Mechanical properties of pultruded glass fiber-reinforced plastic after moistening

Анискевич, К.; Aniskevich, Andrey; Arnautov, A. K.; Jansons, J.

doi:10.1016/j.compstruct.2012.04.030

Cited by 44 publications

(28 citation statements)

References 6 publications

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“…Chen [13] conducted a compression test under a hygrothermal environment and found that this environment degraded the compression properties of both stitched and unstitched laminates (with a hole). Aniskevich [14] conducted mechanical testing on moistened glass fiber-reinforced polyester composites and found that specimens moistened up to the saturation level suffered from a decrease of 8% and 16.5% in both flexural modulus and strength, respectively. However, the tensile modulus and strength of the material were not affected by the sorbed moisture.…”

Section: Introductionmentioning

confidence: 99%

Improved impact response of hygrothermally conditioned carbon/epoxy woven composites

Zhong

Joshi

2015

Science and Engineering of Composite Materials

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The effects of hygrothermal conditioning and moisture on the impact resistance of carbon fiber/epoxy composite laminates were investigated. Specimens were fabricated from carbon fiber/epoxy woven prepreg materials. The fabricated specimens were either immersed in water at 80°C or subjected to hot/wet (at 80°C in water for 12 h) to cold/dry (at -30°C in a freezer for 12 h) cyclic hygrothermal conditions, which resulted in different moisture contents inside the laminates. It was found that the absorbed moisture did not migrate out from composite materials at -30°C. Neither of the hygrothermal conditions in this study had detrimental effects on the microstructure of the laminates. Low-velocity impact testing was subsequently conducted on the conditioned specimens. When attacked by the same level of impact energy, laminates with different moisture levels experienced different levels of impact damage. Moisture significantly alleviated the extent of damage in carbon fiber/ epoxy woven laminates. The elastic response of the laminate under impact was improved after hygrothermal conditioning. The mechanism behind the improved impact resistance after absorbing moisture was proposed and deliberated. NomenclatureD i Projectile deflection corresponding to incipient damage point, mm D max Maximum projectile deflection, mm D p Projectile deflection corresponding to the peak load point, mm D Z Through-the-thickness diffusivity constant, mm 2 /s DI Damping index E d Impact energy dissipated through damage creation and propagation, J E d1 Damage generation energy before the peak load point, J E d2 Damage generation energy after the peak load point, J E el Impact energy absorbed through elastic deformation, J E p Total energy absorbed corresponding to the peak load point, J E total Total impact energy or actual impact energy exerted on specimens, J F i Incipient damage load or load corresponding to the incipient damage point, kN F p Peak contact force between the impactor and the specimen, kN h Thickness of a plate, mm M f Final moisture content of specimens, % M m Effective equilibrium moisture content, % M 1 Moisture content at time t 1 , % M 2 Moisture content at time t 2 , % W i

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Section: Introductionmentioning

confidence: 99%

Improved impact response of hygrothermally conditioned carbon/epoxy woven composites

Zhong

Joshi

2015

Science and Engineering of Composite Materials

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“…Fiber reinforced polymers are very significant in engineering applications owing to their excellent characteristic such as high strength-to-weight ratios, high stiffness, controllability of property, low coefficient of thermal expansion, admirable corrosion resistance and worthy fatigue resistance [1][2][3][4]. Therefore, they have been commonly used in numerous civil engineering fields such as: the aerospace industry, marine vehicles, chemical, automotive, nuclear engineering and space vehicle.…”

Section: Introductionmentioning

confidence: 99%

Effects of Elliptical Hole on the Correlation of Natural Frequency with Buckling Load of Basalt Laminates Composite Plates

Chhorn

Jung

2020

Science and Engineering of Composite Materials

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Recently, basalt fiber reinforced polymer (BFRP) is acknowledged as an outstanding material for the strengthening of existing concrete structure, especially it was being used in marine vehicles, aerospace, automotive and nuclear engineering. Most of the structures were subjected to severe dynamic loading during their service life that may induce vibration of the structures. However, free vibration studied on the basalt laminates composite plates with elliptical cut-out and correlation of natural frequency with buckling load has been very limited. Therefore, effects of the elliptical hole on the natural frequency of basalt/epoxy composite plates was performed in this study. Effects of stacking sequence (θ), elliptical hole inclination (ϕ), hole geometric ratio (a/b) and position of the elliptical hole were considered. The numerical modeling of free vibration analysis was based on the mechanical properties of BFRP obtained from the experiment. The natural frequencies as well as mode shapes of basalt laminates composite plates were numerically determined using the commercial program software (ABAQUS). Then, the determination of correlation of natural frequencies with buckling load was carried out. Results showed that elliptical hole inclination and fiber orientation angle induced the inverse proportion between natural frequency and buckling load.

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“…The properties of a composite may vary because of changes in the reinforcement or matrix microstructures, the loading conditions, and the surrounding environment, such as heat [10,11] and moisture [12][13][14]. Generally, composite materials that are applied in construction are subjected to different temperatures.…”

Section: Introductionmentioning

confidence: 99%

Effect of Recycled Ceramic Waste Content on the Properties of Unsaturated Polyester Resin

Farsane¹,

Anouar²,

Chah³

et al. 2019

Preprint

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In this study, the properties of unsaturated polyester resin were studied in the presence of recycled ceramic waste particles. Herein, composites were created that contained 28.5-50 wt% porcelain particles (particle size <180 µm). High filler contents increased the gel time and decreased the exotherm temperature of unsaturated polyester resin during curing. The obtained results showed that physical parameters, such as the resin density and porosity, increased as the filler content increased. In addition, the X-ray diffraction results indicated that the produced samples were a combination of ceramic waste particles and unsaturated polyester resin, resulting in semi crystalline structure. The results showed that the maximum water absorption at 40°C increased from 0.97 to 1.5% as the filler content increased from 28.5 to 50 wt%; in this process, the materials experienced a color change but did not lose mechanical performance. Finally, the samples were characterized by thermogravimetric analysis (TGA) to study the effect of porcelain powder on the thermal degradation of the resin. The TGA scans were analyzed with the Friedman method. The results indicated that the samples with porcelain powder exhibited substantially better thermal stability than unsaturated polyester resin.

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Mechanical properties of pultruded glass fiber-reinforced plastic after moistening

Cited by 44 publications

References 6 publications

Improved impact response of hygrothermally conditioned carbon/epoxy woven composites

Improved impact response of hygrothermally conditioned carbon/epoxy woven composites

Effects of Elliptical Hole on the Correlation of Natural Frequency with Buckling Load of Basalt Laminates Composite Plates

Effect of Recycled Ceramic Waste Content on the Properties of Unsaturated Polyester Resin

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