Effects of initial blister radius and shaft diameter on energy release rate of metal–polymer composite coating

Islam, Mohammad S.; Tong, Liyong

doi:10.1016/j.ijadhadh.2015.07.007

Cited by 15 publications

(4 citation statements)

References 18 publications

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“…Then the interfacial debonding grew as a second stage, and finally, the tearing of the composite repair occurred. The total energy release rate (G T ) can be calculated from the critical load seen at the end of the 1st Region (Mohammad and Liyong, 2015). The figure shows that 0.8% improves the behavior of the composite and increases the value of the critical load to 1353.44 N compared to 446.24 N without nano reinforcement and G T was calculated from the critical load according to equation 1 where its value is increased from (0.238 N/mm) to (0.522 N/mm).…”

Section: Blister Test Resultsmentioning

confidence: 99%

Blister test to evaluate the multiwall carbon nanotubes (MWCNT) - Woven carbon fiber-reinforced epoxy used for repairing pipelines

Ahmed,

Kamal,

Abdulkader

et al. 2023

MMMS

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PurposePipelines are subject to pits, holes and cracks after staying in service for a while, especially in harsh environments. To repair the pipelines, composite materials are used, due to composite materials' low cost, high-corrosion resistance and easy handling. This study aims to investigate the reliability of the blister test for evaluating the bonding strength of multiwall carbon nanotube (MWCNT) on woven carbon-reinforced epoxy.Design/methodology/approach Flexural, hardness and Izod impact tests were used to evaluate MWCNT effect on the epoxy by adding different amounts, 0.2, 0.4, 0.6, 0.8 and 1 wt. %, of MWCNT, to be compared with pure epoxy.FindingsThe results showed that 0.8 wt.% gives the highest strength. The experimental results of 0.8 wt.% MWCNT reinforced carbon composite was compared with the finite element model under blister test, and the results showed high similarities.Originality/valueEvaluation of the reliability and the advantages of MWCNT considering the high aspect ratio and high tensile strength, which is more than 15 times compared to steel, MWCNT enhances the strength, stiffness and toughness of epoxy used as a matrix in repairing pipelines, which leads to an increase in the resistance of composite materials against oil internal pressure before delamination.

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Section: Blister Test Resultsmentioning

confidence: 99%

Blister test to evaluate the multiwall carbon nanotubes (MWCNT) - Woven carbon fiber-reinforced epoxy used for repairing pipelines

Ahmed,

Kamal,

Abdulkader

et al. 2023

MMMS

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“…where G n and G s are the energy release rates for mode I and mode II; G nc and G sc denote the critical energy release rates for mode I and mode II, and here we set G nc = G sc = 150 N/m [49]; κ is a parameter. Then, the ultimate mixed-mode relative displacement is:…”

Section: Large Deformation Cohesive Zone Modelmentioning

confidence: 99%

Single-Impact Failure of Multi-Layered Automotive Coatings: A Finite Element-Based Study

et al. 2023

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Automotive coatings are a multi-layered polymer composite structure whose impact resistance is closely related to the appearance and safety of a vehicle. Since experimental methods are of high cost and poor repeatability, in our work, a finite element model is developed for the single-impact failure of automotive coatings. In this model, a multi-mechanism damage model and a large deformation cohesive zone model are employed to account for the polymer-ply and interlaminar failures of the coating, and some rate-dependent material models are adopted to capture the effect of impact velocity. The simulated results indicate that the proposed model can reproduce the failure patterns of automotive coatings well. In addition, the impact failure mechanisms of the coating are revealed. Numerical findings show that both brittle and ductile failures are found in the coating and there are three stages for the propagation of the delamination crack. Finally, we numerically investigate the effects of primer mechanical properties, i.e., Young’s modulus, yield strength, and re-hardening modulus, on the impact resistance of automotive coatings. Our work is helpful to the design of coating, which can improve the impact resistance of automotive coatings.

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“…As shown in Fig.10, a shaft loaded blister test can be implemented, for example, by using a spindle, a pillar or a ball [79] [80]. In recent work, Islam and Tong [81] have experimentally investigated the relationship between the shaft diameter and the de-bonded blister radius, in order to establish their effects on the energy release rate for a metal-polymer composite coating system. Sun et al [82] developed a theoretical model for interfacial adhesion and the coating mechanical properties, such that Poisson's ratio and Young's modulus could be derived synchronously from the shaft-loaded blister test.…”

Section: Shaft Loaded Blister Testmentioning

confidence: 99%

Advances in test and measurement of the interface adhesion and bond strengths in coating-substrate systems, emphasising blister and bulk techniques

et al. 2019

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In this paper, recent advances in the minimum-destructive testing of the adhesion of coating-substrate systems are reviewed, focusing on key techniques such as micro-and nano-scale levels of indentation, scratching, laser-induced wave shock, as well as the blister and buckle approach. Along with adhesion failure tests, the latest and most extensive applications of the adhesion test methods in nano-, micro-and bulkcoating technology and the associated techniques to determine the minimum damage defects left on the coatings are discussed and their use reviewed.

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Effects of initial blister radius and shaft diameter on energy release rate of metal–polymer composite coating

Cited by 15 publications

References 18 publications

Blister test to evaluate the multiwall carbon nanotubes (MWCNT) - Woven carbon fiber-reinforced epoxy used for repairing pipelines

Blister test to evaluate the multiwall carbon nanotubes (MWCNT) - Woven carbon fiber-reinforced epoxy used for repairing pipelines

Single-Impact Failure of Multi-Layered Automotive Coatings: A Finite Element-Based Study

Advances in test and measurement of the interface adhesion and bond strengths in coating-substrate systems, emphasising blister and bulk techniques

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