Numerical optimizing and experimental evaluation of stepwise rapid high-pressure microwave curing carbon fiber/epoxy composite repair patch

Liu, Xiaoyan; He, Yannan; Qiu, Dacheng; Yu, Zhiqiang

doi:10.1016/j.compstruct.2019.111529

Cited by 11 publications

(12 citation statements)

References 28 publications

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“…[18][19][20] The cost of microwave initiator is much lower than the other high energy radiation strategies, such as ultraviolet, X-ray and electron beam. Besides, the frequency of the microwave ranges from 10 9 to 10 12 Hz, which is similar with the rotational 4,8 and vibration frequency 1,11 of reactive functional group, 12,16 thus, the microwave can change the chain conformation and active the reactive groups selectively in the resin matrix. 21 Microwave hardly damages the structure of the molecule, and has the better penetrability.…”

Section: Introductionmentioning

confidence: 95%

“…[1][2][3][4][5][6][7] The rapid direction variation of the electromagnetic eld motivated the polarized groups on the polymer chains and made it vibrational leading to the raise of the mean kinetic energy and bulk temperature. [8][9][10][11] This effect can accelerate the curing rate and enhance the curing extent of the resin, and it is regarded as the 'thermal effect' of the microwave irradiations. The microwave can transfer energy instantly and uniformly to the affected molecules and avoid the generation of the temperature gradient in the matrix, which leading to better mechanical performance compared with the conduction and convention methods.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Quantitative evaluation of the non-thermal effect in microwave induced polymer curing

Tuo

Zhang

et al. 2021

RSC Adv.

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Section: Introductionmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

Quantitative evaluation of the non-thermal effect in microwave induced polymer curing

Tuo

Zhang

et al. 2021

RSC Adv.

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“…La simulación numérica computacional del compuesto logra determinar los efectos de la dirección del refuerzo, después del proceso de formación, por lo que se puede utilizar una simulación que se enfoque en la formación de refuerzos tejidos (Liu et al, 2019;Picu & Ganghoffer, 2020). El método analítico utiliza expresiones matemáticas para predecir las constantes elásticas del material compuesto como la rigidez y resistencia (Huang et al, 2020).…”

Section: Introductionunclassified

Ensayos experimentales y análisis numérico de la estructura del material compuesto alternativo para la reparación de superficies de vuelo en aeronaves

et al. 2021

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En la actualidad, los materiales compuestos de matriz polimérica son utilizados en múltiples aplicaciones, una de las áreas más importantes de aplicación es en el sector aeronáutico, debido a la relativamente baja densidad que tienen los materiales combinados. Estos compuestos tienen buenas propiedades mecánicas, comparables con materiales metálicos, pero que aportan beneficios adicionales. El objetivo de este trabajo es hacer los ensayos experimentales y el análisis numérico de la estructura del material compuesto alternativo para emplearlos en la reparación de las superficies de vuelo de aeronaves del CIDFAE. Se manejó un proceso ampliamente extendido de envasado al vacío (vacuum bagging) para obtener un compuesto más homogéneo, Lo que redujo los defectos en el procesamiento, y controló mejor la fracción de las fibras y el espesor global del compuesto. Se elaboraron probetas de resina epóxica reforzada con capas de tejido plano de tres fibras distintas de: carbono, vidrio y aramida, en diferentes orientaciones, que fueron ensayadas a tracción, flexión e impacto para determinar sus propiedades mecánicas. Se ha demostrado que los resultados conseguidos mediante la metodología analítica y el método de elementos finitos son aproximados a los resultados que se obtienen con ensayos destructivos. Los resultados experimentales muestran que los valores de resistencia a la tracción son mayores en los materiales de resina epóxica reforzados con 4 capas de fibra de carbono en orientación 0°-90°.

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“…4 The adhesively bonded composite patch, which is widely used in the engineering fields for repairing and strengthening damaged structures, has gained considerable interest. [5][6][7][8][9] Using mechanical fastening would pose new challenges, such as stress concentration, which leads to additional cracks. In contrast, composite patches do not create new defects or cause any damage.…”

Section: Introductionmentioning

confidence: 99%

“…It is observed that the SIF decreases after repairing the pipe with composites, and the fatigue life of the repaired pipe is extended substantially. Liu et al 9 have analyzed the effect of multi-layer composite laminates with various fiber orientations and fiber layers under adhesively bonded repair conditions by ABAQUS. The SIF of bonded structure systems were calculated by the J-integral method.…”

Section: Introductionmentioning

confidence: 99%

Numerical analysis of cracked aluminum plate repaired with multi-scale reinforcement composite patches

Yousefi

Mashhadi

Safarabadi

2020

Journal of Composite Materials

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In this study, numerical modeling is used to investigate the performance of a single-sided composite patch with different scale fillers, as reinforcement of a cracked aluminum plate under static tension. The main concerns of previous studies are about the geometry of patches, composite layups, and failure of adhesive. In this research, the effect of patch properties such as size and fiber volume fraction, the thickness of patch, and thickness of adhesive on the overall performance of the cracked aluminum plate are investigated numerically. Indeed, first, a 3 D representative volume element (RVE) is adopted to calculate the mechanical properties of carbon nanotube (CNT)/epoxy and carbon fiber (CF)/epoxy composite patch at each specified volume fraction for investigating the effect of patch properties on the performance of a single-sided patch for crack repairing. In this regard, the cohesive zone model is adopted to analyze the debonding between the epoxy matrix and reinforcement to characterize the mechanical properties of composite patches. Finally, a linear 3 D finite element analysis is performed to calculate the stress intensity factor (SIF) for cracked aluminum plate repaired by a single-sided composite patch at each specified reinforcement volume fraction for different thickness of patch and different thickness of adhesive. The results demonstrated that the stress intensity factor highly depends on the patch properties (patch stiffness) in addition to patch thickness and adhesive thickness.

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Numerical optimizing and experimental evaluation of stepwise rapid high-pressure microwave curing carbon fiber/epoxy composite repair patch

Cited by 11 publications

References 28 publications

Quantitative evaluation of the non-thermal effect in microwave induced polymer curing

Quantitative evaluation of the non-thermal effect in microwave induced polymer curing

Ensayos experimentales y análisis numérico de la estructura del material compuesto alternativo para la reparación de superficies de vuelo en aeronaves

Numerical analysis of cracked aluminum plate repaired with multi-scale reinforcement composite patches

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