Effect of laminate thickness on moisture diffusion of polymer matrix composites in artificial seawater ageing

Pal, Ratna; Murthy, H. N. Narasimha; Sreejith, M.; Mahesh, K.R. Vishnu; Krishna, M.; Sharma, Sandeep

doi:10.1007/s11706-012-0177-1

Cited by 16 publications

(11 citation statements)

References 13 publications

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“…In recent years, there have been several research studies to evaluate the effect of hydrothermal aging on the mechanical properties of composite laminates subjected to different types of loading conditions like tensile, flexural, shear, and compression . For instance, José‐Trujillo et al investigated the moisture absorption behavior and mechanical properties of composite laminates with different fiber and matrix types immersed in SW, and found that the SW aging causes a severe and negative impact on the mechanical properties of composite laminates.…”

Section: Introductionmentioning

confidence: 99%

Low‐velocity impact behavior of glass fiber‐MWCNT/polymer laminates exposed to seawater and distilled water aging

et al. 2020

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The influence of seawater (SW) and distilled water (DW) aging on low‐velocity impact behavior of glass fiber/polymer laminates with and without multiwalled carbon nanotubes (MWCNTs) is experimentally investigated. To this aim, unidirectional glass fiber fabrics were coated with 0.75 wt% MWCNTs by airbrushing, infused with resin (epoxy or vinylester), and cured. Then, composite laminates with and without MWCNTs were cut into specimens for low‐velocity impact testing and exposed to hydrothermal aging by immersing them to SW and DW at 60°C for ~2000 h. After that time of conditioning, dry and wet specimens were tested using a drop‐weight tower with an impact energy of 15 J. Results showed that the moisture absorption content of composite laminates exposed to SW and DW aging is considerably higher on epoxy‐based specimens with respect to vinylester ones. The impact tests revealed that the measured impact peak force and absorbed energy in wet specimens are significantly lower compared to dry specimens due to plasticizing effect of the matrix. With the incorporation of MWCNTs into the laminates, the absorbed energy is increased due to additional damage mechanisms induced at CNT‐rich regions during the impact loading. It was also found that the damage area of the laminates after impact tends to be more prominent for laminates fabricated using vinylester resin than for those using epoxy resin as a result of its brittle behavior during impact loading. Post impact damage analyses by ultrasonic C‐scan imaging and scanning electron microscopy showed that matrix cracking, fiber breakage, fiber/matrix debonding, and delamination are the main damage mechanisms induced in the dry and wet specimens during impact.

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Section: Introductionmentioning

confidence: 99%

Low‐velocity impact behavior of glass fiber‐MWCNT/polymer laminates exposed to seawater and distilled water aging

et al. 2020

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“…Pal et al. 12 reported the resulting mechanical property degradation of composite laminates produced with glass and carbon fibers and polyester and vinylester resins. Recently, Mungamurugu et al.…”

Section: Introductionmentioning

confidence: 99%

Seawater ageing effect on the mechanical properties of composites with different fiber and matrix types

José‐Trujillo

Rubio-González

Rodríguez‐González

2018

Journal of Composite Materials

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The use of fiber-reinforced composites in marine applications such as components of tidal turbines and wave energy converters is becoming attractive because of their reduced weight and improved corrosion resistance. However, when these polymer matrix composite structures are exposed to seawater environment, degradation of material properties is produced affecting reliability. A deep understating of seawater ageing effect on composite structures is essential to ensure long-term performance and durability. A systematic investigation was conducted in this work to evaluate the effect of seawater ageing on mechanical properties of five different composites manufactured with two types of fiber fabrics (unidirectional glass and carbon) and three types of resin systems (epoxy, vinylester and polyester). The behavior of samples with and without accelerated seawater ageing and subjected to tensile, compressive, flexural and shear loading was evaluated. A significant strength reduction due to seawater ageing was observed on composites with epoxy and polyester matrices. Low strength and stiffness values of composites with vinylester matrix are in general observed; however, seawater ageing makes these properties increase slightly. Fracture surface examination by scanning electron microscopy revealed delamination, fiber debonding and resin crumbling due to seawater effect.

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“…The material degradation mechanism of the composites subjected to thermal or/ and hygrothermal aging are reported in earlier studies. 1,12,13,21,24,28,29 They noted that the initiation of thermal degradation involves the loss of a hydrogen atom from the polymer chain as a result of energy input from heat or light. After that, highly reactive and unstable polymer ''free radical'' (R*) and a hydrogen atom with an unpaired electron occur.…”

Section: Resultsmentioning

confidence: 99%

“…Irreversible phenomena taking place during humid ageing was observed. Pal et al 13 investigated the effect of thickness on moisture diffusion through Polymer matrix composite (PMC) laminates 3 and 10 mm in thickness in artificial seawater medium. Vinylester and isopolyester resins with glass and carbon fibers were used.…”

Section: Introductionmentioning

confidence: 99%

Variation of the mechanical properties of E-glass/epoxy composites subjected to hygrothermal aging

Doğan

Atas

2015

Journal of Composite Materials

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In this study, the effects of hygrothermal aging on the mechanical properties and impact behavior of glass-epoxy composites were investigated experimentally. The vacuum-assisted resin infusion molding was used to manufacture composites. In manufacturing of composites, unidirectional E-glass fabrics with areal density of 300 g/m2 and a resin system (Araldite LY 564/Aradur 3487 BD) were used. In order to determine mechanical properties such as modulus of elasticity, longitudinal and transverse strengths, shear strength, and Poisson’s ratio, the composite samples were prepared according to the ASTM standards. Then, the samples were conditioned at a constant temperature (95℃) and a constant humidity (70%) for different periods of times, ranging from 0 h to 1200 h. The conditioning temperature was chosen due to the glass transition temperature (Tg) of the intact composites which is determined as 78℃. It is noted that the most affected mechanical property via material degradation is modulus of elasticity in transverse direction (E2) while the least affected one is shear modulus (G12). The perforation threshold of the composite materials also decreases with increase of conditioning time.

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Effect of laminate thickness on moisture diffusion of polymer matrix composites in artificial seawater ageing

Cited by 16 publications

References 13 publications

Low‐velocity impact behavior of glass fiber‐MWCNT/polymer laminates exposed to seawater and distilled water aging

Low‐velocity impact behavior of glass fiber‐MWCNT/polymer laminates exposed to seawater and distilled water aging

Seawater ageing effect on the mechanical properties of composites with different fiber and matrix types

Variation of the mechanical properties of E-glass/epoxy composites subjected to hygrothermal aging

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