 3D coordinate data of the corroded steel surface. Finite element models considering the surface morphology of the corroded steel plate and the interfacial bonding properties between the CFRP plate and the corroded steel plate were established to investigate the stress concentration of the corroded steel plate strengthened with and without CFRP plates. The reliability of the numerical modeling method was verified based on a mesh convergence analysis and a comparison of the fatigue test, 3D morphology scanning, and numerical analysis results. Specimens with five levels of corrosion damage, six kinds of CFRP-strengthening stiffness, five kinds of adhesive thickness, and five levels of CFRP prestress were numerically modeled. The primary indications consist of features of stress distribution, and the stress concentration factors Kt and Ktg were analyzed. Results showed that the features of stress distribution and the stress concentration factor Kt of the corroded steel plate strengthened with and without CFRP plates are only related to the shape, size, and position of rust pits, but not to the degree of uniform corrosion or the reinforcement parameters. The value of Kt for the corroded steel plate with a corrosion duration of 6~18 months and a weight loss rate of 9.16~21.78% was approximately 1.199~1.345. The converted stress concentration factor Ktg has more practical significance than the stress concentration factor Kt in describing the influence of corrosion and CFRP reinforcement on the peak tensile stress of the corroded steel plate. The value of Ktg increased linearly with the increase of the weight loss rate of the corroded steel plate and decreased appreciably with the increase of the strengthening stiffness and prestress level of the CFRP plates, and it presented a very small increasing trend with the increase of the adhesive thickness.

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Effect of pre-installed corrosion on steel plate-CFRP bond characteristics

Cited by 13 publications

References 18 publications

Effect of corrosion on mechanical properties for CFRP/aluminum adhesive joints under a salt spray environment

Effect of corrosion on mechanical properties for CFRP/aluminum adhesive joints under a salt spray environment

Estimation of Bond Strength and Effective Bond Length for the Double Strap Joint between Carbon Fiber Reinforced Polymer (CFRP) Plate and Corroded Steel Plate

Stress Concentration Analysis of the Corroded Steel Plate Strengthened with Carbon Fiber Reinforced Polymer (CFRP) Plates

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