Strength enhancement of CFRP joints composed of partially unmolded laminates manufactured using Vacuum-Assisted Resin Transfer Molding (VARTM)

Abusrea, Mahmoud; Shazly, Mostafa; Matsubara, Terutake; Wang, Wenxue; Arakawa, Kazuo

doi:10.1080/00218464.2021.2020112

Cited by 7 publications

(2 citation statements)

References 29 publications

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“…The physical and mechanical properties of the glass fiber and the epoxy resin are shown in Table 2 and Table 3, respectively. The test blocks were fabricated by laminating eight plies of the glass fiber using VARTM, [22][23][24][25] as shown in Figure 1. The VARTM process consists of three steps: fabricating a vacuum package, infusing the resin, and molding.…”

Section: Methodsmentioning

confidence: 99%

Empirical modeling of force and temperature in drilling bone-simulating hybrid composites

Abusrea

Ahmadi

Sadek

2023

Journal of Composite Materials

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Hybrid polymer composites are utilized in biomechanical design and orthopedic surgery training to imitate the thermomechanical behavior of human bones. Despite extensive research on the mechanics of hybrid composites in biomechanical design, information on their thermomechanical response during orthopedic drilling operations is scarce. This paper presents a new experimental study to characterize the force and temperature generated during the drilling of hybrid composites that simulate human bones. To simulate the hybrid multi-layer structure of bones, the studied composite comprises a Polyurethane core sandwiched between Glass-Fiber Reinforced Polymer (GFRP) layers—the former resembling the cancellous part of the bone and the latter cortical layers. This study also identifies an empirical relationship between thrust force, temperature, drilling feed and speed, and composite composition. Empirical models are developed using multivariate polynomial regression (MPR) and artificial neural network (ANN) to predict the force and temperature during drilling. The models have a correlation coefficient of above 0.9 between predicted and measured results and can be used to improve orthopedic drilling design and control.

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Section: Methodsmentioning

confidence: 99%

Empirical modeling of force and temperature in drilling bone-simulating hybrid composites

Abusrea

Ahmadi

Sadek

2023

Journal of Composite Materials

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“…Compared to traditional materials, the sandwich panel has design flexibility, lower density, and good corrosion resistance. Epoxies are one of the most important classes of thermosetting polymers [6] and are widely used in structural engineering applications [7] due to their properties. One of the practical advantages of epoxy resins is that they adhere well to a metal surface [8], which is advantageous over the industrial application intended for our sandwich structure [9].…”

Section: Introductionmentioning

confidence: 99%

Modelling of the effect of ATH fillers on the rheology, curing kinetics, and flexural properties of the epoxy resin forming the hydraulic turbines' stay vanes extension

Ouadday

Boukhili

Vadean

et al. 2022

Preprint

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Epoxy resins are essential for the manufacturing of GFRP/XPS foam sandwich structures used for hydraulic turbine extension stay vanes. Their properties during and after curing are key factors for the performance of the entire hybrid composite structure. This paper introduces experimental characterization and modeling of the influence of the quantity and size of ATH fillers on the curing and post-curing characteristics of the epoxy resin. The experimental investigation involves the maximum temperature, polymerization time, shrinkage, viscosity, and flexural properties. The mass fractions of the ATH were 10, 20, 30, 40, 50, and 60%, and the particle sizes were 2, 4, 6, 8, and 12 µm. In addition, we utilized the multivariate polynomial regression (MPR) and artificial neural network (ANN) methods to develop empirical models to predict the maximum temperature, polymerization time, shrinkage, and flexural modulus. The experimental results showed that increasing ATH mass fraction with smaller particle size delayed polymerization and lowered the maximum temperature. The experimental viscosity values showed that Mooney model can accurately calculate viscosity as a function of ATH mass fraction and particle size, compared to the Quemada and Krieger-Dougherty models. Adding ATH increased flexural strength, modulus, and breakage strain. The developed models achieved a higher than 0.9 correlation coefficient between the predicted and measured responses and can be used to enhance the design and control the casting of the proposed sandwich structures.

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Joining methods for Fiber Reinforced Polymer (FRP) composites − A critical review

Ravichandran,

Balasubramanian

2024

Composites Part A: Applied Science and Manufacturing

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Strength enhancement of CFRP joints composed of partially unmolded laminates manufactured using Vacuum-Assisted Resin Transfer Molding (VARTM)

Cited by 7 publications

References 29 publications

Empirical modeling of force and temperature in drilling bone-simulating hybrid composites

Empirical modeling of force and temperature in drilling bone-simulating hybrid composites

Modelling of the effect of ATH fillers on the rheology, curing kinetics, and flexural properties of the epoxy resin forming the hydraulic turbines' stay vanes extension

Joining methods for Fiber Reinforced Polymer (FRP) composites − A critical review

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