Long‐term environmental bending behaviors and service LIFE prediction of KEVLAR fiber mat epoxy composite

Muralidharan, Muniraju; Sathishkumar, TP; de‐Prado‐Gil, Jesús; Martínez‐García, Rebeca

doi:10.1002/pc.26549

Cited by 5 publications

(4 citation statements)

References 44 publications

(100 reference statements)

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“…Based on the activation energy calculated above, the time–temperature equivalent shift factor can be calculated according to the Arrhenius formula, taking 25°C as the target temperature. The formula 32,33 is shown in Equation (), and the shift factors calculated at different temperatures are shown in Table 4.

\lg a_{T} = \frac{Δ E}{R} (\frac{1}{T} - \frac{1}{T_{0}})

…”

Section: Resultsmentioning

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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\lg a_{T} = \frac{Δ E}{R} (\frac{1}{T} - \frac{1}{T_{0}})

…”

Section: Resultsmentioning

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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“…Glass fibers are available in various forms, glasswoven fabric is used as a medium for reinforcement and polyester resin is used as matrix material in certain investigations. [12][13][14][15] Another study says that the examination of connection between a wide range of polymer matrices reports that common assumption of filler module is independent of matrix and explained the apparent under performance of graphene in impact applications. [16] Even at very low wt% of filler content in the polymer nanocomposite, the presence of graphene additives tend to enhance the materials properties.…”

Section: Introductionmentioning

confidence: 99%

Effect of stacking sequence and silicon carbide nanoparticles on properties of carbon/glass/Kevlar fiber reinforced hybrid polymer composites

et al. 2022

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Synthetic fibers as reinforcement in composites are inevitable in today's composite industry due to its exceptional mechanical properties. The objective of this paper is to investigate the effect of stacking sequence of carbon, glass and Kevlar bidirectional (0 /90 ) woven mat synthetic fibers reinforced in epoxy matrix composite with silicon carbide (SiC) nanoparticles as filler material on mechanical and visco-elastic behavior of developed novel hybrid polymer matrix composites (HPMCs). Vacuum bag infusion method is adopted to manufacture the composite specimens by stacking carbon, glass and Kevlar fibers alternatively with six layers and six different stacking sequences and tested as per ASTM standards. Tensile, flexural, impact and hardness test is conducted to identify the composite specimen with maximum mechanical characteristics. The maximum tensile and flexural strength of 398.178 and 671.25 MPa respectively is seen for the composite with strong fibers such as carbon and glass stacked away from the neutral axis. Also, the scanning electron microscope (SEM) images of tensile and flexural failure specimen revealed the failure mechanisms of developed composite specimens. Moreover, the dynamic mechanical analysis (DMA) revealed the visco-elastic behavior of developed composites with glass transition temperature (T g ) at 115 C. This study emphasizes the influence of stacking sequence on thermo-mechanical properties of the developed HPMC specimens and explores its potential for diverse applications.

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“…[8][9][10] Recently, studies on nano-clay-filled polymer composites show promising prospects in improving the mechanical and physical properties of composites. [11,12] Due to the high surface-to-volume ratio of nano-clay, only a very small amount of nano-clay filler is needed to be incorporated into the polymer. The technical challenge of using nano-clay in polymer nano-composites is to achieve good nano-clay dispersion in the polymer matrix.…”

Section: Introductionmentioning

confidence: 99%

Experimentation, optimization, and predictive analysis of compressive behavior of montmorillonite nano‐clay/unsaturated polyester composites

et al. 2022

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The effect of montmorillonite (MMT) nano-clay as reinforcement in unsaturated polyester resin (UP) matrix composite was investigated under compression loading to explore the impact of MMT nano-clay wt% in the compressive behavior of UP-MMT nano-clay composite. UP-MMT nano-clay composite samples were prepared with a varied filler content of 0.5 to 3 wt% using dualmixing methods, which are mechanical stirring and ultrasonic agitation.Static uniaxial compression tests were conducted using cylindrical-shaped samples to obtain the compressive behavior of the UP-MMT nano-clay composites. The results of experimentation record a considerable improvement in compressive characteristics of UP-MMT nano-clay composites compared to pure UP matrix. The UP-MMT nano-clay composite samples were viewed under transmission electron microscope (TEM) to know the dispersion of MMT nano-clay in the composites. The nano-platelets were well dispersed and intercalated in the UP-MMT nano-clay composite samples below 1 wt% MMT nano-clay loading. The optimum wt% of MMT nano-clay in the UP-MMT nano-clay composite for improved compressive stress at yield and modulus were noted as 0.60 and 0.61 wt% respectively. Moreover, a mathematical model using Halpin-Tsai-Jumahat equations was utilized to predict the compressive properties of UP-MMT nano-clay composites, which are in closer agreement with the experimental results.

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Long‐term environmental bending behaviors and service LIFE prediction of KEVLAR fiber mat epoxy composite

Cited by 5 publications

References 44 publications

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

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

Effect of stacking sequence and silicon carbide nanoparticles on properties of carbon/glass/Kevlar fiber reinforced hybrid polymer composites

Experimentation, optimization, and predictive analysis of compressive behavior of montmorillonite nano‐clay/unsaturated polyester composites

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