Mechanical properties of pultruded glass fiber reinforced plastic after freeze–thaw cycling

Анискевич, К.; Korkhov, V. P.; Faitelsone, J; Jansons, J.

doi:10.1177/0731684412462755

Cited by 20 publications

(14 citation statements)

References 9 publications

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“…Gomez and Casto [15] also reported considerable reductions of flexural strength and stiffness of both isophthalic polyester or vinylester resins, particularly for the latter resin, which is in accordance with our results. The flexural strength results reported by Aniskevich et al [25] are in general agreement with our test data, in opposition to the flexural modulus which contrasts with our results; differences may be due to post-curing phenomena and matrix hardening caused by the exposure to low temperatures.…”

Section: Flexural Responsesupporting

confidence: 86%

“…Despite some differences (in terms of materials, manufacturing process, and/or test conditions) between the present study and those performed by Karbhari et al [18] and Aniskevich et al [25], the range of variation in DMA results was similar. Fig.…”

Section: Effects Of Thermal Cyclescontrasting

confidence: 57%

“…Aniskevich et al [25] conducted experimental investigations regarding the short-term exposure of polyester-based pultruded GFRP to severe freeze-thaw cycles between À30°C and 20°C, in both dry and wet condition. Flexural properties and linear thermal expansion coefficient changes were assessed.…”

Section: Literature Reviewmentioning

confidence: 99%

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Effects of thermal cycles on the mechanical response of pultruded GFRP profiles used in civil engineering applications

Sousa

Correia

Cabral-Fonseca

et al. 2014

Composite Structures

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This paper presents a literature review and results of an experimental study about the effects of thermal cycles on the physical and mechanical properties of pultruded glass fibre reinforced polymer (GFRP) profiles used in civil engineering structural applications. The GFRP profiles used in this study present similar fibre architecture, differing only in their matrix nature: unsaturated polyester and vinylester. Small-scale coupons obtained from both types of GFRP profiles were exposed to a Mediterranean range of thermal variations (À5°C to 40°C) for up to 190 cycles in a dry condition. The effects of such exposure on the physical and mechanical response of the GFRP materials were assessed and compared using the following experimental techniques: (a) dynamic mechanical analyses (DMA) to assess the viscoelastic behaviour; (b) tensile, flexural and interlaminar shear tests, to evaluate the mechanical properties; and (c) scanning electron microscopy (SEM), to monitor the potential changes in the microstructure due to the degradation (if any) caused by the thermal cycles, as well as the possible changes into the main mechanisms of fracture. After exposure to thermal cycles, the viscoelastic behaviour of the GFRP profiles presented only slight changes, indicating no significant degradation, neither in the matrix structure nor at the fibre-matrix interphase. In terms of mechanical properties, both types of GFRP materials suffered slight changes regarding tensile and interlaminar shear properties. Flexural properties were more affected, particularly the flexural modulus, especially in the first cycles, as degradation tended to stabilize for increasing cycles. The GFRP profile made of vinylester resin presented better overall performance than the one made of polyester, especially regarding the tensile properties. SEM observations of the surfaces of fracture of mechanically tested pultruded specimens showed two main mechanisms of crack propagation: cohesive rupture (matrix cracking), where the crack propagates inside the matrix, and adhesive rupture (fibre-matrix debonding), where the crack propagates at the interface fibre-matrix. Degradation of the polyester matrix caused by the thermal cycles is evidenced by extensive matrix microcracking and increased fibre-matrix debonding. The vinylester matrix resists better to such degradation as fibre-matrix debonding occurs in less extent, and matrix microcracking is scarcely present.

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Section: Flexural Responsesupporting

confidence: 86%

Section: Effects Of Thermal Cyclescontrasting

confidence: 57%

See 1 more Smart Citation

Effects of thermal cycles on the mechanical response of pultruded GFRP profiles used in civil engineering applications

Sousa

Correia

Cabral-Fonseca

et al. 2014

Composite Structures

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“…5 As a result, adding carbon fibers or some other materials to reinforce PC has become one of the hot topics for researchers, and all the research results show that fibers can better reinforce the compression and bending strength. [6][7][8][9][10][11][12][13] However, the use of carbon fibers not only reinforces the mechanical strength of PC, but also produces a certain effect to the damping performance inevitably. Therefore, related scholars all over the world have conducted a series of research on the damping mechanism of carbon fiber-reinforced polymer concrete (CFRPC).…”

Section: Introductionmentioning

confidence: 99%

Forming process and damping properties of carbon fiber-reinforced polymer concrete

Wang

Zhang

2013

Journal of Reinforced Plastics and Composites

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Carbon fiber-reinforced polymer concrete has good damping property that can be used to produce machine tool beds, spindle boxes, and some other basic mechanical components in order to better satisfy the requirement of high-speed and high-precision machining accuracy. In order to get the influence of different components, the damping model is built on the basis of energy dissipation theory and the damping loss factor is defined as a new parameter to characterize the damping property. Typical samples are prepared and single factor experiments of fiber length, fiber dosage, coal ash’s usage, and different surface treatment of carbon fibers are used to validate the aforementioned assumptions. Research results show that the coal ash used in carbon fiber-reinforced polymer concrete plays an important role in enhancing damping. A weak interface bonding condition can get a better damping performance than a strong one. The best damping performance is consistent with reasonable fiber length and its dosage.

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“…Felipe et al (2012) studied and analyzed about glass fiber reinforced plastic sheet under the environmental deterioration on its surface, when placed in a chamber built and also the observed the mechanical behavior when subjected to uniaxial tension. Aniskevich et al (2012) reported on short-term exposure to severe freeze-thaw cycling in the temperature range from -30°C to 20°C of polyester-based glass fiber reinforced plastic both dry and wet. The effect of freeze-thaw cycling of flat specimens cut from I-beam pultruded profile was estimated by use of three-pointbending tests and dilatometric investigation in the temperature range from 20°C to 125°C.…”

Section: Introductionmentioning

confidence: 99%

Effect of Hydrothermal Ageing on Glass Fibre Reinforced Plastic (GFRP) Composite Laminates exposed to Water and Salt Water

Rao¹

2010

Int.J.of Curr. Engg. and Technol

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Mechanical properties of pultruded glass fiber reinforced plastic after freeze–thaw cycling

Cited by 20 publications

References 9 publications

Effects of thermal cycles on the mechanical response of pultruded GFRP profiles used in civil engineering applications

Effects of thermal cycles on the mechanical response of pultruded GFRP profiles used in civil engineering applications

Forming process and damping properties of carbon fiber-reinforced polymer concrete

Effect of Hydrothermal Ageing on Glass Fibre Reinforced Plastic (GFRP) Composite Laminates exposed to Water and Salt Water

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