Interactions between HA/GO/epoxy resin nanocomposites: optimization, modeling and mechanical performance using central composite design and genetic algorithm

Dadrasi, Ali; Fooladpanjeh, Sasan; Gharahbagh, Abdorreza Alavi

doi:10.1007/s40430-019-1564-7

Cited by 22 publications

(17 citation statements)

References 51 publications

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“…This may have contributed to its satisfactory mechanical behavior, which was similar to the control. On the other hand, Concept Advanced, Fill Magic, and Natural Look seemed to be comprised of fillers of irregular shape and size situated within a wider range, which may have allowed stress concentration in the bulk of the materials and, consequently, reduced mechanical properties [5,17]. Furthermore, the presence of only Bis-GMA and UDMA within Concept Advanced has probably resulted in low flexural strength and modulus characteristics, since UDMA is recognized by its low rigidity [18], originating greater deformation of the material when applied to a given force.…”

Section: Discussionmentioning

confidence: 99%

Physico-mechanical characterization and fracture reliability of dental resin composites for enamel restoration

Almeida

Piva

Duarte

et al. 2019

J Braz. Soc. Mech. Sci. Eng.

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This study evaluated the physico-mechanical behavior and the fracture reliability of different dental resin composites indicated for the restoration of the highly mineralized enamel. The following resin composites were tested: Concept Advanced (Vigodent), Fill Magic (Vigodent), Llis (FGM), and Natural Look (DFL); Filtek Z250 (3M ESPE) was used as a universal control. All composites were fully characterized with the following tests: degree of conversion (DC), flexural strength (σ), flexural modulus (E), water sorption (WS) and solubility (SL), hardness (KMN). Scanning electron microscopy was used for morphological evaluation, whereas the topographical evaluation was carried out by profilometry (Ra) and atomic force microscopy. The color stability of the resin composites was also assessed using a digital spectrophotometer and the CIEL * a * b * system. Data were analyzed with ANOVA as well as the Weibull analysis (α = 5%). DC was similar among all composites (51.0-62.3%, p = 0.104). Llis and the control showed overall greater mechanical performance and hardness than the others. Llis and Natural Look presented lower WS and SL than the others. The control acquired smoother surface than the enamel composites. Concept Advanced and Natural Look demonstrated the greatest and lowest reliability of the study, respectively, whereas Llis showed the greatest characteristic strength (p < 0.05). Llis showed the greatest color stability of the study after 28 days of water storage (p < 0.05). In conclusion, our findings confirmed the performance of four different resin composites indicated to restore dental enamel, showing that two of them (Llis and Natural Look) can be sufficiently strong for the restoration of stress-receiving areas, such as the posterior dentition. Most of the enamel composites were as reliable as the universal control resin composite.

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Section: Discussionmentioning

confidence: 99%

Physico-mechanical characterization and fracture reliability of dental resin composites for enamel restoration

Almeida

Piva

Duarte

et al. 2019

J Braz. Soc. Mech. Sci. Eng.

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“…ANN model has been described by several researches in detail [40][41][42]. ANN is a nonlinear model which is composed of a large neuron collection.…”

Section: Artificial Neural Network (Ann)mentioning

confidence: 99%

RSM and ANN modeling of the energy absorption behavior of steel thin-walled columns: a multi-objective optimization using the genetic algorithm

Dadrasi

Albooyeh

Fooladpanjeh

et al. 2020

J Braz. Soc. Mech. Sci. Eng.

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In many industries, it is necessary to use structures that exhibit a proper stability against the design loads and depreciate the energy in a controlled manner. In this study, the energy absorption characteristics of thin-walled structures with rectangular cross sections are investigated under the quasi-static loading. The section of structures has a different aspect ratio, and in all of them, an elliptical cutout with a different diameter ratio exists on the larger side. In all instances, the area of the cross section and cutout is constant. Hence, an experimental design with two design parameters consisting of the shell aspect ratio and the diameter ratio of the cutout was conducted by applying the central composite design method. Energy absorption parameters were modeled using the artificial neural network and the response surface method. A systematic crashworthiness study was carried out with a multi-objective optimization design using the genetic algorithm. The results showed that the optimal amount of the specific energy absorption was 14.48 kJ/kg and the optimal amount of the peak crushing load was 37.77 kN which was obtained in the aspect ratio of 1 and the diameter ratio of 0.7. The validity of the results was confirmed by empirical experiments.

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“…Composites are very important because of their strength and stiffness, yet very light in weight, compared to conventional materials [10]. The composites are compound materials which differ from alloys based on the fact that the individual components retain their characteristics, hence they tend to have improved properties such as tensile strength, flexural strength, impact strength, resistance to water and chemicals when used for various application [11][12][13][14][15][16]. Synthetic polymers are important because of the desirable properties of the resulting products.…”

Section: Introductionmentioning

confidence: 99%

“…Synthetic polymers are important because of the desirable properties of the resulting products. Epoxy resin, for example, is one of the polymer matrices that undergoes such modification due to its high strength, high stiffness, chemical stability, and low cost [11,17].…”

Section: Introductionmentioning

confidence: 99%

Studies on physico-mechanical behaviour of kenaf/glass fiber reinforced epoxy hybrid composites

Birniwa¹,

Abdullahi²,

Yakasai³

et al. 2021

Bull. Chem. Soc. Eth.

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In this study, various treated, untreated, and treated kenaf/glass fiber composites were fabricated using epoxy resin. A portion of kenaf fibers were subjected to treatment with alkali, sub-portion was taken for benzoyl peroxide and potassium permanganate prior to composite fabrication. This treatment on the composite material was undertaken to achieve improved modification of the interface between the matrix and fiber bond. A portion of the glass fiber was used for enhancing the mechanical properties of the hybrid composite. The tensile strength, flexural, density, water absorption and chemical resistance of the composites were analyzed using standard methods. FTIR was conducted on the fiber to ascertain the chemical treatment on the fibers, FESEM was used for the morphological study. The results obtained showed that the tensile and flexural strength improved from 46.45-298.3 kgf, and 10.5-54.7 kgf, respectively, in the composite samples. Chemical resistance of the kenaf fiber treated potassium permanganate composite improved compared to the untreated fiber composite in both cases. The density and water absorption properties of the composites were found to decrease in the treated fibers compared to untreated fiber composites, this treated composites showed less water absorption and density. The FTIR result revealed that reaction has taken place between the fiber and the treatment reagent. Hence, fiber modification has improved the properties of the composites due to increase in fiber-matrix interaction. KEY WORDS: Chemical properties, Epoxy resin, Hybrid, Kenaf, Mechanical strength, Natural fiber Bull. Chem. Soc. Ethiop. 2021, 35(1), 171-184. DOI: https://dx.doi.org/10.4314/bcse.v35i1.15

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Interactions between HA/GO/epoxy resin nanocomposites: optimization, modeling and mechanical performance using central composite design and genetic algorithm

Cited by 22 publications

References 51 publications

Physico-mechanical characterization and fracture reliability of dental resin composites for enamel restoration

Physico-mechanical characterization and fracture reliability of dental resin composites for enamel restoration

RSM and ANN modeling of the energy absorption behavior of steel thin-walled columns: a multi-objective optimization using the genetic algorithm

Studies on physico-mechanical behaviour of kenaf/glass fiber reinforced epoxy hybrid composites

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