The relation of porosity and creep behavior of glass fiber/epoxy composite: Design of experiments approach

Alves, Fillip Cortat; Monticeli, Francisco Maciel; Voorwald, Herman Jacobus Cornelis; Cioffi, Maria Odila Hilário

doi:10.1002/pc.26267

Cited by 5 publications

(3 citation statements)

References 38 publications

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“…Propriedades como elevada resistência, rigidez e principalmente tenacidade, se comparadas a termofixos de menor custo, como poliéster e éster-vinilica, fazem com que estas matrizes possam ser aplicadas em componentes que necessitem aplicações de maior performance, como na indústria aeronáutica e espacial. Devido a estas características, a epóxi não se limita aos compósitos, sendo também utilizadas em revestimentos, tintas de alta performance, adesivos e também na biomedicina (ALVES et al, 2021;KALITA et al, 2021).…”

Section: Compósitos Poliméricos De Matriz Epóxiunclassified

Líquidos Iônicos Como Modificadores De Fibras E Reforços

Kerche¹,

Cruz²,

Acosta³

et al. 2022

Open Science Research VI

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Objetivo: Várias fibras, reforços de alto desempenho e elastômeros são utilizados em compósitos. Estes reforços necessitam previamente de tratamentos químicos para melhorar suas propriedades interfaciais com matrizes poliméricas. Métodos: Uma tecnologia recente compreende o uso de líquidos iônicos (LI) como compatibilizantes interfaciais. Essas metodologias podem resultar no desenvolvimento de materiais compósitos com maior desempenho ou características multifuncionais aplicadas. Resultados: Neste Review, é apresentado uma visão geral na área de reforços modificados por IL e seus efeitos nas propriedades de compósitos à base de epóxi, aramida e borracha de estireno-butadieno (SBR). Os IL mais utilizados foram os baseados em cátions imidazólios. Conclusão: Na maioria dos experimentos realizados, quando são utilizados os LI, os reforços apresentam interações mais fortes com as matrizes poliméricas, dependendo da metodologia de tratamento empregado.Interações interfaciais aprimoradas são citadas como a principal razão para a melhoria nos desempenhos mecânico e térmico de compósitos. Observou-se que são necessárias estratégias de utilização de baixo teor de IL, ou metodologias que possibilitem a recuperação dos sais após o tratamento fibra/partícula, bem como o estudo da influência de diferentes quantidades/tipos de IL na estrutura das cargas, fibras e reforços e suas relações com as propriedades finais adquiridas.

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Section: Compósitos Poliméricos De Matriz Epóxiunclassified

Líquidos Iônicos Como Modificadores De Fibras E Reforços

Kerche¹,

Cruz²,

Acosta³

et al. 2022

Open Science Research VI

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“…Creep is also an important mechanical property of composite materials, which refers to the phenomenon that the deformation gradually increases with time under a constant load lower than the tensile strength. [24][25][26][27] The creep mechanism in composites is often complex, which is mainly due to the resin matrix, [28,29] but is also significantly influenced by the fiber orientation and distribution. [30] Eftekhari et al [31] performed creep tests on short glass fiber reinforced injection molded thermoplastic composites in flat sheets.…”

Section: Introductionmentioning

confidence: 99%

Creep properties and damage mechanism of molded glass fiber reinforced plastic

Liu

et al. 2023

Polymer Composites

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Glass fiber reinforced plastic (GFRP) has become one of the most commonly used materials in the structure of aero engines in the last decades. In this study, GFRP was fabricated by molding with phenolic resin as the matrix. Specimens were prepared along horizontal and vertical directions. Fiber distribution, tensile properties, long‐term creep performance, and damage mechanism were systematically investigated. Experimental results shows that horizontal specimens have better tensile properties, lower viscoelasticity, and excellent creep resistance. The fibers inside the cylindrical material exhibit a 3D core‐shell morphology with transverse isotropy in the core region. Load is carried by the fibers and the damage is in the form of fiber fracture and pull‐out in horizontal specimens. Random distribution and interweaving leads to double fracture sections of fibers. Load is carried by the interface and resin, and the damage is in the form of fiber pull‐out laterally and interfacial debonding in vertical specimens. High viscoelasticity of the resin and the weak interfacial bonding ability lead to large creep deformation of vertical specimens. In addition, the creep strain under different loads can be accurately predicted by Modified Time Hardening model.

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“…Therefore, it was particularly important to accelerate the creep experiment and establish the creep model [1][2][3] to predict the creep behavior. Creep is the most direct expression of the viscoelastic properties of polymers [4][5][6] and is also one of the main failure forms of material. Many engineering problems include creep 7,8 mainly exists in fan blades, bridges, parts and other places and has a great impact on safety performance of structure part.…”

Section: Introductionmentioning

confidence: 99%

Research and prediction of creep behavior of triaxial warp‐knitted composites by time–temperature equivalent principle

You,

Gao,

et al. 2023

Polymer Composites

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In this paper, the creep behavior of triaxial warp‐knitted composites (TWKC) was investigated. The TWKC specimens were prepared by applying vacuum‐assisted resin infusion (VARI), and the three‐point bending creep experiments at different temperatures were carried out. The shift factor was calculated based on the activation energy method, and the creep curve at 25°C within 105s was obtained according to the time–temperature equivalence principle, the time–temperature equivalent model was established, and the model was verified by measuring the long‐term creep data with self‐made instrument. There is approximately agreement between the prediction result and experimental one, which is less than 10% within 105s. The results show that the model could be used to predict the creep behavior of TWKC. The viscoelastic properties of the specimen were analyzed based on dynamic mechanical analysis (DMA), and the creep behavior of TWKC was further analyzed by acoustic emission and digital image correlation damage analysis.Highlights The viscoelasticity of TWKC was analyzed based on dynamic mechanical analysis (DMA), and the activation energy was calculated. Based on the activation energy method, the time–temperature equivalent model was established to predict the creep behavior of TWKC. The creep behavior of TWKC were further analyzed by acoustic emission (AE) and digital image correlation (DIC) damage analysis.

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The relation of porosity and creep behavior of glass fiber/epoxy composite: Design of experiments approach

Cited by 5 publications

References 38 publications

Líquidos Iônicos Como Modificadores De Fibras E Reforços

Líquidos Iônicos Como Modificadores De Fibras E Reforços

Creep properties and damage mechanism of molded glass fiber reinforced plastic

Research and prediction of creep behavior of triaxial warp‐knitted composites by time–temperature equivalent principle

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