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Pan Shaoming - One of the best experts on this subject based on the ideXlab platform.
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Bonding Mechanism of WC-12Co Coatings Prepared by Supersonic Plasma Spraying on Aluminum Substrate
Hot Working Technology, 2008Co-Authors: Pan ShaomingAbstract:WC-12Co coatings were prepared on polished aluminum substrate by supersonic plasma spraying.The Bond Mechanism between coatings and substrate were investigated by SEM.The Bond is mainly mechanical Bonding, and partially metallurgical Bonding, physical Bonding and diffusion.The results indicate that WC can be embed ded in the interior of substrate, the depth rises with the decrease of substrate hardness or the increase of particles velocity.
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Bonding Mechanism of WC-12Co Coatings Prepared by Supersonic Plasma Spraying on Aluminum Substrate
Hot Working Technology, 2008Co-Authors: Pan ShaomingAbstract:WC-12Co coatings were prepared on polished aluminum substrate by supersonic plasma spraying.The Bond Mechanism between coatings and substrate were investigated by SEM.The Bond is mainly mechanical Bonding, and partially metallurgical Bonding, physical Bonding and diffusion.The results indicate that WC can be embed ded in the interior of substrate, the depth rises with the decrease of substrate hardness or the increase of particles velocity.
Su-jin Lee - One of the best experts on this subject based on the ideXlab platform.
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Predicting pull-out behaviour based on the Bond Mechanism of arch-type steel fibre in cementitious composite
Composite Structures, 2015Co-Authors: J.-p. Won, Jae-ho Lee, Su-jin LeeAbstract:In this study, we investigated the Bond Mechanism associated with the pull-out behaviour of arch-type steel fibre in cementitious composite. Prediction model development and Bond Mechanism analysis were conducted in parallel on hooked-end-type steel fibre having the same tensile strength. Pull-out tests were performed using the single fibre-single-sided method, according to JCI SF-8. The Bond Mechanism analysis of arch-type steel fibre, from the pull-out test results using a transparent epoxy matrix, confirmed that pull-out resistance was maintained, without a drastic decrease in the pull-out load under plastic bending or frictional forces; these forces acted simultaneously throughout all pull-out stages until completion. Based on our results, the pull-out behaviour of arch-type steel fibre was classified into three pull-out stages: deBonding and pull-out initiation, achievement of maximum pull-out load while passing through the bend section, and the final pull-out stage as the fibre passed through the arch. The proposed model for the pull-out behaviour of arch-type steel fibre was verified by a pull-out test using a cement matrix. The maximum pull-out resistance strength and interfacial toughness differed by 2.0% and 17.0%, respectively, from values given by the prediction model, and coincided with three-stage pull-out behaviour.
Sami H Rizkalla - One of the best experts on this subject based on the ideXlab platform.
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investigation of Bond in concrete structures strengthened with near surface mounted carbon fiber reinforced polymer strips
Journal of Composites for Construction, 2003Co-Authors: Tarek K Hassan, Sami H RizkallaAbstract:Fiber reinforced polymer (FRP) materials are currently produced in different configurations and are widely used for the strengthening and retrofitting of concrete structures and bridges. Recently, considerable research has been directed to characterize the use of FRP bars and strips as near surface mounted reinforcement, primarily for strengthening applications. Nevertheless, in-depth understanding of the Bond Mechanism is still a challenging issue. This paper presents both experimental and analytical investigations undertaken to evaluate Bond characteristics of near surface mounted carbon FRP (CFRP) strips. A total of nine concrete beams, strengthened with near surface mounted CFRP strips were constructed and tested under monotonic static loading. Different embedment lengths were used to evaluate the development length needed for effective use of near surface mounted CFRP strips. A closed-form analytical solution is proposed to predict the interfacial shear stresses. The model is validated by comparing t...
J.-p. Won - One of the best experts on this subject based on the ideXlab platform.
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Predicting pull-out behaviour based on the Bond Mechanism of arch-type steel fibre in cementitious composite
Composite Structures, 2015Co-Authors: J.-p. Won, Jae-ho Lee, Su-jin LeeAbstract:In this study, we investigated the Bond Mechanism associated with the pull-out behaviour of arch-type steel fibre in cementitious composite. Prediction model development and Bond Mechanism analysis were conducted in parallel on hooked-end-type steel fibre having the same tensile strength. Pull-out tests were performed using the single fibre-single-sided method, according to JCI SF-8. The Bond Mechanism analysis of arch-type steel fibre, from the pull-out test results using a transparent epoxy matrix, confirmed that pull-out resistance was maintained, without a drastic decrease in the pull-out load under plastic bending or frictional forces; these forces acted simultaneously throughout all pull-out stages until completion. Based on our results, the pull-out behaviour of arch-type steel fibre was classified into three pull-out stages: deBonding and pull-out initiation, achievement of maximum pull-out load while passing through the bend section, and the final pull-out stage as the fibre passed through the arch. The proposed model for the pull-out behaviour of arch-type steel fibre was verified by a pull-out test using a cement matrix. The maximum pull-out resistance strength and interfacial toughness differed by 2.0% and 17.0%, respectively, from values given by the prediction model, and coincided with three-stage pull-out behaviour.
Mijia Yang - One of the best experts on this subject based on the ideXlab platform.
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Bond Mechanism and Bond strength of gfrp bars to concrete a review
Composites Part B-engineering, 2016Co-Authors: Fei Yan, Zhibin Lin, Mijia YangAbstract:Abstract Glass fiber-reinforced polymer (GFRP) reinforcements are taken as an alternative solution for the deterioration of civil infrastructures. GFRP bars have received increasing attention due to low cost compared to carbon fiber-reinforced polymer (CFRP) bars. Bond characteristic of GFRP bars in concrete is the most critical parameter for implementation of the material to the corrosion-free concrete structures. Unlike steel reinforcement, GFRP materials behave anisotropic, non-homogeneous and linear elastic properties, which may result in different force transfer Mechanism between reinforcement and concrete. With the purpose of covering the most valuable contributions regarding Bond Mechanism in the past work, a comprehensive review focusing on the failure mode and Bond strength is carried out in this paper. A database consisted of 682 pullout-test specimens was created to observe the factors affecting Bond behavior. Basic relationship between Bond strength/slip and factors was analyzed accordingly. In addition, the development of Bond degradation under environmental conditions, such as freezing-thawing cycling, wet-dry cycling, alkaline solutions and high temperature was presented thereafter. These environmental influences need to be further investigated.