Effects of UV radiation, moisture and elevated temperature on mechanical properties of GFRP pultruded profiles

Bazli, Milad; Jafari, Armin; Ashrafi, Hamed; Zhao, Xiao Ling; Bai, Yu; Raman, R.K. Singh

doi:10.1016/j.conbuildmat.2019.117137

Cited by 64 publications

(39 citation statements)

References 63 publications

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“…The fact that fibres, the main component responsible for elastic modulus of composites materials, are less affected by the environment compared to the resin can explain this observation. Detailed discussions regarding the effect of laminate thickness on the tensile properties of pultruded profiles under harsh environments can be found in Bazli et al (2020a; 2020b).…”

Section: Resultsmentioning

confidence: 99%

“…Regarding the effect of profiles cross section, the trend was similar to those reported in the previous studies. Readers may refer to Bazli et al (2020a; 2020b) for the details.…”

Section: Resultsmentioning

confidence: 99%

“…Recently, Jafari et al (2019a) studied the mechanical properties of different pultruded GFRP sections pre-exposed to freeze/thaw cycles. They reported the maximum flexural, compressive and tensile strength reductions to be 17%, 26% and 14%, respectively, after the cycles for 3000 h. Bazli et al (2020a) used the same pultruded profiles and reported reductions in maximum flexural, compressive and tensile strength of 27%, 23% and 14%, respectively, after 3000 h of UV exposure and water vapour condensation cycles. The effect of SWSSC and its combination with UV radiation and water vapour condensation on the mechanical properties of the same profiles was also studied by Bazli et al (2020b).…”

Section: Introductionmentioning

confidence: 99%

“…However, in their varying applications, FRP composites are likely to be subjected to various environmental conditions during their storage, transportation and particularly long-term service life (Afshar et al, 2015; Correia et al, 2006; Karbhari, 2003; Keller et al, 2007). For instance, moisture (Hong et al, 2018; Jiang et al, 2014; Oskouei et al, 2018a), thermal cycles (Bazli et al, 2019a; Jafari et al, 2019a), ultraviolet (UV) radiation (Ashrafi et al, 2018; Bazli et al, 2020a), elevated temperature (Bazli et al, 2019b; Galgano et al, 2009; Jafari et al, 2019b; Khaneghahi et al, 2020) as well as alkali and acidic environments (Bazli et al, 2016, 2017) are just some of the harsh environmental conditions in which FRP composites are implemented. Therefore, numerous prior studies have investigated the short- and long-term durability of different FRP composites under various environmental conditions (Bazli et al, 2016; Grammatikos et al, 2015; Khotbehsara et al, 2019; Lau et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

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Durability of glass-fibre-reinforced polymer composites under seawater and sea-sand concrete coupled with harsh outdoor environments

Bazli

Zhao

Jafari

et al. 2020

Advances in Structural Engineering

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This article presents an investigation on the durability of different glass-fibre-reinforced polymer composites when subjected to harsh outdoor conditions, including freeze/thaw cycles, ultraviolet radiation and moisture, as well as when used with seawater sea-sand concrete for construction applications. To achieve this, the effects of a number of parameters, including the environment of exposure, exposure time, profile cross-sectional configuration and orientation of fibres, on the mechanical properties of different glass-fibre-reinforced polymer composites were studied. To investigate the degradation of the mechanical properties, three-point bending, compression and tension tests were conducted on both reference and conditioned samples. Moreover, scanning electron microscopy analyses were performed to examine the contribution of microstructural deterioration to the damage mechanisms of the conditioned composites. Finally, the test results were used to develop empirical regression models to predict the level of retention of mechanical properties of different composites under different environmental conditions. The findings showed the maximum flexural, compressive and tensile strength reductions to be 35%, 48% and 37%, respectively, with regards to the pultruded profiles exposed for 3000 h to freeze/thaw cycles followed by 90 days of seawater sea-sand concrete immersion, while the flexural strength reductions recorded for the vacuum-infused samples subjected to 2000 h of freeze/thaw cycles followed by 90 days of seawater sea-sand concrete immersion were 28%, 72% and 56% for the unidirectional, woven and chopped strand mat laminates, respectively.

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Section: Resultsmentioning

confidence: 99%

“…Regarding the effect of profiles cross section, the trend was similar to those reported in the previous studies. Readers may refer to Bazli et al (2020a; 2020b) for the details.…”

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Durability of glass-fibre-reinforced polymer composites under seawater and sea-sand concrete coupled with harsh outdoor environments

Bazli

Zhao

Jafari

et al. 2020

Advances in Structural Engineering

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“…Despite the outstanding characteristics of FRP/PVC composites, their durability under harsh environmental conditions is still a serious concern [117]. There are numerous studies available on the short-term and long-term durability of different FRP/PVC composites as the main element and reinforcing members under various environmental conditions [95,[118][119][120][121][122].…”

Section: Durabilitymentioning

confidence: 99%

Concrete filled FRP–PVC tubular columns used in the construction sector: A review

Bazli

Rahmani

et al. 2020

jcc

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Aging of bolted joints prepared from electron‐beam‐cured multiwalled carbon nanotube‐based nanocomposites with variable torques

et al. 2021

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We evaluate the behavior of a bolted joint prepared from electron beam (EB)-cured carbon/epoxy nanocomposites under accelerated weathering environment at varying bolt tightening torques. For strength improvement, different weight percentages (wt%) of multiwalled carbon nanotubes (MWCNTs) in the range 0.1-0.5 wt% were incorporated into the composite laminates; 0.3 wt % of MWCNT had the maximum tensile strength. The properties of EB-cured composites were compared with those of thermally cured ones. For accelerated weathering, cyclic exposure of ultraviolet (UV) radiation as well as condensation at elevated temperatures was conducted for 1000 h on the nanocomposite specimens. The chemical, physical, thermal, and mechanical properties of the nanocomposites were studied under accelerated aging conditions. To determine the failure loads in the bolted joints, specimens were prepared as per ASTM D5961. It was found that after 1000 h of aging, there was only 5% reduction in the ultimate failure load for joints prepared with the addition of MWCNTs. It was also found that the bolt torque had a positive effect on the performance of the joints. The experimental results were validated with progressive damage analysis using the characteristic curve method along with the Hashin damage criteria.

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Effects of UV radiation, moisture and elevated temperature on mechanical properties of GFRP pultruded profiles

Cited by 64 publications

References 63 publications

Durability of glass-fibre-reinforced polymer composites under seawater and sea-sand concrete coupled with harsh outdoor environments

Durability of glass-fibre-reinforced polymer composites under seawater and sea-sand concrete coupled with harsh outdoor environments

Concrete filled FRP–PVC tubular columns used in the construction sector: A review

Aging of bolted joints prepared from electron‐beam‐cured multiwalled carbon nanotube‐based nanocomposites with variable torques

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